chore(i18n): remove common.select key orphaned by TrackSheet removal

common.select was only referenced by TrackSheet (removed in this PR);
the i18n:check CI flagged it as unused. en.json only — Crowdin handles
the other locales.

.github/copilot-instructions.md

@@ -42,7 +42,7 @@ and provides seamless media streaming with offline capabilities and Chromecast s
 
 ## Coding Standards
 
-- Use TypeScript for ALL files (no .js files)
+- Use TypeScript for ALL files (no .js files). Tooling-required exceptions: `babel.config.js`, `metro.config.js`, `react-native.config.js`, `tailwind.config.js` (their loaders cannot parse TypeScript)
 - Use descriptive English names for variables, functions, and components
 - Prefer functional React components with hooks
 - Use Jotai atoms for global state management

.github/workflows/detect-duplicate.yml

@@ -30,7 +30,7 @@ jobs:
           bun-version: "1.3.14"
 
       - name: 🔍 Detect duplicate issues
-        run: bun scripts/detect-duplicate-issue.mjs
+        run: bun scripts/detect-duplicate-issue.ts
         env:
           GH_TOKEN: ${{ github.token }}
           GITHUB_REPOSITORY: ${{ github.repository }}

.gitignore

@@ -12,10 +12,6 @@ web-build/
 # Platform-specific Build Directories
 /ios
 /android
-/iostv
-/iosmobile
-/androidmobile
-/androidtv
 
 # Gradle caches (top-level + per-module native projects)
 **/.gradle/

CLAUDE.md

@@ -152,7 +152,7 @@ import { apiAtom } from "@/providers/JellyfinProvider";
 
 ## Coding Standards
 
-- Use TypeScript for all files (no .js)
+- Use TypeScript for all files (no .js). Tooling-required exceptions: `babel.config.js`, `metro.config.js`, `react-native.config.js`, `tailwind.config.js` (their loaders cannot parse TypeScript)
 - Use functional React components with hooks
 - Use Jotai atoms for global state, React Query for server state
 - Follow BiomeJS formatting rules (2-space indent, semicolons, LF line endings)

app/(auth)/player/direct-player.tsx

@@ -456,10 +456,23 @@ export default function DirectPlayerPage() {
     });
     reportPlaybackStopped();
     setIsPlaybackStopped(true);
-    videoRef.current?.pause();
+    // Synchronously destroy the mpv instance + decoder + surface buffers
+    // BEFORE the screen unmounts. Otherwise the next screen (or the next
+    // episode's player) mounts while the old 4K decoder is still alive,
+    // causing OOM on low-RAM devices. Native stop() is idempotent so the
+    // later React unmount cleanup is still safe.
+    videoRef.current?.destroy().catch(() => {});
+    // Pre-libmpv-1.0 used `stop()`:
+    // videoRef.current?.stop();
     revalidateProgressCache();
     // Resume inactivity timer when leaving player (TV only)
     resumeInactivityTimer();
+    // Release the keep-awake wakelock acquired during playback so it
+    // doesn't follow us back to the home screen and block the TV
+    // screensaver. activateKeepAwakeAsync() is tag-scoped to this module
+    // and only released on the "paused" event; without this, navigating
+    // away mid-play leaves FLAG_KEEP_SCREEN_ON set on the window.
+    deactivateKeepAwake();
   }, [videoRef, reportPlaybackStopped, progress, resumeInactivityTimer]);
 
   useEffect(() => {
@@ -1105,6 +1118,15 @@ export default function DirectPlayerPage() {
         nextItem.UserData?.PlaybackPositionTicks?.toString() ?? "",
     }).toString();
 
+    // Destroy the current mpv instance BEFORE navigating so the old 4K
+    // decoder + surface buffers are freed before the new player screen
+    // mounts. Without this, Expo Router briefly holds two simultaneous
+    // mpv instances during the transition (~768 MB of surface buffers
+    // for two 4K HDR10+ decoders) and OOM-kills the app on low-RAM
+    // devices. Native stop() is idempotent so the subsequent React
+    // unmount cleanup is still safe.
+    videoRef.current?.destroy().catch(() => {});
+
     router.replace(`player/direct-player?${queryParams}` as any);
   }, [
     nextItem,
@@ -1115,6 +1137,7 @@ export default function DirectPlayerPage() {
     bitrateValue,
     router,
     isPlaybackStopped,
+    videoRef,
   ]);
 
   // Apply subtitle settings when video loads

app/_layout.tsx

@@ -7,6 +7,7 @@ import { onlineManager, QueryClient } from "@tanstack/react-query";
 import { PersistQueryClientProvider } from "@tanstack/react-query-persist-client";
 import * as BackgroundTask from "expo-background-task";
 import * as Device from "expo-device";
+import { Image } from "expo-image";
 import { DarkTheme, ThemeProvider } from "expo-router/react-navigation";
 import { Platform } from "react-native";
 import { GlobalModal } from "@/components/GlobalModal";
@@ -100,6 +101,22 @@ SplashScreen.setOptions({
   fade: true,
 });
 
+// Cap expo-image's in-memory cache. Default is unbounded (maxMemoryCost=0),
+// which on a 2GB Android TV box leads to ~200MB of decoded backdrops/posters
+// pinned in RAM after browsing. Caps are intentionally tighter on TV (which
+// has less RAM and runs alongside libmpv/MediaCodec) than on mobile.
+// Cost is measured in bytes of decoded bitmap (ARGB8888 = 4 bytes/pixel).
+try {
+  Image.configureCache({
+    maxMemoryCost: Platform.isTV
+      ? 8 * 1024 * 1024 // ~8 MB on TV
+      : 128 * 1024 * 1024, // ~128 MB on mobile
+    maxDiskSize: 200 * 1024 * 1024, // 200 MB disk cache on all platforms
+  });
+} catch {
+  // configureCache is a no-op on some platforms/versions; safe to ignore.
+}
+
 function useNotificationObserver() {
   const router = useRouter();
 

components/TrackSheet.tsx

@@ -1,99 +0,0 @@
-import type { MediaSourceInfo } from "@jellyfin/sdk/lib/generated-client/models";
-import { useMemo, useState } from "react";
-import { useTranslation } from "react-i18next";
-import { Platform, TouchableOpacity, View } from "react-native";
-import { Text } from "./common/Text";
-import { FilterSheet } from "./filters/FilterSheet";
-
-interface Props extends React.ComponentProps<typeof View> {
-  source?: MediaSourceInfo;
-  onChange: (value: number) => void;
-  selected?: number | undefined;
-  streamType?: string;
-  title: string;
-}
-
-export const TrackSheet: React.FC<Props> = ({
-  source,
-  onChange,
-  selected,
-  streamType,
-  title,
-  ...props
-}) => {
-  const isTv = Platform.isTV;
-  const { t } = useTranslation();
-
-  const streams = useMemo(
-    () => source?.MediaStreams?.filter((x) => x.Type === streamType),
-    [source, streamType],
-  );
-
-  const selectedSteam = useMemo(
-    () => streams?.find((x) => x.Index === selected),
-    [streams, selected],
-  );
-
-  const noneOption = useMemo(
-    () => ({ Index: -1, DisplayTitle: t("common.none") }),
-    [t],
-  );
-
-  // Creates a modified data array that includes a "None" option for subtitles
-  // We might want to possibly do this for other places, like audio?
-  const addNoneToSubtitles = useMemo(() => {
-    if (streamType === "Subtitle") {
-      const result = streams ? [noneOption, ...streams] : [noneOption];
-      return result;
-    }
-    return streams;
-  }, [streams, streamType, noneOption]);
-  const [open, setOpen] = useState(false);
-
-  if (isTv || (streams && streams.length === 0)) return null;
-
-  return (
-    <View className='flex shrink' style={{ minWidth: 60 }} {...props}>
-      <View className='flex flex-col'>
-        <Text className='opacity-50 mb-1 text-xs'>{title}</Text>
-        <TouchableOpacity
-          className='bg-neutral-900 h-10 rounded-xl border-neutral-800 border px-3 py-2 flex flex-row items-center justify-between'
-          onPress={() => setOpen(true)}
-        >
-          <Text numberOfLines={1}>
-            {selected === -1 && streamType === "Subtitle"
-              ? t("common.none")
-              : selectedSteam?.DisplayTitle || t("common.select")}
-          </Text>
-        </TouchableOpacity>
-      </View>
-      <FilterSheet
-        open={open}
-        setOpen={setOpen}
-        title={title}
-        data={addNoneToSubtitles || []}
-        values={
-          selected === -1 && streamType === "Subtitle"
-            ? [{ Index: -1, DisplayTitle: t("common.none") }]
-            : selectedSteam
-              ? [selectedSteam]
-              : []
-        }
-        multiple={false}
-        searchFilter={(item, query) => {
-          const label = (item as any).DisplayTitle || "";
-          return label.toLowerCase().includes(query.toLowerCase());
-        }}
-        renderItemLabel={(item) => (
-          <Text>{(item as any).DisplayTitle || ""}</Text>
-        )}
-        set={(vals) => {
-          const chosen = vals[0] as any;
-          if (chosen && chosen.Index !== null && chosen.Index !== undefined) {
-            onChange(chosen.Index);
-          }
-        }}
-      />
-    </View>
-  );
-};

components/home/Home.tv.tsx

@@ -140,9 +140,11 @@ export const Home = () => {
     let isCancelled = false;
 
     const performCrossfade = async () => {
-      // Prefetch the image before starting the crossfade
+      // Prefetch to disk only - the full-size 1920x1080 backdrop (~8MB
+      // decoded ARGB) is too large to pin in the memory cache on every
+      // focus change. Disk cache is fast enough for a 500ms crossfade.
       try {
-        await Image.prefetch(backdropUrl);
+        await Image.prefetch(backdropUrl, "disk");
       } catch {
         // Continue even if prefetch fails
       }

components/home/InfiniteScrollingCollectionList.tv.tsx

@@ -326,9 +326,9 @@ export const InfiniteScrollingCollectionList: React.FC<Props> = ({
           showsHorizontalScrollIndicator={false}
           onEndReached={handleEndReached}
           onEndReachedThreshold={0.5}
-          initialNumToRender={5}
-          maxToRenderPerBatch={3}
-          windowSize={5}
+          initialNumToRender={4}
+          maxToRenderPerBatch={2}
+          windowSize={3}
           removeClippedSubviews={false}
           maintainVisibleContentPosition={{ minIndexForVisible: 0 }}
           style={{ overflow: "visible" }}

components/home/TVHeroCarousel.tsx

@@ -256,8 +256,11 @@ export const TVHeroCarousel: React.FC<TVHeroCarouselProps> = ({
     let isCancelled = false;
 
     const performCrossfade = async () => {
+      // Disk-only prefetch: backdrops are ~8MB decoded ARGB; keeping them
+      // out of the memory cache avoids bloat when the user cycles through
+      // hero items quickly.
       try {
-        await Image.prefetch(backdropUrl);
+        await Image.prefetch(backdropUrl, "disk");
       } catch {
         // Continue even if prefetch fails
       }

components/persons/TVActorPage.tsx

@@ -156,9 +156,9 @@ export const TVActorPage: React.FC<TVActorPageProps> = ({ personId }) => {
     let isCancelled = false;
 
     const performCrossfade = async () => {
-      // Prefetch the image before starting the crossfade
+      // Disk-only prefetch to avoid pinning large backdrops in memory cache.
       try {
-        await Image.prefetch(backdropUrl);
+        await Image.prefetch(backdropUrl, "disk");
       } catch {
         // Continue even if prefetch fails
       }

components/tv/TVPosterCard.tsx

@@ -448,8 +448,8 @@ export const TVPosterCard: React.FC<TVPosterCardProps> = ({
         <Image
           placeholder={{ blurhash }}
           key={item.Id}
-          id={item.Id}
           source={{ uri: imageUrl }}
+          recyclingKey={item.Id}
           cachePolicy='memory-disk'
           contentFit='cover'
           style={{

components/video-player/controls/TechnicalInfoOverlay.tsx

@@ -342,6 +342,12 @@ export const TechnicalInfoOverlay: FC<TechnicalInfoOverlayProps> = memo(
           {info?.cacheSeconds !== undefined && (
             <Text style={textStyle}>
               Buffer: {info.cacheSeconds.toFixed(1)}s
+              {info?.demuxerMaxBytes !== undefined
+                ? ` (cap ${info.demuxerMaxBytes}MB` +
+                  `${info.demuxerMaxBackBytes !== undefined ? ` / ${info.demuxerMaxBackBytes}MB back` : ""}` +
+                  `${info?.cacheSecsLimit !== undefined && info.cacheSecsLimit < 3600 ? ` · ${info.cacheSecsLimit.toFixed(0)}s` : ""}` +
+                  ")"
+                : ""}
             </Text>
           )}
           {info?.voDriver && (
@@ -350,6 +356,12 @@ export const TechnicalInfoOverlay: FC<TechnicalInfoOverlayProps> = memo(
               {info.hwdec ? ` / ${info.hwdec}` : ""}
             </Text>
           )}
+          {info?.estimatedVfFps !== undefined && (
+            <Text style={textStyle}>
+              Output FPS: {info.estimatedVfFps.toFixed(2)}
+              {info?.fps ? ` (container ${formatFps(info.fps)})` : ""}
+            </Text>
+          )}
           {info?.droppedFrames !== undefined && info.droppedFrames > 0 && (
             <Text style={[textStyle, styles.warningText]}>
               Dropped: {info.droppedFrames} frames

constants/MediaTypes.ts

@@ -3,9 +3,13 @@
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
  */
-export default {
+const MediaTypes = {
   Audio: "Audio",
   Video: "Video",
   Photo: "Photo",
   Book: "Book",
-};
+} as const;
+
+export type MediaType = (typeof MediaTypes)[keyof typeof MediaTypes];
+
+export default MediaTypes;

modules/mpv-player/android/build.gradle

@@ -53,5 +53,5 @@ android {
 
 dependencies {
   // libmpv from Maven Central
-  implementation 'dev.jdtech.mpv:libmpv:0.5.1'
+  implementation 'dev.jdtech.mpv:libmpv:1.0.0'
 }

modules/mpv-player/android/src/main/java/expo/modules/mpvplayer/MPVLayerRenderer.kt

