opencv解析海康威视摄像头问题

1.opencv 3+ffmpeg 3:

cv::VideoCapture capture;
capture.open("rtsp://admin:123344@199.168.1.100:554/h264/ch1/sub/av_stream?udp");

cv::Mat frame;

if (!capture.isOpened()) {
    return 0;
}
capture >> frame;

while (cv::waitKey(1)!='q')
{

    capture >> frame;

            .......
    }



    错误：

    ![图片说明](https://img-ask.csdn.net/upload/201906/15/1560584595_388760.png)

提示信息是cbp太大，换解码器，或者调整视频源的视频格式/码率。