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@ -49,13 +49,12 @@ namespace Jellyfin.MediaEncoding.Hls.Playlist
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/// <inheritdoc />
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public string CreateMainPlaylist(CreateMainPlaylistRequest request)
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{
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IReadOnlyList<double> segments = Array.Empty<double>();
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if (IsExtractionAllowedForFile(request.FilePath))
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IReadOnlyList<double> segments;
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if (TryExtractKeyframes(request.FilePath, out var keyframeData))
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{
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segments = ComputeSegments(request.FilePath, request.DesiredSegmentLengthMs);
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segments = ComputeSegments(keyframeData, request.DesiredSegmentLengthMs);
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}
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if (segments.Count == 0)
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else
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{
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segments = ComputeEqualLengthSegments(request.DesiredSegmentLengthMs, request.TotalRuntimeTicks);
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}
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@ -115,9 +114,14 @@ namespace Jellyfin.MediaEncoding.Hls.Playlist
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return builder.ToString();
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}
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private IReadOnlyList<double> ComputeSegments(string filePath, int desiredSegmentLengthMs)
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private bool TryExtractKeyframes(string filePath, [NotNullWhen(true)] out KeyframeData? keyframeData)
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{
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KeyframeData keyframeData;
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keyframeData = null;
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if (!IsExtractionAllowedForFile(filePath, _serverConfigurationManager.GetEncodingOptions().AllowAutomaticKeyframeExtractionForExtensions))
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{
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return false;
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}
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var cachePath = GetCachePath(filePath);
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if (TryReadFromCache(cachePath, out var cachedResult))
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{
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@ -132,31 +136,13 @@ namespace Jellyfin.MediaEncoding.Hls.Playlist
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catch (Exception ex)
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{
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_logger.LogError(ex, "Keyframe extraction failed for path {FilePath}", filePath);
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return Array.Empty<double>();
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return false;
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}
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CacheResult(cachePath, keyframeData);
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}
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long lastKeyframe = 0;
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var result = new List<double>();
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// Scale the segment length to ticks to match the keyframes
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var desiredSegmentLengthTicks = TimeSpan.FromMilliseconds(desiredSegmentLengthMs).Ticks;
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var desiredCutTime = desiredSegmentLengthTicks;
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for (var j = 0; j < keyframeData.KeyframeTicks.Count; j++)
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{
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var keyframe = keyframeData.KeyframeTicks[j];
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if (keyframe >= desiredCutTime)
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{
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var currentSegmentLength = keyframe - lastKeyframe;
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result.Add(TimeSpan.FromTicks(currentSegmentLength).TotalSeconds);
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lastKeyframe = keyframe;
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desiredCutTime += desiredSegmentLengthTicks;
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}
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}
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result.Add(TimeSpan.FromTicks(keyframeData.TotalDuration - lastKeyframe).TotalSeconds);
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return result;
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return keyframeData.KeyframeTicks.Count > 0;
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}
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private void CacheResult(string cachePath, KeyframeData keyframeData)
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@ -188,11 +174,10 @@ namespace Jellyfin.MediaEncoding.Hls.Playlist
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return false;
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}
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private bool IsExtractionAllowedForFile(ReadOnlySpan<char> filePath)
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internal static bool IsExtractionAllowedForFile(ReadOnlySpan<char> filePath, string[] allowedExtensions)
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{
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// Remove the leading dot
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var extension = Path.GetExtension(filePath)[1..];
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var allowedExtensions = _serverConfigurationManager.GetEncodingOptions().AllowAutomaticKeyframeExtractionForExtensions;
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for (var i = 0; i < allowedExtensions.Length; i++)
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{
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var allowedExtension = allowedExtensions[i];
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@ -205,7 +190,30 @@ namespace Jellyfin.MediaEncoding.Hls.Playlist
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return false;
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}
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private static double[] ComputeEqualLengthSegments(long desiredSegmentLengthMs, long totalRuntimeTicks)
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internal static IReadOnlyList<double> ComputeSegments(KeyframeData keyframeData, int desiredSegmentLengthMs)
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{
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long lastKeyframe = 0;
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var result = new List<double>();
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// Scale the segment length to ticks to match the keyframes
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var desiredSegmentLengthTicks = TimeSpan.FromMilliseconds(desiredSegmentLengthMs).Ticks;
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var desiredCutTime = desiredSegmentLengthTicks;
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for (var j = 0; j < keyframeData.KeyframeTicks.Count; j++)
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{
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var keyframe = keyframeData.KeyframeTicks[j];
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if (keyframe >= desiredCutTime)
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{
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var currentSegmentLength = keyframe - lastKeyframe;
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result.Add(TimeSpan.FromTicks(currentSegmentLength).TotalSeconds);
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lastKeyframe = keyframe;
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desiredCutTime += desiredSegmentLengthTicks;
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}
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}
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result.Add(TimeSpan.FromTicks(keyframeData.TotalDuration - lastKeyframe).TotalSeconds);
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return result;
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}
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internal static double[] ComputeEqualLengthSegments(long desiredSegmentLengthMs, long totalRuntimeTicks)
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{
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var segmentLengthTicks = TimeSpan.FromMilliseconds(desiredSegmentLengthMs).Ticks;
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var wholeSegments = totalRuntimeTicks / segmentLengthTicks;
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