SeekableByteArrayOutputStream cannot be played

version: 1.5.10

public static void main(String[] args) throws IOException {
        String filePath="C:\\Users\\ferrym\\Desktop\\scrm\\surmount\\video-watermark\\lron-man.mp4";
        File file=new File(filePath);
        // 启用 FFmpeg 日志输出
        FFmpegLogCallback.set();
        //抓取视频资源
        FFmpegFrameGrabber frameGrabber = new FFmpegFrameGrabber(file);



        //
        Frame frame = null;
        FFmpegFrameRecorder recorder = null;
        String fileName = null;
        SeekableByteArrayOutputStream outputStream  = new SeekableByteArrayOutputStream();
        try{
            frameGrabber.start();
            Random random=new Random();
            fileName = file.getAbsolutePath() + random.nextInt(100)+".mp4";
            System.out.println("文件名-->>"+fileName);
            recorder = new FFmpegFrameRecorder(outputStream, frameGrabber.getImageWidth(), frameGrabber.getImageHeight(), frameGrabber.getAudioChannels());
            recorder.setFormat("mp4");
            recorder.setSampleRate(frameGrabber.getSampleRate());
            recorder.setFrameRate(frameGrabber.getFrameRate());
            recorder.setTimestamp(frameGrabber.getTimestamp());
            recorder.setVideoBitrate(frameGrabber.getVideoBitrate());
            recorder.setVideoCodec(frameGrabber.getVideoCodec());
            recorder.start();
            int index=0;
            while (true){
                frame=frameGrabber.grabFrame();
                if(frame==null){
                    System.out.println("视频处理完成");
                    break;
                }
                //判断音频
                System.out.println("音频=="+(frame.samples ==null)+"视频=="+ (frame.image==null));
                //判断图片帧
                if(frame.image !=null){
                    IplImage iplImage = Java2DFrameUtils.toIplImage(frame);
                    BufferedImage buffImg= Java2DFrameUtils.toBufferedImage(iplImage);
                    Graphics2D graphics = buffImg.createGraphics();
                    graphics.setColor(Color.WHITE);
                    graphics.setFont(new Font("微软雅黑", Font.BOLD, 20));
                    graphics.drawString("------------scrm技术团队--------------",(iplImage.width()/2)-100,iplImage.height()/2);
                    graphics.dispose();
                    Frame newFrame = Java2DFrameUtils.toFrame(buffImg);
                    recorder.record(newFrame);
                }
                //设置音频
                if(frame.samples !=null){
                    recorder.recordSamples(frame.sampleRate,frame.audioChannels,frame.samples);
                }
                System.out.println("帧值="+index);
                index ++;
            }


          File test =  new File(fileName);
            FileUtil.writeBytes(outputStream.toByteArray(),test);
//            writeBytesToFile(outputStream.toByteArray(),test);

            recorder.close();
            frameGrabber.close();
//            tempFile.delete();
//            FileUtil.delete(fileName);
        }catch (Exception e){
            e.printStackTrace();
        }
    }