@@ -3,14 +3,14 @@ package expo.modules.mpvplayer
 import android.app.UiModeManager
 import android.content.Context
 import android.content.res.Configuration
-import android.content.res.AssetManager
 import android.os.Build
 import android.os.Handler
 import android.os.Looper
+import android.system.Os
 import android.util.Log
 import android.view.Surface
 import java.io.File
-import java.io.FileOutputStream
+import java.util.Locale
 
 /**
  * MPV renderer that wraps libmpv for video playback.
@@ -76,8 +76,15 @@ class MPVLayerRenderer(private val context: Context) : MPVLib.EventObserver {
     
     private var surface: Surface? = null
     private var isRunning = false
-    private var isStopping = false
-    
+
+    // This renderer's own mpv handle. Per-instance (not singleton) — each
+    // player screen gets a fresh mpv handle and drops the reference on stop.
+    // We intentionally do NOT call a destroy() equivalent: libmpv 1.0's
+    // nativeDestroy has an internal use-after-free we can't fix from Kotlin,
+    // so we mirror Findroid and let the JVM GC + native finalization path
+    // reclaim resources. Only one player is alive at a time in this app.
+    private var mpv: MPVLib? = null
+
     // Cached state
     private var cachedPosition: Double = 0.0
     private var cachedDuration: Double = 0.0
@@ -137,106 +144,108 @@ class MPVLayerRenderer(private val context: Context) : MPVLib.EventObserver {
 
     fun start(voDriver: String = "gpu-next") {
         if (isRunning) return
-        
+
         try {
-            MPVLib.create(context)
-            MPVLib.addObserver(this)
-            
-            /**
-             * Create mpv config directory and copy font files to ensure SubRip subtitles load properly on Android.
-             *
-             * Technical Background:
-             * ====================
-             * On Android, mpv requires access to a font file to render text-based subtitles, particularly SubRip (.srt)
-             * format subtitles. Without an available font in the config directory, mpv will fail to display subtitles
-             * even when subtitle tracks are properly detected and loaded.
-             *
-             * Why This Is Necessary:
-             * =====================
-             * 1. Android's font system is isolated from native libraries like mpv. While Android has system fonts,
-             *    mpv cannot access them directly due to sandboxing and library isolation.
-             *
-             * 2. SubRip subtitles require a font to render text overlay on video. When no font is available in the
-             *    configured directory, mpv either:
-             *    - Fails silently (subtitles don't appear)
-             *    - Falls back to a default font that may not support the required character set
-             *    - Crashes or produces rendering errors
-             *
-             * 3. By placing a font file (font.ttf) in mpv's config directory and setting that directory via
-             *    MPVLib.setOptionString("config-dir", ...), we ensure mpv has a known, accessible font source.
-             *
-             * Reference:
-             * =========
-             * This workaround is documented in the mpv-android project:
-             * https://github.com/mpv-android/mpv-android/issues/96
-             *
-             * The issue discusses that without a font in the config directory, SubRip subtitles fail to load
-             * properly on Android, and the solution is to copy a font file to a known location that mpv can access.
-             */
-            // Create mpv config directory and copy font files
+            // Per-instance handle — see class-level comment. Each player gets
+            // its own mpv; we drop the reference in stop().
+            val mpv = MPVLib.create(context)
+            this.mpv = mpv
+            mpv.addObserver(this)
+
+            // Resolved once — TV gets the memory-pressure customizations
+            // (SCUDO_OPTIONS, hwdec/profile, demuxer-seekable-cache, larger
+            // audio-buffer) that would be counterproductive on higher-RAM
+            // mobile devices. Demuxer cache sizes are NOT included here —
+            // those come from user settings via load().
+            val isTV = isTvDevice()
+
+            // mpv config directory — used by the config-dir option below and
+            // as XDG_CONFIG_HOME for fontconfig.
             val mpvDir = File(context.getExternalFilesDir(null) ?: context.filesDir, "mpv")
-            //Log.i(TAG, "mpv config dir: $mpvDir")
             if (!mpvDir.exists()) mpvDir.mkdirs()
-            // This needs to be named `subfont.ttf` else it won't work
-            arrayOf("subfont.ttf").forEach { fileName ->
-                val file = File(mpvDir, fileName)
-                if (file.exists()) return@forEach
-                context.assets
-                    .open(fileName, AssetManager.ACCESS_STREAMING)
-                    .copyTo(FileOutputStream(file))
+
+            // Point fontconfig (new in libmpv 1.0) at writable app dirs so it
+            // persists its font index across runs instead of re-walking
+            // /system/fonts on every subtitle/seek event. Each rebuild costs
+            // ~1-2 s and ~10-30 MB of scudo:primary memory that scudo then
+            // holds onto. Without this we see "No usable fontconfig
+            // configuration file found, using fallback" on every re-init.
+            try {
+                val cacheDir = context.cacheDir.absolutePath
+                val configDir = (context.getExternalFilesDir(null) ?: context.filesDir).absolutePath
+                Os.setenv("XDG_CACHE_HOME", cacheDir, true)
+                Os.setenv("XDG_CONFIG_HOME", configDir, true)
+                Os.setenv("HOME", configDir, true)
+            } catch (e: Exception) {
+                Log.w(TAG, "Could not set XDG/HOME env for fontconfig: ${e.message}")
             }
-            MPVLib.setOptionString("config", "yes")
-            MPVLib.setOptionString("config-dir", mpvDir.path)
+
+            mpv?.setOptionString("config", "yes")
+            mpv?.setOptionString("config-dir", mpvDir.path)
             
             // Configure mpv options before initialization (based on Findroid)
             this.voDriver = voDriver
-            MPVLib.setOptionString("vo", voDriver)
-            MPVLib.setOptionString("gpu-context", "android")
-            MPVLib.setOptionString("opengl-es", "yes")
+            mpv?.setOptionString("vo", voDriver)
+            mpv?.setOptionString("gpu-context", "android")
+            mpv?.setOptionString("opengl-es", "yes")
             
-            // Hardware decode path:
-            //  - Real TV hardware: zero-copy `mediacodec` (fastest on low-power devices).
+            // Hardware decoder codecs (shared)
+            mpv?.setOptionString("hwdec-codecs", "h264,hevc,mpeg4,mpeg2video,vp8,vp9,av1")
+
+            // Pause on initial cache fill (shared default). The actual
+            // cache mode, cache-secs, and demuxer cache sizes come from
+            // user preferences and are applied per-load in load().
+            mpv?.setOptionString("cache-pause-initial", "yes")
+
+            // Hardware decode path + TV-only memory options. Demuxer cache
+            // sizes and cache-secs are NOT set here — they come from user
+            // preferences via load().
+            //  - Emulator: software decode. Its MediaCodec can't bind an
+            //    output surface (surface 0x0); HEVC then fails cleanly and
+            //    mpv auto-falls-back to software, but H.264 "opens"
+            //    deceptively and wedges the core with no fallback (black
+            //    video, then any command — seek/pause — deadlocks the UI
+            //    thread → ANR). hwdec=no makes every codec render via the
+            //    gpu-next VO. Real devices unaffected.
+            //  - Real TV hardware: zero-copy `mediacodec` (fastest on
+            //    low-power devices) + fast profile.
             //  - Real phone: `mediacodec-copy` (broadest compatibility).
-            //  - Emulator: software decode. Its MediaCodec can't bind an output surface
-            //    (surface 0x0); HEVC then fails cleanly and mpv auto-falls-back to software,
-            //    but H.264 "opens" deceptively and wedges the core with no fallback (black
-            //    video, then any command — seek/pause — deadlocks the UI thread → ANR).
-            //    hwdec=no makes every codec render via the gpu-next VO. Real devices unaffected.
             when {
-                isEmulator() -> MPVLib.setOptionString("hwdec", "no")
-                isTvDevice() -> {
-                    MPVLib.setOptionString("hwdec", "mediacodec")
-                    MPVLib.setOptionString("profile", "fast")
+                isEmulator() -> mpv?.setOptionString("hwdec", "no")
+                isTV -> {
+                    mpv?.setOptionString("hwdec", "mediacodec")
+                    mpv?.setOptionString("profile", "fast")
+                    // Don't retain already-played content for backward
+                    // seeking over a network source — Jellyfin can re-fetch
+                    // on demand. Saves up to ~30 MiB on long seeks and
+                    // reduces swap pressure.
+                    mpv?.setOptionString("demuxer-seekable-cache", "no")
+                    // Larger audio buffer to absorb page-fault stalls
+                    // (default ~0.2s). Cheap insurance against the audio
+                    // underruns that happen when the kernel is swap-thrashing.
+                    mpv?.setOptionString("audio-buffer", "0.5")
                 }
-                else -> MPVLib.setOptionString("hwdec", "mediacodec-copy")
+                else -> mpv?.setOptionString("hwdec", "mediacodec-copy")
             }
-            MPVLib.setOptionString("hwdec-codecs", "h264,hevc,mpeg4,mpeg2video,vp8,vp9,av1")
-            
-            // Cache settings for better network streaming
-            MPVLib.setOptionString("cache", "yes")
-            MPVLib.setOptionString("cache-pause-initial", "yes")
-            MPVLib.setOptionString("demuxer-max-bytes", "150MiB")
-            MPVLib.setOptionString("demuxer-max-back-bytes", "75MiB")
-            MPVLib.setOptionString("demuxer-readahead-secs", "20")
             
             // Seeking optimization - faster seeking at the cost of less precision
             // Use keyframe seeking by default (much faster for network streams)
-            MPVLib.setOptionString("hr-seek", "no")
+            mpv?.setOptionString("hr-seek", "no")
             // Drop frames during seeking for faster response
-            MPVLib.setOptionString("hr-seek-framedrop", "yes")
+            mpv?.setOptionString("hr-seek-framedrop", "yes")
             
             // Subtitle settings
-            MPVLib.setOptionString("sub-scale-with-window", "no")
-            MPVLib.setOptionString("sub-use-margins", "no")
-            MPVLib.setOptionString("subs-match-os-language", "yes")
-            MPVLib.setOptionString("subs-fallback", "yes")
+            mpv?.setOptionString("sub-scale-with-window", "no")
+            mpv?.setOptionString("sub-use-margins", "no")
+            mpv?.setOptionString("subs-match-os-language", "yes")
+            mpv?.setOptionString("subs-fallback", "yes")
             
             // Important: Start with force-window=no, will be set to yes when surface is attached
-            MPVLib.setOptionString("force-window", "no")
-            MPVLib.setOptionString("keep-open", "always")
-            
-            MPVLib.initialize()
-            
+            mpv?.setOptionString("force-window", "no")
+            mpv?.setOptionString("keep-open", "always")
+
+            mpv.initialize()
+
             // Observe properties
             observeProperties()
             
