java opencv通过rtsp获取视频流，保存视频到本地

待我称王封你为后i 2023-06-23 13:30 18阅读 0赞

*      代码都是来自网络，收集的比较乱，所有找不到出处了。
        获取视频流的核心代码
        private static void testRtsp() {
            //必须要加入这两个东西
            System.load("D:\\opencv-4.1.1\\opencv\\build\\x64\\vc15\\bin\\opencv_world411.dll");
            System.load("D:\\opencv-4.1.1\\opencv\\build\\bin\\opencv_videoio_ffmpeg411_64.dll");
            VideoCapture vc = new VideoCapture();
            boolean isOpen = vc.open("rtsp://admin:admin@192.168.88.250");
        
            System.out.println("isOpen="+isOpen);
        
            Mat mat = new Mat();
            String winName = "showFrame";
            int height = 600,width = 800;
            HighGui.namedWindow(winName);
            HighGui.resizeWindow(winName, width, height);
            while(vc.read(mat)){
                // 重置大小
                Mat dst = new Mat();
                Imgproc.resize(mat, dst, new Size(width,height));
                // 显示
                HighGui.imshow(winName, dst);
                // waitkey 必须要，否则无法显示
                int key = HighGui.waitKey(1);
                System.out.println("key="+key);
                //esc键退出
                if(key == 27){
                    break;
                }
                //拿到了每帧之后要干嘛就是后面逻辑的事情了
            }
            HighGui.destroyAllWindows();
            vc.release();
        }
 *  `效果`![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L20wXzM3NTQ5MDUw_size_16_color_FFFFFF_t_70][]
 *  mat的一些处理方式

//mat转输入流
    public static InputStream mat2InputStream(Mat mat){
        MatOfByte mob = new MatOfByte();
        imencode(".jpg", mat, mob);
        byte[] byteArray = mob.toArray();
        return new ByteArrayInputStream(byteArray);
    }
    //mat转图片
    public static void mat2File(Mat mat){
        MatOfByte mob = new MatOfByte();
        imencode(".jpg", mat, mob);
        imwrite("f:\\img\\test.png",mat);
       // byte[] byteArray = mob.toArray();
    }

*  通过rtsp保存视频

private static void record(){
        System.load("D:\\opencv-4.1.1\\opencv\\build\\x64\\vc15\\bin\\opencv_world411.dll");
        System.load("D:\\opencv-4.1.1\\opencv\\build\\bin\\opencv_videoio_ffmpeg411_64.dll");
        VideoCapture vc = new VideoCapture();
        boolean isOpen = vc.open("rtsp://admin:ZPJadmin1@192.168.88.250");
        System.out.println("isOpen="+isOpen);
        Mat mat = new Mat();
        VideoWriter vw = new VideoWriter();
        Size size  = new Size();
        size.width = vc.get(CAP_PROP_FRAME_WIDTH);
        size.height = vc.get(CAP_PROP_FRAME_HEIGHT);
        boolean t = vw.open("f:\\img\\test.avi",VideoWriter.fourcc('M', 'P', '4', '2'),30,size);
        System.out.println("开启状态："+t);
        int times = 400;//测试录制时间
        while(times-->0 && vc.read(mat)){
            vw.write(mat);
            try {
                Thread.sleep(100);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }
        vc.release();
        vw.release();
        System.out.println("结束");
    }
    效果

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L20wXzM3NTQ5MDUw_size_16_color_FFFFFF_t_70]: https://img-blog.csdnimg.cn/20191219175234760.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L20wXzM3NTQ5MDUw,size_16,color_FFFFFF,t_70