Java视频截取封面图

/** * 视频截取封面图类 *  * @author hg * */public class VideosScreenshot {    // 用来产生随机验证码的    private static Random rand = new Random();    private static String[] str = { "0", "1", "2", "3", "4", "5", "6", "7", "8", "9" };    /**     *      * @param videourl 视频截图     * @param picurl 图片截图     * @return     */    public String vidpicirl(String videourl) {        System.err.println(videourl);        // 存放产生的随机数        StringBuffer sms;        // 生成三位数的随机数        StringBuffer buf = new StringBuffer();        for (int i = 0; i < 3; i++) {            buf.append(str[rand.nextInt(10)]);        }        sms = buf;        // 获取当前时间        Date now = new Date();        // 格式化字符        SimpleDateFormat date = new SimpleDateFormat("yyyy MM dd hh mm ss");        String datestring = date.format(now);        // 去除时间里的空格        String nokongge = datestring.replaceAll(" ", "");        String longid = nokongge + sms;        long randomid = new Long(Long.parseLong(longid));        String picurl = "E:\\Program Files\\Apache Software Foundation\\Tomcat 8.0\\webapps\\gatesskills\\updvids\\"                + randomid + ".jpg";//截图存放路径        //String picurl = "E:\\"+randomid+".jpg";        List<String> commend = new java.util.ArrayList<String>();        commend.add("E:\\ffmpeg.exe");//插件存放路径        commend.add("-i");        commend.add(videourl);        commend.add("-y");        commend.add("-f");        commend.add("image2");        commend.add("-ss");        commend.add("1");        commend.add("-t");        commend.add("0.001");        commend.add("-s");        commend.add("350*240");        commend.add(picurl);        try {            ProcessBuilder builder = new ProcessBuilder();            builder.command(commend);            builder.redirectErrorStream(true);            System.out.println("视频截图开始...");            // builder.start();            Process process = builder.start();            InputStream in = process.getInputStream();            byte[] re = new byte[1024];            System.out.print("正在进行截图，请稍候");            while (in.read(re) != -1) {                System.out.print(".");            }            System.out.println("");            in.close();            System.err.println("视频截图完成...");            System.err.println("视频截图url:"+picurl);        } catch (Exception e) {            e.printStackTrace();            System.out.println("视频截图失败！");        }        return picurl;    }