ffmpeg把h264 I帧转为jpg图片

最新推荐文章于 2023-10-17 20:46:51 发布

codeshawn

最新推荐文章于 2023-10-17 20:46:51 发布

阅读量4.7k

点赞数 2

本文链接：https://blog.youkuaiyun.com/u012175394/article/details/89394761

版权

int capture(unsigned char* sps, unsigned int spsLen, unsigned char* pps, unsigned int ppsLen, unsigned char* IFrame, unsigned int IFrameLen, const char* imageFileName)
{
std::string tempFile = imageFileName+ "_temp";

FILE* fp = fopen(tempFile.c_str(), "wb");
char h264FrameHead[4] = {0x00, 0x00, 0x00, 0x01};

fwrite(h264FrameHead, 4, 1, fp);
fwrite(sps, spsLen, 1, fp);

fwrite(h264FrameHead, 4, 1, fp);
fwrite(pps, ppsLen, 1, fp);

    fwrite(h264FrameHead, 4, 1, fp);
    fwrite(IFrame, IFrameLen, 1, fp);
    fflush(fp);
    fclose(fp);

    char cmd[256];
    memset(cmd,0,256);
    snprintf(cmd,256,"/opt/mediaserver/bin/ffmpeg -i %s -y -ss 00:00:00 -vframes 1 %s>/dev/null", tempFile.c_str(), imageName.c_str());
    system(cmd);
    remove(tempFile.c_str());
}