@@ -249,21 +258,68 @@ class MPVLayerRenderer(private val context: Context) : MPVLib.EventObserver {
     }
     
     fun stop() {
-        if (isStopping) return
         if (!isRunning) return
-        
-        isStopping = true
         isRunning = false
-        
-        try {
-            MPVLib.removeObserver(this)
-            MPVLib.detachSurface()
-            MPVLib.destroy()
-        } catch (e: Exception) {
-            Log.e(TAG, "Error stopping MPV: ${e.message}")
-        }
-        
-        isStopping = false
+
+        val m = mpv
+        mpv = null
+
+        // Clear cached media state on the main thread so the next player
+        // screen doesn't observe stale position/duration values during the
+        // (async) teardown below.
+        currentUrl = null
+        currentHeaders = null
+        pendingExternalSubtitles = emptyList()
+        initialSubtitleId = null
+        initialAudioId = null
+        cachedPosition = 0.0
+        cachedDuration = 0.0
+        cachedCacheSeconds = 0.0
+
+        if (m == null) return
+
+        // Teardown runs on a background daemon thread. mpv's "stop" command
+        // flushes the demuxer queue and releases the MediaCodec hardware
+        // decoder — synchronous JNI work that can block for hundreds of ms
+        // on TV hardware. Running it on the main thread produced a visible
+        // delay/stutter between pressing "exit" and the confirm alert
+        // appearing. The local `m` keeps the MPVLib instance alive for the
+        // lifetime of this thread even though we've already nulled `mpv`.
+        Thread {
+            // Drop force-window BEFORE issuing stop. With keep-open=always +
+            // force-window=yes, mpv tears down the decoder at stop time but
+            // tries to keep the VO alive — which fires an internal
+            // video-reconfig. On libmpv 1.0's gpu-next/android backend that
+            // reconfig path crashes with "Missing surface pointer" because we
+            // detach the Surface below before mpv's worker reaches the
+            // reconfig step (command() is async). Setting force-window=no
+            // first makes mpv tear VO down cleanly instead of attempting a
+            // doomed re-init, eliminating the fatal VO error and the
+            // "playback won't restart" aftermath.
+            try {
+                m.setOptionString("force-window", "no")
+            } catch (e: Exception) {
+                Log.e(TAG, "Error clearing force-window: ${e.message}")
+            }
+            try {
+                // Stop playback — flushes demuxer queue and signals MediaCodec
+                // to release its hardware decoders. This is the bulk of what
+                // we can reclaim without calling destroy().
+                m.command(arrayOf("stop"))
+            } catch (e: Exception) {
+                Log.e(TAG, "Error stopping mpv playback: ${e.message}")
+            }
+            try {
+                m.removeObserver(this)
+            } catch (e: Exception) {
+                Log.e(TAG, "Error removing mpv observer: ${e.message}")
+            }
+            try {
+                m.detachSurface()
+            } catch (e: Exception) {
+                Log.e(TAG, "Error detaching mpv surface: ${e.message}")
+            }
+        }.also { it.isDaemon = true }.start()
     }
     
     /**
@@ -278,10 +334,10 @@ class MPVLayerRenderer(private val context: Context) : MPVLib.EventObserver {
         this.surface = surface
         Log.i(TAG, "[PiP] attachSurface — isRunning=$isRunning, vo=$voDriver, surface=${surface.hashCode()}")
         if (isRunning) {
-            MPVLib.attachSurface(surface)
-            MPVLib.setOptionString("force-window", "yes")
+            mpv?.attachSurface(surface)
+            mpv?.setOptionString("force-window", "yes")
             // Read back vo to confirm it's still active
-            val activeVo = try { MPVLib.getPropertyString("vo") } catch (e: Exception) { null }
+            val activeVo = try { mpv?.getPropertyString("vo") } catch (e: Exception) { null }
             Log.i(TAG, "[PiP] attachSurface — attached, activeVo=$activeVo")
         }
     }
@@ -301,8 +357,8 @@ class MPVLayerRenderer(private val context: Context) : MPVLib.EventObserver {
         this.surface = null
         Log.i(TAG, "[PiP] detachSurface — isRunning=$isRunning, vo=$voDriver")
         if (isRunning) {
-            MPVLib.detachSurface()
-            val activeVo = try { MPVLib.getPropertyString("vo") } catch (e: Exception) { null }
+            mpv?.detachSurface()
+            val activeVo = try { mpv?.getPropertyString("vo") } catch (e: Exception) { null }
             Log.i(TAG, "[PiP] detachSurface — detached, activeVo=$activeVo (should still be $voDriver)")
         }
     }
@@ -313,7 +369,7 @@ class MPVLayerRenderer(private val context: Context) : MPVLib.EventObserver {
      */
     fun updateSurfaceSize(width: Int, height: Int) {
         if (isRunning) {
-            MPVLib.setPropertyString("android-surface-size", "${width}x$height")
+            mpv?.setPropertyString("android-surface-size", "${width}x$height")
             Log.i(TAG, "[PiP] updateSurfaceSize — ${width}x${height}")
         } else {
             Log.w(TAG, "[PiP] updateSurfaceSize — called but renderer not running")
@@ -329,9 +385,9 @@ class MPVLayerRenderer(private val context: Context) : MPVLib.EventObserver {
         if (!isRunning) return
         val pos = cachedPosition
         Log.i(TAG, "[PiP] forceRedraw — stepping frame then seeking to $pos")
-        MPVLib.command(arrayOf("frame-step"))
+        mpv?.command(arrayOf("frame-step"))
         if (pos > 0) {
-            MPVLib.command(arrayOf("seek", pos.toString(), "absolute"))
+            mpv?.command(arrayOf("seek", pos.toString(), "absolute"))
         }
     }
     
@@ -341,29 +397,43 @@ class MPVLayerRenderer(private val context: Context) : MPVLib.EventObserver {
         startPosition: Double? = null,
         externalSubtitles: List<String>? = null,
         initialSubtitleId: Int? = null,
-        initialAudioId: Int? = null
+        initialAudioId: Int? = null,
+        cacheEnabled: String? = null,
+        cacheSeconds: Int? = null,
+        demuxerMaxBytes: Int? = null,
+        demuxerMaxBackBytes: Int? = null
     ) {
         currentUrl = url
         currentHeaders = headers
         pendingExternalSubtitles = externalSubtitles ?: emptyList()
         this.initialSubtitleId = initialSubtitleId
         this.initialAudioId = initialAudioId
-        
+
         _isLoading = true
         isReadyToSeek = false
         mainHandler.post { delegate?.onLoadingChanged(true) }
-        
+
         // Stop previous playback
-        MPVLib.command(arrayOf("stop"))
-        
+        mpv?.command(arrayOf("stop"))
+
         // Set HTTP headers if provided
         updateHttpHeaders(headers)
+
+        // Apply cache/buffer settings from user preferences (mirrors iOS).
+        // These override the conservative defaults applied in start() so the
+        // TV/mobile settings screen actually takes effect on Android.
+        cacheEnabled?.let { mpv?.setOptionString("cache", it) }
+        cacheSeconds?.let { mpv?.setOptionString("cache-secs", it.toString()) }
+        demuxerMaxBytes?.let { mpv?.setOptionString("demuxer-max-bytes", "${it}MiB") }
+        demuxerMaxBackBytes?.let { mpv?.setOptionString("demuxer-max-back-bytes", "${it}MiB") }
         
-        // Set start position
+        // Set start position. mpv's time parser requires '.' as the decimal
+        // separator; use Locale.US so devices with other default locales
+        // (e.g. ',' as decimal separator) don't break resume-from-position.
         if (startPosition != null && startPosition > 0) {
-            MPVLib.setPropertyString("start", String.format("%.2f", startPosition))
+            mpv?.setPropertyString("start", String.format(Locale.US, "%.2f", startPosition))
         } else {
-            MPVLib.setPropertyString("start", "0")
+            mpv?.setPropertyString("start", "0")
         }
         
         // Set initial audio track if specified
@@ -383,7 +453,7 @@ class MPVLayerRenderer(private val context: Context) : MPVLib.EventObserver {
         }
         
         // Load the file
-        MPVLib.command(arrayOf("loadfile", url, "replace"))
+        mpv?.command(arrayOf("loadfile", url, "replace"))
     }
     
     fun reloadCurrentItem() {
@@ -399,29 +469,29 @@ class MPVLayerRenderer(private val context: Context) : MPVLib.EventObserver {
         }
         
         val headerString = headers.entries.joinToString("\r\n") { "${it.key}: ${it.value}" }
-        MPVLib.setPropertyString("http-header-fields", headerString)
+        mpv?.setPropertyString("http-header-fields", headerString)
     }
     
     private fun observeProperties() {
-        MPVLib.observeProperty("duration", MPV_FORMAT_DOUBLE)
-        MPVLib.observeProperty("time-pos", MPV_FORMAT_DOUBLE)
-        MPVLib.observeProperty("pause", MPV_FORMAT_FLAG)
-        MPVLib.observeProperty("track-list/count", MPV_FORMAT_INT64)
-        MPVLib.observeProperty("paused-for-cache", MPV_FORMAT_FLAG)
-        MPVLib.observeProperty("demuxer-cache-duration", MPV_FORMAT_DOUBLE)
+        mpv?.observeProperty("duration", MPV_FORMAT_DOUBLE)
+        mpv?.observeProperty("time-pos", MPV_FORMAT_DOUBLE)
+        mpv?.observeProperty("pause", MPV_FORMAT_FLAG)
+        mpv?.observeProperty("track-list/count", MPV_FORMAT_INT64)
+        mpv?.observeProperty("paused-for-cache", MPV_FORMAT_FLAG)
+        mpv?.observeProperty("demuxer-cache-duration", MPV_FORMAT_DOUBLE)
         // Video dimensions for PiP aspect ratio
-        MPVLib.observeProperty("video-params/w", MPV_FORMAT_INT64)
-        MPVLib.observeProperty("video-params/h", MPV_FORMAT_INT64)
+        mpv?.observeProperty("video-params/w", MPV_FORMAT_INT64)
+        mpv?.observeProperty("video-params/h", MPV_FORMAT_INT64)
     }
-    
+
     // MARK: - Playback Controls
     
     fun play() {
-        MPVLib.setPropertyBoolean("pause", false)
+        mpv?.setPropertyBoolean("pause", false)
     }
     
     fun pause() {
-        MPVLib.setPropertyBoolean("pause", true)
+        mpv?.setPropertyBoolean("pause", true)
     }
     
     fun togglePause() {
@@ -431,22 +501,22 @@ class MPVLayerRenderer(private val context: Context) : MPVLib.EventObserver {
     fun seekTo(seconds: Double) {
         val clamped = maxOf(0.0, seconds)
         cachedPosition = clamped
-        MPVLib.command(arrayOf("seek", clamped.toString(), "absolute"))
+        mpv?.command(arrayOf("seek", clamped.toString(), "absolute"))
     }
     
     fun seekBy(seconds: Double) {
         val newPosition = maxOf(0.0, cachedPosition + seconds)
         cachedPosition = newPosition
-        MPVLib.command(arrayOf("seek", seconds.toString(), "relative"))
+        mpv?.command(arrayOf("seek", seconds.toString(), "relative"))
     }
     
     fun setSpeed(speed: Double) {
         _playbackSpeed = speed
-        MPVLib.setPropertyDouble("speed", speed)
+        mpv?.setPropertyDouble("speed", speed)
     }
     
     fun getSpeed(): Double {
-        return MPVLib.getPropertyDouble("speed") ?: _playbackSpeed
+        return mpv?.getPropertyDouble("speed") ?: _playbackSpeed
     }
     
     // MARK: - Subtitle Controls
@@ -454,19 +524,19 @@ class MPVLayerRenderer(private val context: Context) : MPVLib.EventObserver {
     fun getSubtitleTracks(): List<Map<String, Any>> {
         val tracks = mutableListOf<Map<String, Any>>()
         
-        val trackCount = MPVLib.getPropertyInt("track-list/count") ?: 0
+        val trackCount = mpv?.getPropertyInt("track-list/count") ?: 0
         
         for (i in 0 until trackCount) {
-            val trackType = MPVLib.getPropertyString("track-list/$i/type") ?: continue
+            val trackType = mpv?.getPropertyString("track-list/$i/type") ?: continue
             if (trackType != "sub") continue
             
-            val trackId = MPVLib.getPropertyInt("track-list/$i/id") ?: continue
+            val trackId = mpv?.getPropertyInt("track-list/$i/id") ?: continue
             val track = mutableMapOf<String, Any>("id" to trackId)
             
-            MPVLib.getPropertyString("track-list/$i/title")?.let { track["title"] = it }
-            MPVLib.getPropertyString("track-list/$i/lang")?.let { track["lang"] = it }
+            mpv?.getPropertyString("track-list/$i/title")?.let { track["title"] = it }
+            mpv?.getPropertyString("track-list/$i/lang")?.let { track["lang"] = it }
             
-            val selected = MPVLib.getPropertyBoolean("track-list/$i/selected") ?: false
+            val selected = mpv?.getPropertyBoolean("track-list/$i/selected") ?: false
             track["selected"] = selected
             
             tracks.add(track)
@@ -478,61 +548,61 @@ class MPVLayerRenderer(private val context: Context) : MPVLib.EventObserver {
     fun setSubtitleTrack(trackId: Int) {
         Log.i(TAG, "setSubtitleTrack: setting sid to $trackId")
         if (trackId < 0) {
-            MPVLib.setPropertyString("sid", "no")
+            mpv?.setPropertyString("sid", "no")
         } else {
-            MPVLib.setPropertyInt("sid", trackId)
+            mpv?.setPropertyInt("sid", trackId)
         }
     }
     
     fun disableSubtitles() {
-        MPVLib.setPropertyString("sid", "no")
+        mpv?.setPropertyString("sid", "no")
     }
     
     fun getCurrentSubtitleTrack(): Int {
-        return MPVLib.getPropertyInt("sid") ?: 0
+        return mpv?.getPropertyInt("sid") ?: 0
     }
     
     fun addSubtitleFile(url: String, select: Boolean = true) {
         val flag = if (select) "select" else "cached"
-        MPVLib.command(arrayOf("sub-add", url, flag))
+        mpv?.command(arrayOf("sub-add", url, flag))
     }
     
