void decode_subtitle_packet ();
void decode_bitmap_subtitle (AVSubtitleRect const * rect, ContentTimePeriod period);
void decode_subtitle_packet ();
void decode_bitmap_subtitle (AVSubtitleRect const * rect, ContentTimePeriod period);
std::list<ContentTimePeriod> image_subtitles_during (ContentTimePeriod, bool starting) const;
std::list<ContentTimePeriod> text_subtitles_during (ContentTimePeriod, bool starting) const;
std::list<ContentTimePeriod> image_subtitles_during (ContentTimePeriod, bool starting) const;
std::list<ContentTimePeriod> text_subtitles_during (ContentTimePeriod, bool starting) const;