javacv视频抽帧的实现过程详解（附代码）

  /**
   * 视频文件指定时间段的帧截取
   * @param file
   * @param start
   * @param end
   */
  public static List<File> videoIntercept(File file, Integer start, Integer end) {
    Frame frame = null;
    List<File> files = Lists.newArrayList();
    FFmpegFrameGrabber fFmpegFrameGrabber = new FFmpegFrameGrabber(file);
    String filePath = "D://video//images//";
    String fileTargetName = "movie";
    try {
      fFmpegFrameGrabber.start();
      int ftp = fFmpegFrameGrabber.getLengthInFrames();
      System.out.println("开始视频提取帧");
      for (int i=0 ; i < ftp ; i++){
        if( i >= start && i <= end){
          frame = fFmpegFrameGrabber.grabImage();
          doExecuteFrame(frame, filePath, fileTargetName, i ,files);
        }
      }
      System.out.println("============运行结束============");
      fFmpegFrameGrabber.stop();
    } catch (IOException E) {
//      Loggers.ERROR.error("视频抽帧异常", e);
    }
    return files;
  }

  public static void doExecuteFrame(Frame frame, String targetFilePath, String targetFileName, int index ,List<File> files) {
    if ( frame == null || frame.image == null) {
      return;
    }
    Java2DFrameConverter converter = new Java2DFrameConverter();
    String imageMat = "jpg";
    String fileName = targetFilePath + targetFileName + "_" + index + "." + imageMat;
    BufferedImage bi = converter.getBufferedImage(frame);
    File output = new File(fileName);
    files.add(output);
    try{
      ImageIO.write(bi, imageMat, output);
    } catch (IOException e) {
      e.printStackTrace();
    }
  }

  public static void main(String[] args) {
    List<File> files = videoIntercept(new File("D://video//1553583033205-480p.mp4"), 10, 20);
    System.out.println(files);
  }