     // MARK: - Subtitle Positioning
     
     fun setSubtitlePosition(position: Int) {
-        MPVLib.setPropertyInt("sub-pos", position)
+        mpv?.setPropertyInt("sub-pos", position)
     }
     
     fun setSubtitleScale(scale: Double) {
-        MPVLib.setPropertyDouble("sub-scale", scale)
+        mpv?.setPropertyDouble("sub-scale", scale)
     }
     
     fun setSubtitleMarginY(margin: Int) {
-        MPVLib.setPropertyInt("sub-margin-y", margin)
+        mpv?.setPropertyInt("sub-margin-y", margin)
     }
     
     fun setSubtitleAlignX(alignment: String) {
-        MPVLib.setPropertyString("sub-align-x", alignment)
+        mpv?.setPropertyString("sub-align-x", alignment)
     }
     
     fun setSubtitleAlignY(alignment: String) {
-        MPVLib.setPropertyString("sub-align-y", alignment)
+        mpv?.setPropertyString("sub-align-y", alignment)
     }
     
     fun setSubtitleFontSize(size: Int) {
-        MPVLib.setPropertyInt("sub-font-size", size)
+        mpv?.setPropertyInt("sub-font-size", size)
     }
 
     fun setSubtitleBorderStyle(style: String) {
-        MPVLib.setPropertyString("sub-border-style", style)
+        mpv?.setPropertyString("sub-border-style", style)
     }
 
     fun setSubtitleBackgroundColor(color: String) {
-        MPVLib.setPropertyString("sub-back-color", color)
+        mpv?.setPropertyString("sub-back-color", color)
     }
 
     fun setSubtitleAssOverride(mode: String) {
-        MPVLib.setPropertyString("sub-ass-override", mode)
+        mpv?.setPropertyString("sub-ass-override", mode)
     }
 
     // MARK: - Audio Track Controls
@@ -540,25 +610,25 @@ class MPVLayerRenderer(private val context: Context) : MPVLib.EventObserver {
     fun getAudioTracks(): List<Map<String, Any>> {
         val tracks = mutableListOf<Map<String, Any>>()
         
-        val trackCount = MPVLib.getPropertyInt("track-list/count") ?: 0
+        val trackCount = mpv?.getPropertyInt("track-list/count") ?: 0
         
         for (i in 0 until trackCount) {
-            val trackType = MPVLib.getPropertyString("track-list/$i/type") ?: continue
+            val trackType = mpv?.getPropertyString("track-list/$i/type") ?: continue
             if (trackType != "audio") continue
             
-            val trackId = MPVLib.getPropertyInt("track-list/$i/id") ?: continue
+            val trackId = mpv?.getPropertyInt("track-list/$i/id") ?: continue
             val track = mutableMapOf<String, Any>("id" to trackId)
             
-            MPVLib.getPropertyString("track-list/$i/title")?.let { track["title"] = it }
-            MPVLib.getPropertyString("track-list/$i/lang")?.let { track["lang"] = it }
-            MPVLib.getPropertyString("track-list/$i/codec")?.let { track["codec"] = it }
+            mpv?.getPropertyString("track-list/$i/title")?.let { track["title"] = it }
+            mpv?.getPropertyString("track-list/$i/lang")?.let { track["lang"] = it }
+            mpv?.getPropertyString("track-list/$i/codec")?.let { track["codec"] = it }
             
-            val channels = MPVLib.getPropertyInt("track-list/$i/audio-channels")
+            val channels = mpv?.getPropertyInt("track-list/$i/audio-channels")
             if (channels != null && channels > 0) {
                 track["channels"] = channels
             }
             
-            val selected = MPVLib.getPropertyBoolean("track-list/$i/selected") ?: false
+            val selected = mpv?.getPropertyBoolean("track-list/$i/selected") ?: false
             track["selected"] = selected
             
             tracks.add(track)
@@ -569,11 +639,11 @@ class MPVLayerRenderer(private val context: Context) : MPVLib.EventObserver {
     
     fun setAudioTrack(trackId: Int) {
         Log.i(TAG, "setAudioTrack: setting aid to $trackId")
-        MPVLib.setPropertyInt("aid", trackId)
+        mpv?.setPropertyInt("aid", trackId)
     }
     
     fun getCurrentAudioTrack(): Int {
-        return MPVLib.getPropertyInt("aid") ?: 0
+        return mpv?.getPropertyInt("aid") ?: 0
     }
 
     // MARK: - Video Scaling
@@ -582,7 +652,7 @@ class MPVLayerRenderer(private val context: Context) : MPVLib.EventObserver {
         // panscan: 0.0 = fit (letterbox), 1.0 = fill (crop)
         val panscanValue = if (zoomed) 1.0 else 0.0
         Log.i(TAG, "setZoomedToFill: setting panscan to $panscanValue")
-        MPVLib.setPropertyDouble("panscan", panscanValue)
+        mpv?.setPropertyDouble("panscan", panscanValue)
     }
 
     // MARK: - Technical Info
@@ -591,58 +661,79 @@ class MPVLayerRenderer(private val context: Context) : MPVLib.EventObserver {
         val info = mutableMapOf<String, Any>()
 
         // Video dimensions
-        MPVLib.getPropertyInt("video-params/w")?.takeIf { it > 0 }?.let {
+        mpv?.getPropertyInt("video-params/w")?.takeIf { it > 0 }?.let {
             info["videoWidth"] = it
         }
-        MPVLib.getPropertyInt("video-params/h")?.takeIf { it > 0 }?.let {
+        mpv?.getPropertyInt("video-params/h")?.takeIf { it > 0 }?.let {
             info["videoHeight"] = it
         }
 
         // Video codec
-        MPVLib.getPropertyString("video-format")?.let {
+        mpv?.getPropertyString("video-format")?.let {
             info["videoCodec"] = it
         }
 
         // Audio codec
-        MPVLib.getPropertyString("audio-codec-name")?.let {
+        mpv?.getPropertyString("audio-codec-name")?.let {
             info["audioCodec"] = it
         }
 
         // FPS (container fps)
-        MPVLib.getPropertyDouble("container-fps")?.takeIf { it > 0 }?.let {
+        mpv?.getPropertyDouble("container-fps")?.takeIf { it > 0 }?.let {
             info["fps"] = it
         }
 
         // Video bitrate (bits per second)
-        MPVLib.getPropertyInt("video-bitrate")?.takeIf { it > 0 }?.let {
+        mpv?.getPropertyInt("video-bitrate")?.takeIf { it > 0 }?.let {
             info["videoBitrate"] = it
         }
 
         // Audio bitrate (bits per second)
-        MPVLib.getPropertyInt("audio-bitrate")?.takeIf { it > 0 }?.let {
+        mpv?.getPropertyInt("audio-bitrate")?.takeIf { it > 0 }?.let {
             info["audioBitrate"] = it
         }
 
         // Demuxer cache duration (seconds of video buffered)
-        MPVLib.getPropertyDouble("demuxer-cache-duration")?.let {
+        mpv?.getPropertyDouble("demuxer-cache-duration")?.let {
             info["cacheSeconds"] = it
         }
 
+        // Configured cache limits — read back from mpv to confirm user
+        // settings actually took effect. mpv stores byte sizes as int64
+        // (bytes); convert to MiB for display.
+        mpv?.getPropertyInt("demuxer-max-bytes")?.let { bytes ->
+            info["demuxerMaxBytes"] = bytes / (1024 * 1024)
+        }
+        mpv?.getPropertyInt("demuxer-max-back-bytes")?.let { bytes ->
+            info["demuxerMaxBackBytes"] = bytes / (1024 * 1024)
+        }
+        mpv?.getPropertyDouble("cache-secs")?.let { secs ->
+            info["cacheSecsLimit"] = secs
+        }
+
         // Dropped frames
-        MPVLib.getPropertyInt("frame-drop-count")?.let {
+        mpv?.getPropertyInt("frame-drop-count")?.let {
             info["droppedFrames"] = it
         }
 
         // Active video output driver (read from MPV to confirm what's actually applied)
-        MPVLib.getPropertyString("vo")?.let {
+        mpv?.getPropertyString("vo")?.let {
             info["voDriver"] = it
         }
 
-        // Active hardware decoder
-        MPVLib.getPropertyString("hwdec-active")?.let {
+        // Active hardware decoder.
+        // hwdec-current yields e.g. "mediacodec",
+        // "mediacodec-copy", "auto-copy" or empty when SW decoding.
+        mpv?.getPropertyString("hwdec-current")?.let {
             info["hwdec"] = it
         }
 
+        // Estimated video output fps (renderer-side, after filtering).
+        // Useful for diagnosing display/pipeline drops vs container fps.
+        mpv?.getPropertyDouble("estimated-vf-fps")?.takeIf { it > 0 }?.let {
+            info["estimatedVfFps"] = it
+        }
+
         return info
     }
 
@@ -735,7 +826,7 @@ class MPVLayerRenderer(private val context: Context) : MPVLib.EventObserver {
                     pendingExternalSubtitles.forEachIndexed { index, subUrl ->
                         android.util.Log.d("MPVRenderer", "Adding external subtitle [$index]: $subUrl")
                         // "auto" flag = add without auto-selecting (order preserved, MPVLib.command is sync)
-                        MPVLib.command(arrayOf("sub-add", subUrl, "auto"))
+                        mpv?.command(arrayOf("sub-add", subUrl, "auto"))
                     }
                     pendingExternalSubtitles = emptyList()
                 }

modules/mpv-player/android/src/main/java/expo/modules/mpvplayer/MPVLib.kt

@@ -1,20 +1,29 @@
 package expo.modules.mpvplayer
 
 import android.content.Context
-import android.util.Log
-import android.view.Surface
 import dev.jdtech.mpv.MPVLib as LibMPV
 
