diff options
Diffstat (limited to 'MediaBrowser.Controller/MediaEncoding/EncodingHelper.cs')
| -rw-r--r-- | MediaBrowser.Controller/MediaEncoding/EncodingHelper.cs | 15 |
1 files changed, 13 insertions, 2 deletions
diff --git a/MediaBrowser.Controller/MediaEncoding/EncodingHelper.cs b/MediaBrowser.Controller/MediaEncoding/EncodingHelper.cs index 1fdb5fd4bd..40bb3913e9 100644 --- a/MediaBrowser.Controller/MediaEncoding/EncodingHelper.cs +++ b/MediaBrowser.Controller/MediaEncoding/EncodingHelper.cs @@ -3104,8 +3104,19 @@ namespace MediaBrowser.Controller.MediaEncoding { if (state.SubtitleStream.IsExternal) { - // External subtitle file is added as second FFmpeg input - args += " -map 1:0"; + // External subtitle file is added as second FFmpeg input. + // For single-stream files (SRT/ASS/VTT) the in-file index is always 0. + // For multi-stream containers (MKS) we count how many streams from + // the same file appear before the selected one. + var inFileIndex = state.MediaSource.MediaStreams + .Where(s => string.Equals(s.Path, state.SubtitleStream.Path, StringComparison.Ordinal)) + .TakeWhile(s => s.Index != state.SubtitleStream.Index) + .Count(); + + args += string.Format( + CultureInfo.InvariantCulture, + " -map 1:{0}", + inFileIndex); } else { |