content->audio->set_fade_in(dcpomatic::ContentTime::from_frames(2000, 48000));
content->audio->set_fade_out(dcpomatic::ContentTime::from_frames(1000, 48000));
content->audio->set_fade_in(dcpomatic::ContentTime::from_frames(2000, 48000));
content->audio->set_fade_out(dcpomatic::ContentTime::from_frames(1000, 48000));