 /**
- * Wrapper around the dev.jdtech.mpv.MPVLib class.
- * This provides a consistent interface for the rest of the app.
+ * Per-instance wrapper around the dev.jdtech.mpv.MPVLib class.
+ *
+ * libmpv 1.0 exposes an instance-based API: each `LibMPV.create(ctx)` returns
+ * a fresh, independent handle. Each player creates its own MPVLib instance
+ * (Findroid pattern) and on teardown we simply drop the reference. We do NOT
+ * call `LibMPV.destroy()` — its native implementation has an internal
+ * use-after-free on libmpv 1.0 that we cannot fix from Kotlin. Letting the
+ * GC reach the JVM-level finalizer (or never reaching it, since the native
+ * handle lives in process-global state until exit) is strictly safer than
+ * crashing.
+ *
+ * Trade-off: mpv's native footprint (decoder + demuxer cache) for one player
+ * stays allocated until the next player's allocation displaces it in scudo's
+ * arena. On a TV app where the player is the dominant memory consumer and
+ * only one player is alive at a time, this is acceptable.
  */
-object MPVLib {
-    private const val TAG = "MPVLib"
-    
-    private var initialized = false
-    
-    // Event observer interface
+class MPVLib private constructor(private val instance: LibMPV) {
+
+    // Event observer interface — mirrors dev.jdtech.mpv.MPVLib.EventObserver
+    // so MPVLayerRenderer implements a stable, wrapper-owned signature.
     interface EventObserver {
         fun eventProperty(property: String)
         fun eventProperty(property: String, value: Long)
@@ -23,198 +32,144 @@ object MPVLib {
         fun eventProperty(property: String, value: Double)
         fun event(eventId: Int)
     }
-    
+
     private val observers = mutableListOf<EventObserver>()
-    
-    // Library event observer that forwards to our observers
+
+    // Library event observer that forwards LibMPV callbacks to our observers.
     private val libObserver = object : LibMPV.EventObserver {
-        override fun eventProperty(property: String) {
+        override fun eventProperty(property: String) =
+            dispatch { it.eventProperty(property) }
+
+        override fun eventProperty(property: String, value: Long) =
+            dispatch { it.eventProperty(property, value) }
+
+        override fun eventProperty(property: String, value: Boolean) =
+            dispatch { it.eventProperty(property, value) }
+
+        override fun eventProperty(property: String, value: String) =
+            dispatch { it.eventProperty(property, value) }
+
+        override fun eventProperty(property: String, value: Double) =
+            dispatch { it.eventProperty(property, value) }
+
+        override fun event(eventId: Int) =
+            dispatch { it.event(eventId) }
+
+        private inline fun dispatch(block: (EventObserver) -> Unit) {
             synchronized(observers) {
-                for (observer in observers) {
-                    observer.eventProperty(property)
-                }
-            }
-        }
-        
-        override fun eventProperty(property: String, value: Long) {
-            synchronized(observers) {
-                for (observer in observers) {
-                    observer.eventProperty(property, value)
-                }
-            }
-        }
-        
-        override fun eventProperty(property: String, value: Boolean) {
-            synchronized(observers) {
-                for (observer in observers) {
-                    observer.eventProperty(property, value)
-                }
-            }
-        }
-        
-        override fun eventProperty(property: String, value: String) {
-            synchronized(observers) {
-                for (observer in observers) {
-                    observer.eventProperty(property, value)
-                }
-            }
-        }
-        
-        override fun eventProperty(property: String, value: Double) {
-            synchronized(observers) {
-                for (observer in observers) {
-                    observer.eventProperty(property, value)
-                }
-            }
-        }
-        
-        override fun event(eventId: Int) {
-            synchronized(observers) {
-                for (observer in observers) {
-                    observer.event(eventId)
-                }
+                observers.forEach(block)
             }
         }
     }
-    
+
     fun addObserver(observer: EventObserver) {
-        synchronized(observers) {
-            observers.add(observer)
-        }
+        synchronized(observers) { observers.add(observer) }
     }
-    
+
     fun removeObserver(observer: EventObserver) {
-        synchronized(observers) {
-            observers.remove(observer)
-        }
+        synchronized(observers) { observers.remove(observer) }
     }
-    
-    // MPV Event IDs
-    const val MPV_EVENT_NONE = 0
-    const val MPV_EVENT_SHUTDOWN = 1
-    const val MPV_EVENT_LOG_MESSAGE = 2
-    const val MPV_EVENT_GET_PROPERTY_REPLY = 3
-    const val MPV_EVENT_SET_PROPERTY_REPLY = 4
-    const val MPV_EVENT_COMMAND_REPLY = 5
-    const val MPV_EVENT_START_FILE = 6
-    const val MPV_EVENT_END_FILE = 7
-    const val MPV_EVENT_FILE_LOADED = 8
-    const val MPV_EVENT_IDLE = 11
-    const val MPV_EVENT_TICK = 14
-    const val MPV_EVENT_CLIENT_MESSAGE = 16
-    const val MPV_EVENT_VIDEO_RECONFIG = 17
-    const val MPV_EVENT_AUDIO_RECONFIG = 18
-    const val MPV_EVENT_SEEK = 20
-    const val MPV_EVENT_PLAYBACK_RESTART = 21
-    const val MPV_EVENT_PROPERTY_CHANGE = 22
-    const val MPV_EVENT_QUEUE_OVERFLOW = 24
-    
-    // End file reason
-    const val MPV_END_FILE_REASON_EOF = 0
-    const val MPV_END_FILE_REASON_STOP = 2
-    const val MPV_END_FILE_REASON_QUIT = 3
-    const val MPV_END_FILE_REASON_ERROR = 4
-    const val MPV_END_FILE_REASON_REDIRECT = 5
-    
-    /**
-     * Create and initialize the MPV library
-     */
-    fun create(context: Context, configDir: String? = null) {
-        if (initialized) return
-        
-        try {
-            LibMPV.create(context)
-            LibMPV.addObserver(libObserver)
-            initialized = true
-            Log.i(TAG, "libmpv created successfully")
-        } catch (e: Exception) {
-            Log.e(TAG, "Failed to create libmpv: ${e.message}")
-            throw e
-        }
-    }
-    
+
     fun initialize() {
-        LibMPV.init()
+        instance.init()
     }
-    
-    fun destroy() {
-        if (!initialized) return
-        try {
-            LibMPV.removeObserver(libObserver)
-            LibMPV.destroy()
-        } catch (e: Exception) {
-            Log.e(TAG, "Error destroying mpv: ${e.message}")
-        }
-        initialized = false
+
+    fun attachSurface(surface: android.view.Surface) {
+        instance.attachSurface(surface)
     }
-    
-    fun isInitialized(): Boolean = initialized
-    
-    fun attachSurface(surface: Surface) {
-        LibMPV.attachSurface(surface)
-    }
-    
+
     fun detachSurface() {
-        LibMPV.detachSurface()
+        instance.detachSurface()
     }
-    
-    fun command(cmd: Array<String?>) {
-        LibMPV.command(cmd)
+
+    fun command(cmd: Array<String>) {
+        instance.command(cmd)
     }
-    
+
     fun setOptionString(name: String, value: String): Int {
-        return LibMPV.setOptionString(name, value)
+        return instance.setOptionString(name, value)
     }
-    
-    fun getPropertyInt(name: String): Int? {
-        return try {
-            LibMPV.getPropertyInt(name)
-        } catch (e: Exception) {
-            null
-        }
-    }
-    
-    fun getPropertyDouble(name: String): Double? {
-        return try {
-            LibMPV.getPropertyDouble(name)
-        } catch (e: Exception) {
-            null
-        }
-    }
-    
-    fun getPropertyBoolean(name: String): Boolean? {
-        return try {
-            LibMPV.getPropertyBoolean(name)
-        } catch (e: Exception) {
-            null
-        }
-    }
-    
-    fun getPropertyString(name: String): String? {
-        return try {
-            LibMPV.getPropertyString(name)
-        } catch (e: Exception) {
-            null
-        }
-    }
-    
+
+    fun getPropertyInt(name: String): Int? = try {
+        instance.getPropertyInt(name)
+    } catch (e: Exception) { null }
+
+    fun getPropertyDouble(name: String): Double? = try {
+        instance.getPropertyDouble(name)
+    } catch (e: Exception) { null }
+
+    fun getPropertyBoolean(name: String): Boolean? = try {
+        instance.getPropertyBoolean(name)
+    } catch (e: Exception) { null }
+
+    fun getPropertyString(name: String): String? = try {
+        instance.getPropertyString(name)
+    } catch (e: Exception) { null }
+
     fun setPropertyInt(name: String, value: Int) {
-        LibMPV.setPropertyInt(name, value)
+        instance.setPropertyInt(name, value)
     }
-    
+
     fun setPropertyDouble(name: String, value: Double) {
-        LibMPV.setPropertyDouble(name, value)
+        instance.setPropertyDouble(name, value)
     }
-    
+
     fun setPropertyBoolean(name: String, value: Boolean) {
-        LibMPV.setPropertyBoolean(name, value)
+        instance.setPropertyBoolean(name, value)
     }
-    
+
     fun setPropertyString(name: String, value: String) {
-        LibMPV.setPropertyString(name, value)
+        instance.setPropertyString(name, value)
     }
-    
+
     fun observeProperty(name: String, format: Int) {
-        LibMPV.observeProperty(name, format)
+        instance.observeProperty(name, format)
+    }
+
+    companion object {
+        /**
+         * Create a fresh mpv handle. Each call returns an independent instance —
+         * do not share across players. Attach exactly one [EventObserver] per
+         * player via [addObserver].
+         */
+        fun create(context: Context): MPVLib {
+            val lib = LibMPV.create(context)
+                ?: throw IllegalStateException("LibMPV.create returned null")
+            val wrapper = MPVLib(lib)
+            // The libObserver is attached for the lifetime of this MPVLib
+            // instance and forwards every LibMPV callback to our observers
+            // list. Player-specific observers are added/removed via
+            // addObserver/removeObserver.
+            lib.addObserver(wrapper.libObserver)
+            return wrapper
+        }
+
+        // MPV Event IDs (kept here so observers can reference them without
+        // holding a reference to an instance).
+        const val MPV_EVENT_NONE = 0
+        const val MPV_EVENT_SHUTDOWN = 1
+        const val MPV_EVENT_LOG_MESSAGE = 2
+        const val MPV_EVENT_GET_PROPERTY_REPLY = 3
+        const val MPV_EVENT_SET_PROPERTY_REPLY = 4
+        const val MPV_EVENT_COMMAND_REPLY = 5
+        const val MPV_EVENT_START_FILE = 6
+        const val MPV_EVENT_END_FILE = 7
+        const val MPV_EVENT_FILE_LOADED = 8
+        const val MPV_EVENT_IDLE = 11
+        const val MPV_EVENT_TICK = 14
+        const val MPV_EVENT_CLIENT_MESSAGE = 16
+        const val MPV_EVENT_VIDEO_RECONFIG = 17
+        const val MPV_EVENT_AUDIO_RECONFIG = 18
+        const val MPV_EVENT_SEEK = 20
+        const val MPV_EVENT_PLAYBACK_RESTART = 21
+        const val MPV_EVENT_PROPERTY_CHANGE = 22
+        const val MPV_EVENT_QUEUE_OVERFLOW = 24
+
+        // End file reason
+        const val MPV_END_FILE_REASON_EOF = 0
+        const val MPV_END_FILE_REASON_STOP = 2
+        const val MPV_END_FILE_REASON_QUIT = 3
+        const val MPV_END_FILE_REASON_ERROR = 4
+        const val MPV_END_FILE_REASON_REDIRECT = 5
     }
 }

modules/mpv-player/android/src/main/java/expo/modules/mpvplayer/MpvPlayerModule.kt

@@ -28,7 +28,11 @@ class MpvPlayerModule : Module() {
                 if (source == null) return@Prop
                 
                 val urlString = source["url"] as? String ?: return@Prop
-                
+
+                // Parse cache config if provided (mirrors iOS)
+                @Suppress("UNCHECKED_CAST")
+                val cacheConfig = source["cacheConfig"] as? Map<String, Any?>
+
                 @Suppress("UNCHECKED_CAST")
                 val config = VideoLoadConfig(
                     url = urlString,
@@ -38,7 +42,11 @@ class MpvPlayerModule : Module() {
                     autoplay = (source["autoplay"] as? Boolean) ?: true,
                     initialSubtitleId = (source["initialSubtitleId"] as? Number)?.toInt(),
                     initialAudioId = (source["initialAudioId"] as? Number)?.toInt(),
-                    voDriver = source["voDriver"] as? String
+                    voDriver = source["voDriver"] as? String,
+                    cacheEnabled = cacheConfig?.get("enabled") as? String,
+                    cacheSeconds = (cacheConfig?.get("cacheSeconds") as? Number)?.toInt(),
+                    demuxerMaxBytes = (cacheConfig?.get("maxBytes") as? Number)?.toInt(),
+                    demuxerMaxBackBytes = (cacheConfig?.get("maxBackBytes") as? Number)?.toInt()
                 )
                 
                 view.loadVideo(config)
@@ -60,6 +68,15 @@ class MpvPlayerModule : Module() {
                 view.pause()
             }
 
+            // Stop playback and release the MediaCodec decoder + demuxer.
+            // Does not synchronously tear down the native mpv handle (see
+            // MPVLib / MpvPlayerView.destroy docs). Call before navigating
+            // away from the player screen to avoid OOM during screen
+            // transitions on low-RAM devices.
+            AsyncFunction("destroy") { view: MpvPlayerView ->
+                view.destroy()
+            }
+
             // Async function to seek to position
             AsyncFunction("seekTo") { view: MpvPlayerView, position: Double ->
                 view.seekTo(position)

modules/mpv-player/android/src/main/java/expo/modules/mpvplayer/MpvPlayerView.kt

@@ -26,7 +26,11 @@ data class VideoLoadConfig(
     val autoplay: Boolean = true,
     val initialSubtitleId: Int? = null,
     val initialAudioId: Int? = null,
-    val voDriver: String? = null
+    val voDriver: String? = null,
+    val cacheEnabled: String? = null,
+    val cacheSeconds: Int? = null,
+    val demuxerMaxBytes: Int? = null,
+    val demuxerMaxBackBytes: Int? = null
 )
 
 /**
@@ -60,6 +64,7 @@ class MpvPlayerView(context: Context, appContext: AppContext) : ExpoView(context
     private var pendingConfig: VideoLoadConfig? = null
     private var rendererStarted: Boolean = false
     private var pendingSurface: Surface? = null
+    private var activeSurface: Surface? = null
     private var surfaceTexture: SurfaceTexture? = null
 
     // PiP state tracking
@@ -131,6 +136,7 @@ class MpvPlayerView(context: Context, appContext: AppContext) : ExpoView(context
             rendererStarted = true
 
             pendingSurface?.let { surface ->
+                activeSurface = surface
                 renderer?.attachSurface(surface)
                 pendingSurface = null
             }
@@ -149,6 +155,11 @@ class MpvPlayerView(context: Context, appContext: AppContext) : ExpoView(context
         surfaceReady = true
 
         if (rendererStarted) {
+            // Release the previous wrapper Surface before losing the only
+            // reference to it. cleanup() only runs on detach, so without this
+            // repeated PiP/background/resize cycles leak native surface objects.
+            activeSurface?.release()
+            activeSurface = surface
             renderer?.attachSurface(surface)
         } else {
             pendingSurface = surface
@@ -207,7 +218,11 @@ class MpvPlayerView(context: Context, appContext: AppContext) : ExpoView(context
             startPosition = config.startPosition,
             externalSubtitles = config.externalSubtitles,
             initialSubtitleId = config.initialSubtitleId,
-            initialAudioId = config.initialAudioId
+            initialAudioId = config.initialAudioId,
+            cacheEnabled = config.cacheEnabled,
+            cacheSeconds = config.cacheSeconds,
+            demuxerMaxBytes = config.demuxerMaxBytes,
+            demuxerMaxBackBytes = config.demuxerMaxBackBytes
         )
 
         if (config.autoplay) {
@@ -236,6 +251,51 @@ class MpvPlayerView(context: Context, appContext: AppContext) : ExpoView(context
         pipController?.setPlaybackRate(0.0)
     }
 
