feat(mpv): add opaque subtitle background with adjustable opacity (iOS only)

components/settings/MpvSubtitleSettings.tsx

@@ -1,6 +1,6 @@
 import { Ionicons } from "@expo/vector-icons";
 import { useMemo } from "react";
-import { Platform, View, type ViewProps } from "react-native";
+import { Platform, Switch, View, type ViewProps } from "react-native";
 import { Stepper } from "@/components/inputs/Stepper";
 import { Text } from "../common/Text";
 import { ListGroup } from "../list/ListGroup";
@@ -55,7 +55,6 @@ export const MpvSubtitleSettings: React.FC<Props> = ({ ...props }) => {
     return [{ options }];
   }, [settings?.mpvSubtitleAlignY, updateSettings]);
 
-  if (isTv) return null;
   if (!settings) return null;
 
   return (
@@ -68,53 +67,83 @@ export const MpvSubtitleSettings: React.FC<Props> = ({ ...props }) => {
           </Text>
         }
       >
-        <ListItem title='Vertical Margin'>
-          <Stepper
-            value={settings.mpvSubtitleMarginY ?? 0}
-            step={5}
-            min={0}
-            max={100}
-            onUpdate={(value) => updateSettings({ mpvSubtitleMarginY: value })}
+        {!isTv && (
+          <>
+            <ListItem title='Vertical Margin'>
+              <Stepper
+                value={settings.mpvSubtitleMarginY ?? 0}
+                step={5}
+                min={0}
+                max={100}
+                onUpdate={(value) =>
+                  updateSettings({ mpvSubtitleMarginY: value })
+                }
+              />
+            </ListItem>
+
+            <ListItem title='Horizontal Alignment'>
+              <PlatformDropdown
+                groups={alignXOptionGroups}
+                trigger={
+                  <View className='flex flex-row items-center justify-between py-1.5 pl-3'>
+                    <Text className='mr-1 text-[#8E8D91]'>
+                      {alignXLabels[settings?.mpvSubtitleAlignX ?? "center"]}
+                    </Text>
+                    <Ionicons
+                      name='chevron-expand-sharp'
+                      size={18}
+                      color='#5A5960'
+                    />
+                  </View>
+                }
+                title='Horizontal Alignment'
+              />
+            </ListItem>
+
+            <ListItem title='Vertical Alignment'>
+              <PlatformDropdown
+                groups={alignYOptionGroups}
+                trigger={
+                  <View className='flex flex-row items-center justify-between py-1.5 pl-3'>
+                    <Text className='mr-1 text-[#8E8D91]'>
+                      {alignYLabels[settings?.mpvSubtitleAlignY ?? "bottom"]}
+                    </Text>
+                    <Ionicons
+                      name='chevron-expand-sharp'
+                      size={18}
+                      color='#5A5960'
+                    />
+                  </View>
+                }
+                title='Vertical Alignment'
+              />
+            </ListItem>
+          </>
+        )}
+
+        <ListItem title='Opaque Background'>
+          <Switch
+            value={settings.mpvSubtitleBackgroundEnabled ?? false}
+            onValueChange={(value) =>
+              updateSettings({ mpvSubtitleBackgroundEnabled: value })
+            }
           />
         </ListItem>
 
