- boost::shared_ptr<Player> make_player () const;
- boost::shared_ptr<Playlist> playlist () const;
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- OutputAudioFrame audio_frame_rate () const;
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- OutputAudioFrame time_to_audio_frames (Time) const;
- OutputVideoFrame time_to_video_frames (Time) const;
- Time video_frames_to_time (OutputVideoFrame) const;
- Time audio_frames_to_time (OutputAudioFrame) const;