- 添加依赖
<dependency> <groupId>org.bytedeco</groupId> <artifactId>javacv-platform</artifactId> <version>1.4.4</version> </dependency>
- 核心代码
/** * 获取视频时长，单位为秒 * * @param video 源视频文件 * @return 时长（s） */ public static long getVideoDuration(File video) { long duration = 0L; FFmpegFrameGrabber ff = new FFmpegFrameGrabber(video); try { ff.start(); duration = ff.getLengthInTime() / (1000 * 1000); ff.stop(); } catch (FrameGrabber.Exception e) { e.printStackTrace(); } return duration; }
/** * 截取视频得到指定帧的图片 * * @param video 源视频文件 * @param picPath 截图存放路径 */ public static void getVideoPic(File video, String picPath) { FFmpegFrameGrabber ff = new FFmpegFrameGrabber(video); try { ff.start(); // 截取中间帧图片(具体依实际状况而定) int i = 0; int length = ff.getLengthInFrames(); int middleFrame = length / 2; Frame frame = null; while (i < length) { frame = ff.grabFrame(); if ((i > middleFrame) && (frame.image != null)) { break; } i++; } // 截取的帧图片 Java2DFrameConverter converter = new Java2DFrameConverter(); BufferedImage srcImage = converter.getBufferedImage(frame); int srcImageWidth = srcImage.getWidth(); int srcImageHeight = srcImage.getHeight(); // 对截图进行等比例缩放(缩略图) int width = 480; int height = (int) (((double) width / srcImageWidth) * srcImageHeight); BufferedImage thumbnailImage = new BufferedImage(width, height, BufferedImage.TYPE_3BYTE_BGR); thumbnailImage.getGraphics().drawImage(srcImage.getScaledInstance(width, height, Image.SCALE_SMOOTH), 0, 0, null); File picFile = new File(picPath); ImageIO.write(thumbnailImage, "jpg", picFile); ff.stop(); } catch (IOException e) { e.printStackTrace(); } }
- 测试用例
public static void main(String[] args) { String videoPath = ResourceUtils.CLASSPATH_URL_PREFIX + "video.mp4"; File video = null; try { video = ResourceUtils.getFile(videoPath); } catch (FileNotFoundException e) { e.printStackTrace(); } String picPath = "video.jpg"; getVideoPic(video, picPath); long duration = getVideoDuration(video); System.out.println("videoDuration = " + duration); }