依赖

        <dependency><groupId>org.bytedeco</groupId><artifactId>javacv-platform</artifactId><version>1.5.9</version></dependency>

传入视频流获取图片byte

    /*** 获取视频截图** @param frameNumber 视频的指定帧数* @param vName       视频名称* @param videoBytes  视频字节* @return 图片byte数组*/private byte[] getCoverImageBytes(Integer frameNumber, String vName, byte[] videoBytes) {Double videoSize = DoubleUtil.getDouble2(videoBytes.length / 1024.0 / 1024.0);long timeMillis = System.currentTimeMillis();logger.info("截取视频截图开始 视频名称:{} 视频大小:{}MB", vName, videoSize);try (ByteArrayInputStream is = new ByteArrayInputStream(videoBytes);FFmpegFrameGrabber grabber = new FFmpegFrameGrabber(is);ByteArrayOutputStream os = new ByteArrayOutputStream();Java2DFrameConverter converter = new Java2DFrameConverter()) {grabber.start();//视频的最大帧数，减少10帧是因为最后几帧会出现获取不到图片的情况int ftp = grabber.getLengthInFrames() - 10;frameNumber = ftp < frameNumber ? ftp : frameNumber;//设置视频指定帧数grabber.setFrameNumber(frameNumber);//设置视频截取帧（默认取第一帧）Frame frame = grabber.grabImage();//绘制图片BufferedImage bi = converter.getBufferedImage(frame);ImageIO.write(bi, "jpg", os);grabber.stop();logger.info("截取视频截图结束,处理时间: {}秒", (System.currentTimeMillis() - timeMillis) / 1000);return os.toByteArray();} catch (FrameGrabber.Exception e) {logger.error("FrameGrabber.Exception :{}", e.getMessage());} catch (IOException e) {logger.error("IOException :{}", e.getMessage());}logger.info("获取视频封面图失败 vName:{}", vName);return null;}

传入视频流获取图片文件

/*** 传入视频文件，生成对应的封面图文件** @param frameNumber 帧数* @param file        视频文件*/private void coverImage(Integer frameNumber, File file) {String vName = file.getName();Double videoSize = DoubleUtil.getDouble2(file.length() / 1024.0 / 1024.0);long timeMillis = System.currentTimeMillis();logger.info("截取视频截图开始 视频名称:{} 视频大小:{}MB", vName, videoSize);try (FileInputStream is = new FileInputStream(file);FFmpegFrameGrabber grabber = new FFmpegFrameGrabber(is);Java2DFrameConverter converter = new Java2DFrameConverter()) {grabber.start();//视频的最大帧数，减少10帧是因为最后几帧会出现获取不到图片的情况int ftp = grabber.getLengthInFrames() - 10;frameNumber = ftp < frameNumber ? ftp : frameNumber;//设置视频指定帧数grabber.setFrameNumber(frameNumber);// 图片名称String targetFileName = vName.substring(0, vName.lastIndexOf(".")) + "_vc.jpg";logger.info("图片名称：{}", targetFileName);File imageFile = new File("D:\\my_work\\" + targetFileName);//设置视频截取帧（默认取第一帧）Frame frame = grabber.grabImage();//绘制图片BufferedImage bi = converter.getBufferedImage(frame);ImageIO.write(bi, "jpg", imageFile);grabber.stop();logger.info("截取视频截图结束,处理时间: {}秒", (System.currentTimeMillis() - timeMillis) / 1000);} catch (FrameGrabber.Exception e) {logger.error("FrameGrabber.Exception :{}", e.getMessage());} catch (IOException e) {logger.error("IOException :{}", e.getMessage());}