typedef std::list<VideoImageFrame*> VideoFrames;
VideoFrames video_frames;
VideoImageFrame *get_video_frame (framepos_t vfn, int cut=0, int rightend = -1);
typedef std::list<VideoImageFrame*> VideoFrames;
VideoFrames video_frames;
VideoImageFrame *get_video_frame (framepos_t vfn, int cut=0, int rightend = -1);