视频直播系统源码，使用javacv截图某一帧效率太慢解决办法

<dependency>
            <groupId>org.bytedeco</groupId>
            <artifactId>javacv-platform</artifactId>
            <version>1.4.1</version>
</dependency>


/*
     * @Description: 根据视频的某一帧截图
     * @fileInputPath 原视频路径
     * @frame 要截取的那一帧
     * @fileOutPath 截图存放路径
     * @return void
     * @date 2019/2/14 11:12 AM
     */
    public static void screenshots(String fileInputPath,int frame,String fileOutPath){
        try {
            FFmpegFrameGrabber ff = FFmpegFrameGrabber.createDefault(fileInputPath);
            ff.start();
            Frame f;
            //跳转到需要截图到那一帧
            ff.setFrameNumber(frame);
            f = ff.grabImage();
            doExecuteFrame(f, fileOutPath);
            ff.stop();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
    public static void doExecuteFrame(Frame f, String targerFilePath) {
        String imagemat = "jpg";
        if (null == f || null == f.image) {
            return;
        }
        Java2DFrameConverter converter = new Java2DFrameConverter();
        BufferedImage bi = converter.getBufferedImage(f);
        File output = new File(targerFilePath);
        try {
            ImageIO.write(bi, imagemat, output);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
 

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