WebSocket整合直播

由于浏览器不支持对于rtmp协议推拉流，所以需要后台对传输的数据进行处理，将数据转接，为了实现其实时性，使用websocket将数据传输

先使用obs和vlc测试正常的推拉流是否正常

然后在跑本地后台传输视频

使用JavaCV技术传输音视频

java 复制代码

        //创建+设置采集器
        FFmpegFrameGrabber grabber = FFmpegFrameGrabber.createDefault(inputPath);
        grabber.setOption("rtsp_transport", "tcp");
        grabber.setImageWidth(960);
        grabber.setImageHeight(540);

        //开启采集器
        grabber.start();

        //直播播放窗口
        CanvasFrame canvasFrame = new CanvasFrame("直播------来自"+inputPath);
        canvasFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        canvasFrame.setAlwaysOnTop(true);
        OpenCVFrameConverter.ToMat converter = new OpenCVFrameConverter.ToMat();

        //播流
        while (true){
            Frame frame = grabber.grabImage();  //拉流
            opencv_core.Mat mat = converter.convertToMat(frame);
            canvasFrame.showImage(frame);   //播放
        }

测试时正常显示页面

对音视频解析转为二进制流传递给前端

java 复制代码

//读取rtmp文件流
        // 获取视频源
        log.info("音频流地址{}",url);
        FFmpegFrameGrabber grabber = new FFmpegFrameGrabber(url);
        try {
            grabber.start();
            Frame frame = null;
            long startTime = System.currentTimeMillis();
            ByteArrayOutputStream wavBuffer = new ByteArrayOutputStream();
            while ((frame = grabber.grabFrame()) != null) {
                log.info("解流");
                Buffer[] samples = frame.samples;
                int sampleRate = frame.sampleRate;
                int audioChannels = frame.audioChannels;
                int sampleSizeInBit = 16;
                //一秒数据量
                Thread.sleep(1000);
                int oneSecondBytes = sampleRate * sampleSizeInBit / 2 * audioChannels;

                Java2DFrameConverter converter = new Java2DFrameConverter();
                BufferedImage image=converter.convert(frame);
                ByteArrayOutputStream baos = new ByteArrayOutputStream();
                ImageIO.write(image, "jpg", baos);
                byte[] imageData = baos.toByteArray();
                webSocketService.sendBroadcast(imageData);

设置1秒时长的延迟，防止服务器因为拉流崩溃