-        <ListItem title='Horizontal Alignment'>
-          <PlatformDropdown
-            groups={alignXOptionGroups}
-            trigger={
-              <View className='flex flex-row items-center justify-between py-1.5 pl-3'>
-                <Text className='mr-1 text-[#8E8D91]'>
-                  {alignXLabels[settings?.mpvSubtitleAlignX ?? "center"]}
-                </Text>
-                <Ionicons
-                  name='chevron-expand-sharp'
-                  size={18}
-                  color='#5A5960'
-                />
-              </View>
-            }
-            title='Horizontal Alignment'
-          />
-        </ListItem>
-
-        <ListItem title='Vertical Alignment'>
-          <PlatformDropdown
-            groups={alignYOptionGroups}
-            trigger={
-              <View className='flex flex-row items-center justify-between py-1.5 pl-3'>
-                <Text className='mr-1 text-[#8E8D91]'>
-                  {alignYLabels[settings?.mpvSubtitleAlignY ?? "bottom"]}
-                </Text>
-                <Ionicons
-                  name='chevron-expand-sharp'
-                  size={18}
-                  color='#5A5960'
-                />
-              </View>
-            }
-            title='Vertical Alignment'
-          />
-        </ListItem>
+        {settings.mpvSubtitleBackgroundEnabled && (
+          <ListItem title='Background Opacity'>
+            <Stepper
+              value={settings.mpvSubtitleBackgroundOpacity ?? 75}
+              step={5}
+              min={10}
+              max={100}
+              appendValue='%'
+              onUpdate={(value) =>
+                updateSettings({ mpvSubtitleBackgroundOpacity: value })
+              }
+            />
+          </ListItem>
+        )}
       </ListGroup>
     </View>
   );

modules/mpv-player/ios/MPVLayerRenderer.swift

@@ -195,7 +195,8 @@ final class MPVLayerRenderer {
         // CRITICAL: This option MUST be set immediately after vo=avfoundation, before hwdec options.
         // On tvOS, moving this elsewhere causes the app to freeze when exiting the player.
         // - iOS: "yes" for PiP subtitle support (subtitles baked into video)
-        // - tvOS: "no" to prevent gray tint + frame drops with subtitles
+        // - tvOS: "no" - composite OSD breaks subtitle rendering entirely on tvOS
+        //         Note: This means subtitle styling (background colors) won't work on tvOS
         #if os(tvOS)
         checkError(mpv_set_option_string(handle, "avfoundation-composite-osd", "no"))
         #else
@@ -820,7 +821,22 @@ final class MPVLayerRenderer {
     func setSubtitleFontSize(_ size: Int) {
         setProperty(name: "sub-font-size", value: String(size))
     }
-    
+
+    func setSubtitleBackgroundColor(_ color: String) {
+        setProperty(name: "sub-back-color", value: color)
+    }
+
+    func setSubtitleBorderStyle(_ style: String) {
+        // "outline-and-shadow" (default) or "background-box" (enables background color)
+        setProperty(name: "sub-border-style", value: style)
+    }
+
+    func setSubtitleAssOverride(_ mode: String) {
+        // Controls whether to override ASS subtitle styles
+        // "no" = keep ASS styles, "force" = override with user settings
+        setProperty(name: "sub-ass-override", value: mode)
+    }
+
     // MARK: - Audio Track Controls
     
     func getAudioTracks() -> [[String: Any]] {

modules/mpv-player/ios/MpvPlayerModule.swift

@@ -157,7 +157,19 @@ public class MpvPlayerModule: Module {
       AsyncFunction("setSubtitleFontSize") { (view: MpvPlayerView, size: Int) in
         view.setSubtitleFontSize(size)
       }
-      
+
+      AsyncFunction("setSubtitleBackgroundColor") { (view: MpvPlayerView, color: String) in
+        view.setSubtitleBackgroundColor(color)
+      }
+
+      AsyncFunction("setSubtitleBorderStyle") { (view: MpvPlayerView, style: String) in
+        view.setSubtitleBorderStyle(style)
+      }
+
+      AsyncFunction("setSubtitleAssOverride") { (view: MpvPlayerView, mode: String) in
+        view.setSubtitleAssOverride(mode)
+      }
+
       // Audio track functions
       AsyncFunction("getAudioTracks") { (view: MpvPlayerView) -> [[String: Any]] in
         return view.getAudioTracks()

modules/mpv-player/ios/MpvPlayerView.swift

@@ -319,6 +319,18 @@ class MpvPlayerView: ExpoView {
 		renderer?.setSubtitleFontSize(size)
 	}
 