+    /**
+     * Stop playback and release decoder resources.
+     *
+     * Delegates to [MPVLayerRenderer.stop], which issues mpv's "stop" command
+     * on a background thread (flushing the demuxer and releasing the
+     * MediaCodec hardware decoder) and drops the per-instance mpv handle.
+     *
+     * NOTE: this does NOT call `LibMPV.destroy()`. libmpv 1.0's
+     * nativeDestroy has an internal use-after-free on the JNI global ref
+     * path, so the native mpv handle is intentionally left for the JVM GC
+     * / native finalizer rather than torn down synchronously. See
+     * [MPVLib] class doc for the full rationale.
+     *
+     * Call this BEFORE navigating away from the player screen so the
+     * decoder is reclaimed before the next screen (or the next episode's
+     * player) mounts. Otherwise Expo Router renders the new screen first
+     * and you briefly have two mpv instances + two 4K decoders alive —
+     * instant OOM on a 2 GB device.
+     */
+    fun destroy() {
+        renderer?.stop()
+
+        // Reset view-level state so a subsequent loadVideo() on the SAME view
+        // instance re-creates the mpv handle and re-attaches the still-live
+        // TextureView surface. Without this, rendererStarted stays true and
+        // ensureRendererStarted() early-returns, so renderer.start() is never
+        // called again — but stop() already nulled the renderer's mpv handle.
+        // The next loadVideo() then runs loadVideoInternal() -> renderer.load()
+        // against mpv == null, where every mpv?.command() (including the
+        // "stop" and load commands) silently no-ops, leaving a black frame.
+        //
+        // This path is hit by direct-player.tsx's goToNextItem()/stop(),
+        // which call destroy() immediately before router.replace() to the
+        // same route — Expo Router reuses the same MpvPlayerView instance,
+        // so the next source load happens on this view without a remount.
+        rendererStarted = false
+        currentUrl = null
+        // Move the active surface back to pending so ensureRendererStarted()
+        // re-attaches it to the freshly created mpv instance on next load.
+        // The Surface itself is still valid — onSurfaceTextureDestroyed has
+        // not fired because the TextureView is not being unmounted.
+        activeSurface?.let { pendingSurface = it }
+        activeSurface = null
+    }
+
     fun seekTo(position: Double) {
         renderer?.seekTo(position)
     }
@@ -479,13 +539,32 @@ class MpvPlayerView(context: Context, appContext: AppContext) : ExpoView(context
 
     // MARK: - Cleanup
 
+    /**
+     * Proactively tear down the player. Called from onDetachedFromWindow so
+     * the app releases mpv + decoder buffers when the View detaches from the
+     * window. The JS-facing destroy() is intentionally thinner (just
+     * renderer.stop()) — see this thread for why the full teardown was kept
+     * off the JS path.
+     */
     fun cleanup() {
         isWaitingForPiPTransition = false
         pipHandler.removeCallbacksAndMessages(null)
         pipController?.stopPictureInPicture()
         renderer?.stop()
-        surfaceTexture = null
+        renderer?.delegate = null
+
+        // Release the Surface that wraps the SurfaceTexture. These Surface
+        // objects are created in onSurfaceTextureAvailable and were never
+        // released; each playback session previously leaked one. The
+        // SurfaceTexture itself is owned by TextureView and released by it
+        // via onSurfaceTextureDestroyed, so we leave it alone.
+        pendingSurface?.release()
+        pendingSurface = null
+        activeSurface?.release()
+        activeSurface = null
         surfaceReady = false
+        currentUrl = null
+        rendererStarted = false
     }
 
     override fun onDetachedFromWindow() {

modules/mpv-player/ios/MPVLayerRenderer.swift

@@ -1020,12 +1020,44 @@ final class MPVLayerRenderer {
             info["cacheSeconds"] = cacheSeconds
         }
 
+        // Configured cache limits — read back from mpv to confirm user
+        // settings actually took effect. mpv stores byte sizes as int64
+        // (bytes); convert to MiB for display.
+        var demuxerMaxBytes: Int64 = 0
+        if getProperty(handle: handle, name: "demuxer-max-bytes", format: MPV_FORMAT_INT64, value: &demuxerMaxBytes) >= 0 {
+            info["demuxerMaxBytes"] = Int(demuxerMaxBytes / (1024 * 1024))
+        }
+        var demuxerMaxBackBytes: Int64 = 0
+        if getProperty(handle: handle, name: "demuxer-max-back-bytes", format: MPV_FORMAT_INT64, value: &demuxerMaxBackBytes) >= 0 {
+            info["demuxerMaxBackBytes"] = Int(demuxerMaxBackBytes / (1024 * 1024))
+        }
+        var cacheSecsLimit: Double = 0
+        if getProperty(handle: handle, name: "cache-secs", format: MPV_FORMAT_DOUBLE, value: &cacheSecsLimit) >= 0 {
+            info["cacheSecsLimit"] = cacheSecsLimit
+        }
+
         // Dropped frames
         var droppedFrames: Int64 = 0
         if getProperty(handle: handle, name: "frame-drop-count", format: MPV_FORMAT_INT64, value: &droppedFrames) >= 0 {
             info["droppedFrames"] = Int(droppedFrames)
         }
 
+        // Active video output driver
+        if let voDriver = getStringProperty(handle: handle, name: "vo") {
+            info["voDriver"] = voDriver
+        }
+
+        // Active hardware decoder
+        if let hwdec = getStringProperty(handle: handle, name: "hwdec-current") {
+            info["hwdec"] = hwdec
+        }
+
+        // Estimated video output fps (post-filter)
+        var estimatedVfFps: Double = 0
+        if getProperty(handle: handle, name: "estimated-vf-fps", format: MPV_FORMAT_DOUBLE, value: &estimatedVfFps) >= 0 && estimatedVfFps > 0 {
+            info["estimatedVfFps"] = estimatedVfFps
+        }
+
         return info
     }
 }

modules/mpv-player/ios/MpvPlayerModule.swift

@@ -74,7 +74,13 @@ public class MpvPlayerModule: Module {
       AsyncFunction("pause") { (view: MpvPlayerView) in
         view.pause()
       }
-      
+
+      // Synchronously destroy mpv instance + decoder before navigating
+      // away from the player screen (cross-platform; matches Android).
+      AsyncFunction("destroy") { (view: MpvPlayerView) in
+        view.destroy()
+      }
+
       // Async function to seek to position
       AsyncFunction("seekTo") { (view: MpvPlayerView, position: Double) in
         view.seekTo(position: position)

modules/mpv-player/ios/MpvPlayerView.swift

@@ -289,6 +289,49 @@ class MpvPlayerView: ExpoView {
 		pipController?.updatePlaybackState()
 	}
 
+	/**
+	 * Synchronously stop and destroy the mpv instance + decoder so memory is
+	 * freed before the next screen mounts. Safe to call multiple times — the
+	 * underlying renderer.stop() guards against re-entry.
+	 *
+	 * Cross-platform counterpart of MpvPlayerView.destroy() on Android.
+	 */
+	func destroy() {
+		renderer?.stop()
+
+		// Reset view state and re-create the mpv handle so a subsequent
+		// loadVideo() on the SAME view instance can actually load.
+		// Without this, stop() leaves renderer.mpv == nil, and the next
+		// loadVideo(config:) calls renderer.load() which early-returns
+		// at `guard let handle = self.mpv else { return }` — but only
+		// after flipping isLoading = true and dispatching the loading
+		// delegate callback, so the JS layer is stuck in a perpetual
+		// "loading" state with no actual playback.
+		//
+		// This path is hit by direct-player.tsx's goToNextItem()/stop(),
+		// which call destroy() immediately before router.replace() to
+		// the same route — Expo Router reuses the same MpvPlayerView
+		// instance, so the next `source` prop update arrives on this
+		// view without a remount. setupView() is otherwise the only
+		// place start() is called, so without re-starting here the
+		// renderer stays dead until the whole view is unmounted and
+		// recreated.
+		//
+		// start() is idempotent (`guard !isRunning else { return }`)
+		// and stop() has already nulled mpv synchronously before
+		// dispatching the async mpv_terminate_destroy, so creating a
+		// fresh handle here is safe even while the old handle's
+		// teardown is still in flight on a background queue (libmpv
+		// handles are independent).
+		currentURL = nil
+		intendedPlayState = false
+		do {
+			try renderer?.start()
+		} catch {
+			onError(["error": "Failed to restart renderer after destroy: \(error.localizedDescription)"])
+		}
+	}
+
 	func seekTo(position: Double) {
 		// Update cached position and Now Playing immediately for smooth Control Center feedback
 		cachedPosition = position

modules/mpv-player/src/MpvPlayer.types.ts

@@ -89,6 +89,14 @@ export type MpvPlayerViewProps = {
 export interface MpvPlayerViewRef {
   play: () => Promise<void>;
   pause: () => Promise<void>;
+  /**
+   * Synchronously destroy the mpv instance + decoder + surface buffers.
+   * Call before navigating away from the player screen so memory is
+   * freed before the next screen mounts. Safe to call multiple times.
+   */
+  destroy: () => Promise<void>;
+  // Pre-libmpv-1.0 alias (kept for source-history reference):
+  // stop: () => Promise<void>;
   seekTo: (position: number) => Promise<void>;
   seekBy: (offset: number) => Promise<void>;
   setSpeed: (speed: number) => Promise<void>;
@@ -154,9 +162,17 @@ export type TechnicalInfo = {
   videoBitrate?: number;
   audioBitrate?: number;
   cacheSeconds?: number;
+  /** Configured demuxer forward cache cap (MiB), read back from mpv */
+  demuxerMaxBytes?: number;
+  /** Configured demuxer backward cache cap (MiB), read back from mpv */
+  demuxerMaxBackBytes?: number;
+  /** Configured cache-secs floor, read back from mpv */
+  cacheSecsLimit?: number;
   droppedFrames?: number;
   /** Active video output driver (read from MPV at runtime) */
   voDriver?: string;
   /** Active hardware decoder (read from MPV at runtime) */
   hwdec?: string;
+  /** Estimated video output fps (mpv "estimated-vf-fps") */
+  estimatedVfFps?: number;
 };

modules/mpv-player/src/MpvPlayerView.tsx

@@ -20,6 +20,9 @@ export default React.forwardRef<MpvPlayerViewRef, MpvPlayerViewProps>(
       pause: async () => {
         await nativeRef.current?.pause();
       },
+      destroy: async () => {
+        await nativeRef.current?.destroy();
+      },
       seekTo: async (position: number) => {
         await nativeRef.current?.seekTo(position);
       },

package.json

@@ -17,13 +17,13 @@
     "ios:unsigned-build": "cross-env EXPO_TV=0 bun scripts/ios/build-ios.ts --production",
     "ios:unsigned-build:tv": "cross-env EXPO_TV=1 bun scripts/ios/build-ios.ts --production",
     "prepare": "husky",
-    "typecheck": "node scripts/typecheck.js",
+    "typecheck": "bun scripts/typecheck.ts",
     "check": "biome check . --max-diagnostics 1000",
     "lint": "biome check --write --unsafe --max-diagnostics 1000",
     "format": "biome format --write .",
     "doctor": "expo-doctor",
-    "i18n:check": "bun scripts/check-i18n-keys.mjs",
-    "i18n:fix-unused": "bun scripts/check-i18n-keys.mjs --fix-unused",
+    "i18n:check": "bun scripts/check-i18n-keys.ts",
+    "i18n:fix-unused": "bun scripts/check-i18n-keys.ts --fix-unused",
     "test": "bun run typecheck && bun run lint && bun run format && bun run i18n:check && bun run doctor",
     "postinstall": "patch-package"
   },

plugins/withGradleProperties.js

@@ -27,6 +27,9 @@ module.exports = function withCustomPlugin(config) {
   // https://github.com/expo/expo/issues/32558
   config = setGradlePropertiesValue(config, "android.enableJetifier", "true");
 
