//必须加以下内容,否则编译不能通过,为了兼容C和C99标准
#ifndef INT64_C
#define INT64_C
#define UINT64_C
#endif

//引入ffmpeg头文件
extern "C" {
#include "libavutil/opt.h"
#include "libavutil/time.h"
#include "libavutil/frame.h"
#include "libavutil/pixdesc.h"
#include "libavutil/avassert.h"
#include "libavutil/imgutils.h"
#include "libavutil/ffversion.h"
#include "libavcodec/avcodec.h"
#include "libswscale/swscale.h"
#include "libavformat/avformat.h"
#include "libavfilter/avfilter.h"

#ifdef ffmpegdevice
#include "libavdevice/avdevice.h"
#endif

#ifndef gcc45
#include "libavutil/hwcontext.h"
#include "libavutil/hwcontext_qsv.h"
#endif
}