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Diffstat (limited to 'MediaBrowser.Controller/MediaEncoding/EncodingHelper.cs')
| -rw-r--r-- | MediaBrowser.Controller/MediaEncoding/EncodingHelper.cs | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/MediaBrowser.Controller/MediaEncoding/EncodingHelper.cs b/MediaBrowser.Controller/MediaEncoding/EncodingHelper.cs index d6907fdf9..49c208b77 100644 --- a/MediaBrowser.Controller/MediaEncoding/EncodingHelper.cs +++ b/MediaBrowser.Controller/MediaEncoding/EncodingHelper.cs @@ -2771,7 +2771,13 @@ namespace MediaBrowser.Controller.MediaEncoding if (time > 0) { - seekParam += string.Format(CultureInfo.InvariantCulture, "-ss {0}", _mediaEncoder.GetTimeParameter(time)); + // For direct streaming/remuxing, we seek at the exact position of the keyframe + // However, ffmpeg will seek to previous keyframe when the exact time is the input + // Workaround this by adding 0.5s offset to the seeking time to get the exact keyframe on most videos. + // This will help subtitle syncing. + var isHlsRemuxing = state.IsVideoRequest && state.TranscodingType is TranscodingJobType.Hls && IsCopyCodec(state.OutputVideoCodec); + var seekTick = isHlsRemuxing ? time + 5000000L : time; + seekParam += string.Format(CultureInfo.InvariantCulture, "-ss {0}", _mediaEncoder.GetTimeParameter(seekTick)); if (state.IsVideoRequest) { |