#include "libavutil/opt.h"
#include "libavutil/pixdesc.h"
#include "libavutil/timestamp.h"
#include "libavutil/opt.h"
#include "libavutil/pixdesc.h"
#include "libavutil/timestamp.h"
int hsub, vsub; ///< chroma subsampling values
AVFrame *ref; ///< reference picture
int hsub, vsub; ///< chroma subsampling values
AVFrame *ref; ///< reference picture