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Add extra movflags to fMP4 to take initial audio delay into account

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Signed-off-by: nyanmisaka <nst799610810@gmail.com>
This commit is contained in:
nyanmisaka 2025-07-30 18:00:14 +08:00
parent 76d498ac9d
commit a5b4eca804
1 changed files with 7 additions and 2 deletions
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9
Jellyfin.Api/Controllers/DynamicHlsController.cs
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@ -46,6 +46,7 @@ public class DynamicHlsController : BaseJellyfinApiController
private readonly Version _minFFmpegFlacInMp4 = new Version(6, 0);
private readonly Version _minFFmpegX265BframeInFmp4 = new Version(7, 0, 1);
private readonly Version _minFFmpegHlsSegmentOptions = new Version(5, 0);
private readonly ILibraryManager _libraryManager;
private readonly IUserManager _userManager;
@ -1606,6 +1607,7 @@ public class DynamicHlsController : BaseJellyfinApiController
var segmentFormat = string.Empty;
var segmentContainer = outputExtension.TrimStart('.');
var inputModifier = _encodingHelper.GetInputModifier(state, _encodingOptions, segmentContainer);
var hlsArguments = $"-hls_playlist_type {(isEventPlaylist ? "event" : "vod")} -hls_list_size 0";
if (string.Equals(segmentContainer, "ts", StringComparison.OrdinalIgnoreCase))
{
@ -1621,6 +1623,11 @@ public class DynamicHlsController : BaseJellyfinApiController
false => " -hls_fmp4_init_filename \"" + outputFileNameWithoutExtension + "-1" + outputExtension + "\""
};
var useLegacySegmentOption = _mediaEncoder.EncoderVersion < _minFFmpegHlsSegmentOptions;
// fMP4 needs this flag to write the audio packet DTS/PTS including the initial delay into MOOF::TRAF::TFDT
hlsArguments += $" {(useLegacySegmentOption ? "-hls_ts_options" : "-hls_segment_options")} movflags=+frag_discont";
segmentFormat = "fmp4" + outputFmp4HeaderArg;
}
else
@ -1642,8 +1649,6 @@ public class DynamicHlsController : BaseJellyfinApiController
Path.GetFileNameWithoutExtension(outputPath));
}
var hlsArguments = $"-hls_playlist_type {(isEventPlaylist ? "event" : "vod")} -hls_list_size 0";
return string.Format(
CultureInfo.InvariantCulture,
"{0} {1} -map_metadata -1 -map_chapters -1 -threads {2} {3} {4} {5} -copyts -avoid_negative_ts disabled -max_muxing_queue_size {6} -f hls -max_delay 5000000 -hls_time {7} -hls_segment_type {8} -start_number {9}{10} -hls_segment_filename \"{11}\" {12} -y \"{13}\"",