int write_frame(VFrame *frame, VFrame *data, FrameWriterUnit *unit);
int can_copy_from(Asset *asset, int64_t position);
int read_frame_header(char *path);
+ static int read_header(FILE *fp, int &w, int &h);
FrameWriterUnit* new_writer_unit(FrameWriter *writer);
void *decompressor;