shared_ptr<const Film> film = _film.lock ();
DCPOMATIC_ASSERT (film);
FrameRateChange const frc (video_frame_rate (), film->video_frame_rate ());
shared_ptr<const Film> film = _film.lock ();
DCPOMATIC_ASSERT (film);
FrameRateChange const frc (video_frame_rate (), film->video_frame_rate ());