From 5045c2e4488bf60965b1f5f4893a3539bd7c3da0 Mon Sep 17 00:00:00 2001 From: IceStormNG Date: Wed, 28 Jan 2026 12:11:24 -0500 Subject: [PATCH] Backport pull request #16053 from jellyfin/release-10.11.z Fix HLS playlist generation for transcodes with fractional framerate Original-merge: 893a849f28b651657b3797d1711da8f696b4120c Merged-by: crobibero Backported-by: Bond_009 --- Jellyfin.Api/Controllers/DynamicHlsController.cs | 12 +++++++++++- 1 file changed, 11 insertions(+), 1 deletion(-) diff --git a/Jellyfin.Api/Controllers/DynamicHlsController.cs b/Jellyfin.Api/Controllers/DynamicHlsController.cs index 15b04051f4..f80b36c390 100644 --- a/Jellyfin.Api/Controllers/DynamicHlsController.cs +++ b/Jellyfin.Api/Controllers/DynamicHlsController.cs @@ -1400,10 +1400,20 @@ public class DynamicHlsController : BaseJellyfinApiController cancellationTokenSource.Token) .ConfigureAwait(false); var mediaSourceId = state.BaseRequest.MediaSourceId; + double fps = state.TargetFramerate ?? 0.0f; + int segmentLength = state.SegmentLength * 1000; + + // If framerate is fractional (i.e. 23.976), we need to slightly adjust segment length + if (Math.Abs(fps - Math.Floor(fps + 0.001f)) > 0.001) + { + double nearestIntFramerate = Math.Ceiling(fps); + segmentLength = (int)Math.Ceiling(segmentLength * (nearestIntFramerate / fps)); + } + var request = new CreateMainPlaylistRequest( mediaSourceId is null ? null : Guid.Parse(mediaSourceId), state.MediaPath, - state.SegmentLength * 1000, + segmentLength, state.RunTimeTicks ?? 0, state.Request.SegmentContainer ?? string.Empty, "hls1/main/",