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Add TranscodingSegmentCleaner to replace ffmpeg's hlsenc deletion

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FFmpeg deletes segments based on its own transcoding progress,
but we need to delete segments based on client download progress.
Since disk and GPU speeds vary, using hlsenc's built-in deletion
will result in premature deletion of some segments. As a consequence,
the server has to constantly respin new ffmpeg instances, resulting
in choppy video playback.

Signed-off-by: nyanmisaka <nst799610810@gmail.com>
This commit is contained in:
nyanmisaka 2024-03-16 03:40:14 +08:00
parent 1e964c9bc2
commit eca9bf41bc
4 changed files with 214 additions and 28 deletions
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17
MediaBrowser.MediaEncoding/Transcoding/TranscodeManager.cs
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@ -546,6 +546,7 @@ public sealed class TranscodeManager : ITranscodeManager, IDisposable
if (!transcodingJob.HasExited)
{
StartThrottler(state, transcodingJob);
StartSegmentCleaner(state, transcodingJob);
}
else if (transcodingJob.ExitCode != 0)
{
@ -573,6 +574,22 @@ public sealed class TranscodeManager : ITranscodeManager, IDisposable
&& state.IsInputVideo
&& state.VideoType == VideoType.VideoFile;
private void StartSegmentCleaner(StreamState state, TranscodingJob transcodingJob)
{
if (EnableSegmentCleaning(state))
{
transcodingJob.TranscodingSegmentCleaner = new TranscodingSegmentCleaner(transcodingJob, _loggerFactory.CreateLogger<TranscodingSegmentCleaner>(), _serverConfigurationManager, _fileSystem, _mediaEncoder, state.SegmentLength);
transcodingJob.TranscodingSegmentCleaner.Start();
}
}
private static bool EnableSegmentCleaning(StreamState state)
=> state.InputProtocol is MediaProtocol.File or MediaProtocol.Http
&& state.IsInputVideo
&& state.TranscodingType == TranscodingJobType.Hls
&& state.RunTimeTicks.HasValue
&& state.RunTimeTicks.Value >= TimeSpan.FromMinutes(5).Ticks;
private TranscodingJob OnTranscodeBeginning(
string path,
string? playSessionId,