Fix problems with subtitles when there is a non-zero PTS offset

in FFmpegDecoder.  This offset was not being taken into account for
subtitles prior to this commit.

1 files changed, 5 insertions, 0 deletions

diff --git a/src/lib/ffmpeg.h b/src/lib/ffmpeg.h
index 961f5cbb1..b3bc13e5c 100644
--- a/src/lib/ffmpeg.h
+++ b/src/lib/ffmpeg.h
@@ -33,6 +33,7 @@ struct AVFrame;
 struct AVIOContext;
 
 class FFmpegContent;
+class FFmpegAudioStream;
 class Log;
 
 class FFmpeg
@@ -51,6 +52,10 @@ public:
 protected:
 	AVCodecContext* video_codec_context () const;
 	AVCodecContext* subtitle_codec_context () const;
+	ContentTime pts_offset (
+		std::vector<boost::shared_ptr<FFmpegAudioStream> > audio_streams, boost::optional<ContentTime> first_video, double video_frame_rate
+		) const;
+
 	static FFmpegSubtitlePeriod subtitle_period (AVSubtitle const &);
 
 	boost::shared_ptr<const FFmpegContent> _ffmpeg_content;