boost::optional<double> video_frame_rate () const;
dcp::Size video_size () const;
Frame video_length () const;
boost::optional<double> sample_aspect_ratio () const;
bool yuv () const;
boost::optional<double> video_frame_rate () const;
dcp::Size video_size () const;
Frame video_length () const;
boost::optional<double> sample_aspect_ratio () const;
bool yuv () const;