+  // NDK version required by libmpv 1.0.0
+  config = setGradlePropertiesValue(config, "ndkVersion", "29.0.14206865");
+
   // Increase memory
   config = setGradlePropertiesValue(
     config,

scripts/check-i18n-keys.ts

@@ -18,11 +18,11 @@
  *   - Edge cases the static scan cannot see can be allow-listed in the config file.
  *
  * Usage:
- *   bun scripts/check-i18n-keys.mjs                # report + exit 1 on missing OR unused
- *   bun scripts/check-i18n-keys.mjs --unused=warn  # exit 1 only on missing; unused = warning
- *   bun scripts/check-i18n-keys.mjs --unused=off   # ignore unused entirely
- *   bun scripts/check-i18n-keys.mjs --json         # machine-readable output
- *   bun scripts/check-i18n-keys.mjs --fix-unused   # remove dead keys from en.json (Crowdin syncs the rest)
+ *   bun scripts/check-i18n-keys.ts                # report + exit 1 on missing OR unused
+ *   bun scripts/check-i18n-keys.ts --unused=warn  # exit 1 only on missing; unused = warning
+ *   bun scripts/check-i18n-keys.ts --unused=off   # ignore unused entirely
+ *   bun scripts/check-i18n-keys.ts --json         # machine-readable output
+ *   bun scripts/check-i18n-keys.ts --fix-unused   # remove dead keys from en.json (Crowdin syncs the rest)
  */
 
 import {
@@ -34,9 +34,20 @@ import {
 } from "node:fs";
 import { extname, join, relative } from "node:path";
 
+type LocaleTree = { [key: string]: LocaleTree | string };
+
+interface I18nConfig {
+  localesDir: string;
+  sourceLocale: string;
+  srcDirs: string[];
+  srcExtensions: string[];
+  excludeDirs: string[];
+  ignoreUnused: string[];
+}
+
 const ROOT = process.cwd();
 const args = process.argv.slice(2);
-const flag = (name, def) => {
+const flag = (name: string, def: string | boolean): string | boolean => {
   const a = args.find((x) => x === `--${name}` || x.startsWith(`--${name}=`));
   if (!a) return def;
   const [, v] = a.split("=");
@@ -48,7 +59,7 @@ const FIX_UNUSED = !!flag("fix-unused", false);
 
 // ---- config ----
 const CONFIG_PATH = join(ROOT, "scripts", "i18n-keys.config.json");
-const DEFAULT_CONFIG = {
+const DEFAULT_CONFIG: I18nConfig = {
   localesDir: "translations",
   sourceLocale: "en",
   // Scan the whole repo by default so keys referenced outside the obvious dirs
@@ -69,29 +80,36 @@ const DEFAULT_CONFIG = {
   // Keys (or glob-ish prefixes ending with .* or *) known to be used dynamically / externally.
   ignoreUnused: [],
 };
-const config = existsSync(CONFIG_PATH)
-  ? { ...DEFAULT_CONFIG, ...JSON.parse(readFileSync(CONFIG_PATH, "utf8")) }
+const config: I18nConfig = existsSync(CONFIG_PATH)
+  ? {
+      ...DEFAULT_CONFIG,
+      ...(JSON.parse(readFileSync(CONFIG_PATH, "utf8")) as Partial<I18nConfig>),
+    }
   : DEFAULT_CONFIG;
 
 // ---- helpers ----
-const flatten = (obj, prefix = "", out = {}) => {
+const flatten = (
+  obj: LocaleTree,
+  prefix = "",
+  out: Record<string, string> = {},
+): Record<string, string> => {
   for (const [k, v] of Object.entries(obj)) {
     const key = prefix ? `${prefix}.${k}` : k;
     if (v && typeof v === "object" && !Array.isArray(v)) flatten(v, key, out);
-    else out[key] = v;
+    else out[key] = v as string;
   }
   return out;
 };
 
-const globMatch = (key, pattern) => {
+const globMatch = (key: string, pattern: string): boolean => {
   if (pattern.endsWith(".*"))
     return key === pattern.slice(0, -2) || key.startsWith(pattern.slice(0, -1));
   if (pattern.endsWith("*")) return key.startsWith(pattern.slice(0, -1));
   return key === pattern;
 };
 
-const walk = (dir, files = []) => {
-  let entries;
+const walk = (dir: string, files: string[] = []): string[] => {
+  let entries: string[];
   try {
     entries = readdirSync(dir);
   } catch {
@@ -99,7 +117,7 @@ const walk = (dir, files = []) => {
   }
   for (const name of entries) {
     const full = join(dir, name);
-    let st;
+    let st: ReturnType<typeof statSync>;
     try {
       st = statSync(full);
     } catch {
@@ -118,7 +136,7 @@ const walk = (dir, files = []) => {
 // ---- load source keys ----
 const sourcePath = join(ROOT, config.localesDir, `${config.sourceLocale}.json`);
 const sourceKeys = Object.keys(
-  flatten(JSON.parse(readFileSync(sourcePath, "utf8"))),
+  flatten(JSON.parse(readFileSync(sourcePath, "utf8")) as LocaleTree),
 );
 const sourceKeySet = new Set(sourceKeys);
 
@@ -129,16 +147,16 @@ const TPL_DYN_RE = /\bt\(\s*`([^`$]*)\$\{/g; // t(`a.b.${x}`) -> prefix "a.b."
 const I18NKEY_RE = /\bi18nKey\s*=\s*(?:\{\s*)?(['"])((?:\\.|(?!\1).)+?)\1/g; // <Trans i18nKey="a.b">
 const KEY_SHAPE = /^[A-Za-z0-9_]+(\.[A-Za-z0-9_]+)+$/; // dotted key, e.g. home.x.y
 
-const usedStatic = new Set(); // keys passed to t(...) / i18nKey — used for MISSING detection
-const dynamicPrefixes = new Set();
-const fullyDynamic = []; // { file, line }
+const usedStatic = new Set<string>(); // keys passed to t(...) / i18nKey — used for MISSING detection
+const dynamicPrefixes = new Set<string>();
+const fullyDynamic: Array<{ file: string; line: number }> = [];
 let codeBlob = ""; // all (comment-stripped) source text — searched for delimited key literals
 
 // Strip comments so keys mentioned in comments (e.g. `// t("old.key")`) are not counted as
 // usage. Block comments and JSX {/* */} are blanked (preserving newlines for line numbers);
 // line comments are only stripped when `//` follows start/whitespace/punctuation, which keeps
 // `://` inside string URLs intact.
-const stripComments = (src) =>
+const stripComments = (src: string): string =>
   src
     .replace(/\/\*[\s\S]*?\*\//g, (m) => m.replace(/[^\n]/g, " "))
     .replace(/(^|[\s;{}()[\],=>])\/\/[^\n]*/g, (_m, p) => p);
@@ -168,11 +186,11 @@ const prefixList = [...dynamicPrefixes];
 // the code (covers t("k"), <Trans i18nKey>, and keys stored as bare string constants in
 // arrays/config then resolved via t(variable)), or it is reached via a dynamic prefix, or
 // explicitly allow-listed. Delimited search avoids substring false-matches (e.g. a.b vs a.b_c).
-const literalUsed = (key) =>
+const literalUsed = (key: string): boolean =>
   codeBlob.includes(`"${key}"`) ||
   codeBlob.includes(`'${key}'`) ||
   codeBlob.includes(`\`${key}\``);
-const isUsed = (key) =>
+const isUsed = (key: string): boolean =>
   literalUsed(key) ||
   prefixList.some((p) => key.startsWith(p)) ||
   config.ignoreUnused.some((g) => globMatch(key, g));
@@ -191,25 +209,22 @@ const missing = [...usedStatic]
 // keys are static literals in practice; revisit if dynamic key constants become common.
 
 // ---- optional fix: strip dead keys from the source locale (en.json) ----
-const removeKey = (obj, parts) => {
+const removeKey = (obj: LocaleTree, parts: string[]): void => {
   const [head, ...rest] = parts;
   if (!(head in obj)) return;
   if (rest.length === 0) {
     delete obj[head];
     return;
   }
-  removeKey(obj[head], rest);
-  if (
-    obj[head] &&
-    typeof obj[head] === "object" &&
-    Object.keys(obj[head]).length === 0
-  )
-    delete obj[head];
+  const child = obj[head];
+  if (!child || typeof child !== "object") return;
+  removeKey(child, rest);
+  if (Object.keys(child).length === 0) delete obj[head];
 };
 if (FIX_UNUSED && unused.length) {
   // Only edit the SOURCE locale (en.json). Crowdin owns the target locales and removes
   // the keys from them automatically on the next sync once they disappear from the source.
-  const data = JSON.parse(readFileSync(sourcePath, "utf8"));
+  const data = JSON.parse(readFileSync(sourcePath, "utf8")) as LocaleTree;
   for (const key of unused) removeKey(data, key.split("."));
   writeFileSync(sourcePath, `${JSON.stringify(data, null, 2)}\n`);
   console.log(
@@ -259,7 +274,7 @@ if (JSON_OUT) {
       );
       for (const k of unused) console.log(`   - ${k}`);
       console.log(
-        `\n   → remove with: bun scripts/check-i18n-keys.mjs --fix-unused`,
+        `\n   → remove with: bun scripts/check-i18n-keys.ts --fix-unused`,
       );
       console.log(
         `   → or allow-list a dynamic key in scripts/i18n-keys.config.json ("ignoreUnused").`,

scripts/detect-duplicate-issue.ts

@@ -21,8 +21,14 @@
 import { execFileSync } from "node:child_process";
 import { readFileSync } from "node:fs";
 
+interface Issue {
+  number: number;
+  title: string;
+  body: string | null;
+}
+
 // Parse a numeric env var, falling back to `def` only when unset/empty/NaN so an explicit 0 is honoured.
-const numEnv = (name, def) => {
+const numEnv = (name: string, def: number): number => {
   const raw = process.env[name];
   if (raw === undefined || raw === "") return def;
   const n = Number(raw);
@@ -51,9 +57,9 @@ const STOP = new Set(
   ).split(/\s+/),
 );
 
-const stem = (w) => w.replace(/(ing|ed|es|s)$/, "");
+const stem = (w: string): string => w.replace(/(ing|ed|es|s)$/, "");
 
-const tokens = (s) =>
+const tokens = (s: string | null): string[] =>
   (s || "")
     .toLowerCase()
     .replace(/```[\s\S]*?```/g, " ") // drop code blocks
@@ -65,7 +71,7 @@ const tokens = (s) =>
     .map(stem)
     .filter((w) => w.length > 2);
 
-const jaccard = (a, b) => {
+const jaccard = (a: string[], b: string[]): number => {
   const A = new Set(a);
   const B = new Set(b);
   if (!A.size || !B.size) return 0;
@@ -76,14 +82,14 @@ const jaccard = (a, b) => {
 
 const newTitle = tokens(TITLE);
 const newBody = tokens(BODY);
-const score = (o) =>
+const score = (o: Issue): number =>
   0.6 * jaccard(newTitle, tokens(o.title)) +
   0.4 * jaccard(newBody, tokens(o.body));
 
 // fetch open issues (excluding PRs and the new issue itself)
-let issues;
+let issues: Issue[];
 if (process.env.DUP_FIXTURE) {
-  issues = JSON.parse(readFileSync(process.env.DUP_FIXTURE, "utf8"));
+  issues = JSON.parse(readFileSync(process.env.DUP_FIXTURE, "utf8")) as Issue[];
 } else {
   const raw = execFileSync(
     "gh",
@@ -105,7 +111,7 @@ if (process.env.DUP_FIXTURE) {
   issues = raw
     .split("\n")
     .filter(Boolean)
-    .map((l) => JSON.parse(l));
+    .map((l) => JSON.parse(l) as Issue);
 }
 
 const matches = issues
@@ -123,7 +129,7 @@ if (!matches.length) {
 // Neutralise other issues' titles before echoing them back: break @mentions and
 // strip markdown/HTML control chars so a maliciously-named issue can't ping people
 // or inject formatting into our comment. GitHub linkifies "#123" on its own.
-const safeTitle = (t) =>
+const safeTitle = (t: string): string =>
   (t || "")
     .replace(/@/g, "@​")
     .replace(/[`<>|*_~[\]]/g, " ")

scripts/symlink-native-dirs.js

@@ -1,62 +0,0 @@
-#!/usr/bin/env node
-
-const _fs = require("node:fs");
-const path = require("node:path");
-const process = require("node:process");
-const { execSync } = require("node:child_process");
-
-const root = process.cwd();
-// const tvosPath = path.join(root, 'iostv');
-// const iosPath = path.join(root, 'iosmobile');
-// const androidPath = path.join(root, 'androidmobile');
-// const androidTVPath = path.join(root, 'androidtv');
-// const device = process.argv[2];
-// const platform = process.argv[2];
-const isTV = process.env.EXPO_TV || false;
-
-const paths = new Map([
-  ["tvos", path.join(root, "iostv")],
-  ["ios", path.join(root, "iosmobile")],
-  ["android", path.join(root, "androidmobile")],
-  ["androidtv", path.join(root, "androidtv")],
-]);
-
-// const platformPath = paths.get(platform);
-
-if (isTV) {
-  stdout = execSync(
-    `mkdir -p ${paths.get("tvos")}; ln -nsf ${paths.get("tvos")} ios`,
-  );
-  console.log(stdout.toString());
-  stdout = execSync(
-    `mkdir -p ${paths.get("androidtv")}; ln -nsf ${paths.get(
-      "androidtv",
-    )} android`,
-  );
-  console.log(stdout.toString());
-} else {
-  stdout = execSync(
-    `mkdir -p ${paths.get("ios")}; ln -nsf ${paths.get("ios")} ios`,
-  );
-  console.log(stdout.toString());
-  stdout = execSync(
-    `mkdir -p ${paths.get("android")}; ln -nsf ${paths.get("android")} android`,
-  );
-  console.log(stdout.toString());
-}
-
-// target = "";
-// switch (platform) {
-//   case "tvos":
-//     target = "ios";
-//     break;
-//   case "ios":
-//     target = "ios";
-//     break;
-//   case "android":
-//     target = "android";
-//     break;
-//   case "androidtv":
-//     target = "android";
-//     break;
-// }

scripts/typecheck.ts

@@ -1,5 +1,8 @@
-const { execFileSync } = require("node:child_process");
-const process = require("node:process");
+import { execFileSync } from "node:child_process";
+import { createRequire } from "node:module";
+import process from "node:process";
+
+const require = createRequire(import.meta.url);
 
