wait_for_jobs ();
BOOST_CHECK_EQUAL (A->video_length_after_3d_combine(), 16);
shared_ptr<FFmpegContent> B (new FFmpegContent (film, "test/data/red_30.mp4"));
wait_for_jobs ();
BOOST_CHECK_EQUAL (A->video_length_after_3d_combine(), 16);
shared_ptr<FFmpegContent> B (new FFmpegContent (film, "test/data/red_30.mp4"));