int use_path() { return 1; }
int read_frame(VFrame *output, char *path);
int write_frame(VFrame *frame, VFrame *data, FrameWriterUnit *unit);
int use_path() { return 1; }
int read_frame(VFrame *output, char *path);
int write_frame(VFrame *frame, VFrame *data, FrameWriterUnit *unit);