int read_frame_header(char *path);
int read_frame(VFrame *frame, VFrame *data);
int64_t get_memory_usage();
int read_frame_header(char *path);
int read_frame(VFrame *frame, VFrame *data);
int64_t get_memory_usage();
int write_frame(VFrame *frame, VFrame *data, FrameWriterUnit *unit);
FrameWriterUnit* new_writer_unit(FrameWriter *writer);
int write_frame(VFrame *frame, VFrame *data, FrameWriterUnit *unit);
FrameWriterUnit* new_writer_unit(FrameWriter *writer);