+	func setSubtitleBackgroundColor(_ color: String) {
+		renderer?.setSubtitleBackgroundColor(color)
+	}
+
+	func setSubtitleBorderStyle(_ style: String) {
+		renderer?.setSubtitleBorderStyle(style)
+	}
+
+	func setSubtitleAssOverride(_ mode: String) {
+		renderer?.setSubtitleAssOverride(mode)
+	}
+
 	// MARK: - Video Scaling
 
 	func setZoomedToFill(_ zoomed: Bool) {

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

@@ -95,6 +95,11 @@ export interface MpvPlayerViewRef {
   setSubtitleAlignX: (alignment: "left" | "center" | "right") => Promise<void>;
   setSubtitleAlignY: (alignment: "top" | "center" | "bottom") => Promise<void>;
   setSubtitleFontSize: (size: number) => Promise<void>;
+  setSubtitleBackgroundColor: (color: string) => Promise<void>;
+  setSubtitleBorderStyle: (
+    style: "outline-and-shadow" | "background-box",
+  ) => Promise<void>;
+  setSubtitleAssOverride: (mode: "no" | "force") => Promise<void>;
   // Audio controls
   getAudioTracks: () => Promise<AudioTrack[]>;
   setAudioTrack: (trackId: number) => Promise<void>;

modules/mpv-player/src/MpvPlayerView.tsx

@@ -84,6 +84,17 @@ export default React.forwardRef<MpvPlayerViewRef, MpvPlayerViewProps>(
       setSubtitleFontSize: async (size: number) => {
         await nativeRef.current?.setSubtitleFontSize(size);
       },
+      setSubtitleBackgroundColor: async (color: string) => {
+        await nativeRef.current?.setSubtitleBackgroundColor(color);
+      },
+      setSubtitleBorderStyle: async (
+        style: "outline-and-shadow" | "background-box",
+      ) => {
+        await nativeRef.current?.setSubtitleBorderStyle(style);
+      },
+      setSubtitleAssOverride: async (mode: "no" | "force") => {
+        await nativeRef.current?.setSubtitleAssOverride(mode);
+      },
       // Audio controls
       getAudioTracks: async () => {
         return await nativeRef.current?.getAudioTracks();

translations/en.json

@@ -705,7 +705,8 @@
     "skip_credits": "Skip Credits",
     "stopPlayback": "Stop Playback",
     "stopPlayingTitle": "Stop playing \"{{title}}\"?",
-    "stopPlayingConfirm": "Are you sure you want to stop playback?"
+    "stopPlayingConfirm": "Are you sure you want to stop playback?",
+    "downloaded": "Downloaded"
   },
   "item_card": {
     "next_up": "Next Up",

translations/sv.json

@@ -678,7 +678,8 @@
     "skip_credits": "Hoppa över eftertexter",
     "stopPlayback": "Stoppa uppspelning",
     "stopPlayingTitle": "Sluta spela \"{{title}}\"?",
-    "stopPlayingConfirm": "Är du säker på att du vill stoppa uppspelningen?"
+    "stopPlayingConfirm": "Är du säker på att du vill stoppa uppspelningen?",
+    "downloaded": "Nedladdad"
   },
   "item_card": {
     "next_up": "Näst på tur",

utils/atoms/settings.ts

@@ -214,6 +214,8 @@ export type Settings = {
   mpvSubtitleAlignX?: "left" | "center" | "right";
   mpvSubtitleAlignY?: "top" | "center" | "bottom";
   mpvSubtitleFontSize?: number;
+  mpvSubtitleBackgroundEnabled?: boolean;
+  mpvSubtitleBackgroundOpacity?: number; // 0-100
   // MPV buffer/cache settings
   mpvCacheEnabled?: MpvCacheMode;
   mpvCacheSeconds?: number;
@@ -313,6 +315,8 @@ export const defaultValues: Settings = {
   mpvSubtitleAlignX: undefined,
   mpvSubtitleAlignY: undefined,
   mpvSubtitleFontSize: undefined,
+  mpvSubtitleBackgroundEnabled: false,
+  mpvSubtitleBackgroundOpacity: 75,
   // MPV buffer/cache defaults
   mpvCacheEnabled: "auto",
   mpvCacheSeconds: 10,