使用OpenCV和gstreamer编写MP4文件，可在web浏览器（firefox/opera）中打开

我正在尝试从IPCamera接收视频流，并希望编写可以在firefox/bouser中打开的视频mp4

以下工作将被罚款：

  gst-launch-1.0 -e rtspsrc location = rtsp://.... ! decodebin ! x264enc ! mp4mux ! filesink location=file.mp4$

这个（file.mp4）文件我可以在firefox中打开

但当我从opencv写入文件时，我得到的是mp4视频文件，我可以在vlc中打开，但不能在brouser/firefox中打开：

    int main()
    {
        const char* gst = "rtspsrc location = rtsp://<ipcamera>  latency=0  ! rtph264depay ! avdec_h264 ! videoconvert ! appsink";
        const char*  gst_writer = "appsrc ! autovideoconvert ! x264enc ! mp4mux ! filesink location=test.mp4";
        cv::VideoCapture cap(gst);
        if (!cap.isOpened()) {
            std::cout << "Failed to open camera." << std::endl;
            return (-1);
        }
        unsigned int width = cap.get(CV_CAP_PROP_FRAME_WIDTH);
        unsigned int height = cap.get(CV_CAP_PROP_FRAME_HEIGHT);
        unsigned int fps = cap.get(CV_CAP_PROP_FPS);
        unsigned int pixels = width * height;
        std::cout << " Frame size : " << width << " x " << height << ", " << pixels << " Pixels " << fps << " FPS" << std::endl;
        cv::VideoWriter writer(gst_writer, cap.get(CV_CAP_PROP_FOURCC), fps, cv::Size(width, height));
        if (!writer.isOpened()) {
            std::cout << "Failed to open writer." << std::endl;
            return (-2);
        }

        cv::Mat frame_in;
        while (1)
        {
            if (!cap.read(frame_in)) {
                std::cout << "Capture read error" << std::endl;
                break;
            }
            else {
                writer.write(frame_in);
            }
            cv::imshow("webCamera", frame_in);
            char c = (char)cv::waitKey(10);
            if (c == 27 || c == 'q' || c == 'Q')//ESC
                break;

        }
        cap.release();
        writer.release();
        return 0;
    }

intmain（）
{
const char*gst=“rtspsrc location=rtsp://latency=0！rtph264depay！avdec_h264！videoconvert！appsink”；
const char*gst\u writer=“appsrc！autovideoconvert！x264enc！mp4mux！filesink location=test.mp4”；
cv：：视频捕获上限（gst）；
如果（！cap.isOpened（））{
std:：cout发生了什么错误？您知道
mp4mux
的
faststart
选项吗？对不起，我以为Gstreamer文件引起了麻烦。。