- FrameRateChange const frc (active_video_frame_rate(), film()->video_frame_rate());
- return DCPTime::from_frames (llrint (_length * frc.factor()), film()->video_frame_rate());
+ FrameRateChange const frc (film, shared_from_this());
+ return DCPTime::from_frames (llrint (_length * frc.factor()), film->video_frame_rate());
+}
+
+DCPTime
+AtmosMXFContent::approximate_length () const
+{
+ return DCPTime::from_frames (_length, 24);