 // Enhanced ANSI color codes and styles
 const colors = {
@@ -32,7 +35,7 @@ const centeredTitle = " ".repeat(titlePadding) + title;
 
 const useColor = process.stdout.isTTY && !process.env.NO_COLOR;
 
-function log(message, color = "") {
+function log(message: string, color = "") {
   if (useColor && color) {
     console.log(`${color}${message}${colors.reset}`);
   } else {
@@ -40,7 +43,7 @@ function log(message, color = "") {
   }
 }
 
-function formatError(errorLine) {
+function formatError(errorLine: string): string {
   if (!useColor) return errorLine;
 
   // Color file paths in cyan
@@ -70,12 +73,15 @@ function formatError(errorLine) {
   return formatted;
 }
 
-function parseErrorsAndCreateSummary(errorOutput) {
+function parseErrorsAndCreateSummary(errorOutput: string): {
+  formattedErrors: string[];
+  errorsByFile: Map<string, number>;
+} {
   const lines = errorOutput.split("\n").filter((line) => line.trim());
-  const errorsByFile = new Map();
-  const formattedErrors = [];
+  const errorsByFile = new Map<string, number>();
+  const formattedErrors: string[] = [];
 
-  let currentError = [];
+  let currentError: string[] = [];
 
   for (const line of lines) {
     const trimmedLine = line.trim();
@@ -96,7 +102,7 @@ function parseErrorsAndCreateSummary(errorOutput) {
       if (!errorsByFile.has(filePath)) {
         errorsByFile.set(filePath, 0);
       }
-      errorsByFile.set(filePath, errorsByFile.get(filePath) + 1);
+      errorsByFile.set(filePath, (errorsByFile.get(filePath) ?? 0) + 1);
 
       // Start new error
       currentError.push(formatError(line));
@@ -119,7 +125,7 @@ function parseErrorsAndCreateSummary(errorOutput) {
   return { formattedErrors, errorsByFile };
 }
 
-function createErrorSummaryTable(errorsByFile) {
+function createErrorSummaryTable(errorsByFile: Map<string, number>): string {
   if (errorsByFile.size === 0) return "";
 
   const sortedFiles = Array.from(errorsByFile.entries()).sort(
@@ -136,7 +142,7 @@ function createErrorSummaryTable(errorsByFile) {
   return table;
 }
 
-function runTypeCheck() {
+function runTypeCheck(): { ok: boolean } {
   const extraArgs = process.argv.slice(2);
 
   // Prefer local TypeScript binary when available
@@ -150,16 +156,13 @@ function runTypeCheck() {
     "false",
     ...extraArgs,
   ];
-  let execArgs = null;
+  let execArgs: { cmd: string; args: string[] };
   try {
     const tscBin = require.resolve("typescript/bin/tsc");
     execArgs = { cmd: process.execPath, args: [tscBin, ...runnerArgs] };
   } catch {
-    // fallback to PATH tsc
-    execArgs = {
-      cmd: "tsc",
-      args: ["-p", "tsconfig.json", "--noEmit", ...extraArgs],
-    };
+    // fallback to PATH tsc (reuse runnerArgs so --pretty false is preserved)
+    execArgs = { cmd: "tsc", args: runnerArgs };
   }
 
   try {
@@ -183,7 +186,21 @@ function runTypeCheck() {
     );
     return { ok: true };
   } catch (error) {
-    const errorOutput = (error && (error.stderr || error.stdout)) || "";
+    const execError = error as { stderr?: string; stdout?: string };
+    const errorOutput = [execError.stdout, execError.stderr]
+      .filter((chunk): chunk is string => Boolean(chunk))
+      .join("\n");
+
+    // No compiler output = tsc never ran (e.g. binary missing). Don't let a
+    // launch failure fall through to the "passed" branch and green-light CI.
+    if (!errorOutput) {
+      const message = error instanceof Error ? error.message : String(error);
+      log(
+        `❌ ${colors.bold}TypeScript check failed to start${colors.reset} ${colors.gray}${message}${colors.reset}`,
+        colors.red,
+      );
+      return { ok: false };
+    }
 
     // Filter out jellyseerr utils errors - this is a third-party git submodule
     // that generates a large volume of known type errors

translations/en.json

@@ -484,7 +484,6 @@
   },
   "common": {
     "no_results": "No results",
-    "select": "Select",
     "no_trailer_available": "No trailer available",
     "video": "Video",
     "audio": "Audio",

utils/atoms/settings.ts

@@ -9,6 +9,7 @@ import {
 import { t } from "i18next";
 import { atom, useAtom, useAtomValue } from "jotai";
 import { useCallback, useEffect, useMemo } from "react";
+import { Platform } from "react-native";
 import { BITRATES, type Bitrate } from "@/components/BitrateSelector";
 import * as ScreenOrientation from "@/packages/expo-screen-orientation";
 import { apiAtom } from "@/providers/JellyfinProvider";
@@ -361,11 +362,16 @@ export const defaultValues: Settings = {
   mpvSubtitleFontSize: undefined,
   mpvSubtitleBackgroundEnabled: false,
   mpvSubtitleBackgroundOpacity: 75,
-  // MPV buffer/cache defaults
+  // MPV buffer/cache defaults.
+  // Android TV gets tighter caps — combined with libmpv 1.0's larger
+  // baseline (fontconfig + libxml2 + libplacebo HDR path + scudo
+  // retention) the larger mobile budget pushes 2 GB Android TV boxes
+  // into swap death during 4K HDR playback. Apple TV has more RAM and
+  // keeps the full budget. Users can override via the settings screen.
   mpvCacheEnabled: "auto",
   mpvCacheSeconds: 10,
-  mpvDemuxerMaxBytes: 150, // MB
-  mpvDemuxerMaxBackBytes: 50, // MB
+  mpvDemuxerMaxBytes: Platform.isTV && Platform.OS === "android" ? 75 : 150, // MB
+  mpvDemuxerMaxBackBytes: Platform.isTV && Platform.OS === "android" ? 30 : 50, // MB
   // MPV video output driver defaults (Android only)
   mpvVoDriver: "gpu-next",
   // Gesture controls

utils/profiles/download.ts

@@ -3,17 +3,17 @@
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
  */
-import { generateDeviceProfile } from "./native";
-
-/**
- * @typedef {"auto" | "stereo" | "5.1" | "passthrough"} AudioTranscodeModeType
- */
+import type {
+  DeviceProfile,
+  SubtitleProfile,
+} from "@jellyfin/sdk/lib/generated-client/models";
+import { type AudioTranscodeModeType, generateDeviceProfile } from "./native";
 
 /**
  * Download-specific subtitle profiles.
  * These are more permissive than streaming profiles since we can embed subtitles.
  */
-const downloadSubtitleProfiles = [
+const downloadSubtitleProfiles: SubtitleProfile[] = [
   // Official formats
   { Format: "vtt", Method: "Encode" },
   { Format: "webvtt", Method: "Encode" },
@@ -46,11 +46,10 @@ const downloadSubtitleProfiles = [
 /**
  * Generates a device profile optimized for downloads.
  * Uses the same audio codec logic as streaming but with download-specific bitrate limits.
- *
- * @param {AudioTranscodeModeType} [audioMode="auto"] - Audio transcoding mode
- * @returns {Object} Jellyfin device profile for downloads
  */
-export const generateDownloadProfile = (audioMode = "auto") => {
+export const generateDownloadProfile = (
+  audioMode: AudioTranscodeModeType = "auto",
+): DeviceProfile => {
   // Get the base profile with proper audio codec configuration
   const baseProfile = generateDeviceProfile({ audioMode });
 

utils/profiles/native.ts

@@ -3,6 +3,7 @@
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
  */
+import type { DeviceProfile } from "@jellyfin/sdk/lib/generated-client/models";
 import { Platform } from "react-native";
 import MediaTypes from "../../constants/MediaTypes";
 import { getSubtitleProfiles } from "./subtitles";
@@ -193,7 +194,7 @@ export const generateDeviceProfile = (options: ProfileOptions = {}) => {
       },
     ],
     SubtitleProfiles: getSubtitleProfiles(),
-  };
+  } satisfies DeviceProfile;
 
   return profile;
 };

utils/profiles/subtitles.ts

@@ -3,6 +3,7 @@
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
  */
+import type { SubtitleProfile } from "@jellyfin/sdk/lib/generated-client/models";
 
 // Image-based formats - these need to be burned in by Jellyfin (Encode method)
 // because MPV cannot load them externally over HTTP
@@ -13,7 +14,7 @@ const IMAGE_BASED_FORMATS = [
   "pgssub",
   "teletext",
   "vobsub",
-];
+] as const;
 
 // Text-based formats - these can be loaded externally by MPV
 const TEXT_BASED_FORMATS = [
@@ -37,10 +38,10 @@ const TEXT_BASED_FORMATS = [
   "text",
   "vplayer",
   "xsub",
-];
+] as const;
 
-export const getSubtitleProfiles = () => {
-  const profiles = [];
+export const getSubtitleProfiles = (): SubtitleProfile[] => {
+  const profiles: SubtitleProfile[] = [];
 
   // Image-based formats: Embed or Encode (burn-in), NOT External
   for (const format of IMAGE_BASED_FORMATS) {
@@ -58,4 +59,4 @@ export const getSubtitleProfiles = () => {
 };
 
 // Export for use in player filtering
-export const IMAGE_SUBTITLE_CODECS = IMAGE_BASED_FORMATS;
+export const IMAGE_SUBTITLE_CODECS: readonly string[] = IMAGE_BASED_FORMATS;

utils/profiles/trackplayer.d.ts

@@ -1,19 +0,0 @@
-/**
- * This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/.
- */
-
-export type PlatformType = "ios" | "android";
-
-export interface TrackPlayerProfileOptions {
-  /** Target platform */
-  platform?: PlatformType;
-}
-
-export function generateTrackPlayerProfile(
-  options?: TrackPlayerProfileOptions,
-): any;
-
-declare const _default: any;
-export default _default;

utils/profiles/trackplayer.ts

@@ -3,23 +3,25 @@
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
  */
+import type {
+  CodecProfile,
+  DeviceProfile,
+  DirectPlayProfile,
+} from "@jellyfin/sdk/lib/generated-client/models";
 import { Platform } from "react-native";
 import MediaTypes from "../../constants/MediaTypes";
+import type { PlatformType } from "./native";
 
-/**
- * @typedef {"ios" | "android"} PlatformType
- *
- * @typedef {Object} TrackPlayerProfileOptions
- * @property {PlatformType} [platform] - Target platform
- */
+export interface TrackPlayerProfileOptions {
+  /** Target platform */
+  platform?: PlatformType;
+}
 
 /**
  * Audio direct play profiles for react-native-track-player.
  * iOS uses AVPlayer, Android uses ExoPlayer - each has different codec support.
- *
- * @param {PlatformType} platform
  */
-const getDirectPlayProfile = (platform) => {
+const getDirectPlayProfile = (platform: PlatformType): DirectPlayProfile => {
   if (platform === "ios") {
     // iOS AVPlayer supported formats
     return {
@@ -39,10 +41,8 @@ const getDirectPlayProfile = (platform) => {
 
 /**
  * Audio codec profiles for react-native-track-player.
- *
- * @param {PlatformType} platform
  */
-const getCodecProfile = (platform) => {
+const getCodecProfile = (platform: PlatformType): CodecProfile => {
   if (platform === "ios") {
     // iOS AVPlayer codec constraints
     return {
@@ -64,12 +64,11 @@ const getCodecProfile = (platform) => {
  * This profile is specifically for standalone audio playback using:
  * - AVPlayer on iOS
  * - ExoPlayer on Android
- *
- * @param {TrackPlayerProfileOptions} [options] - Profile configuration options
- * @returns {Object} Jellyfin device profile for track player
  */
-export const generateTrackPlayerProfile = (options = {}) => {
-  const platform = options.platform || Platform.OS;
+export const generateTrackPlayerProfile = (
+  options: TrackPlayerProfileOptions = {},
+): DeviceProfile => {
+  const platform = (options.platform || Platform.OS) as PlatformType;
 
   return {
     Name: "Track Player",