+ 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 & sub);
+ static std::string subtitle_id (AVSubtitle const & sub);
+ static bool subtitle_starts_image (AVSubtitle const & sub);
+