Java怎样获取视频时长及截取帧截图

小编给大家分享一下Java怎样获取视频时长及截取帧截图，相信大部分人都还不怎么了解，因此分享这篇文章给大家参考一下，希望大家阅读完这篇文章后大有收获，下面让我们一起去了解一下吧！

示例

添加依赖

<dependency>      <groupId>org.bytedeco</groupId>      <artifactId>javacv-platform</artifactId>      <version>1.4.4</version>    </dependency>

上述这段 maven 依赖包含了完整的 javacv 功能 (非常多，依赖Jar就占大概有500MB)，由于这里只使用到了其中 ffmpeg 这块的特性，因此也可以像下面这样排除掉无关的部分

<dependency>      <groupId>org.bytedeco</groupId>      <artifactId>javacv</artifactId>      <version>1.4.4</version>      <exclusions>        <exclusion>          <groupId>org.bytedeco</groupId>          <artifactId>javacpp</artifactId>        </exclusion>        <exclusion>          <groupId>org.bytedeco.javacpp-presets</groupId>          <artifactId>flycapture</artifactId>        </exclusion>        <exclusion>          <groupId>org.bytedeco.javacpp-presets</groupId>          <artifactId>libdc1394</artifactId>        </exclusion>        <exclusion>          <groupId>org.bytedeco.javacpp-presets</groupId>          <artifactId>libfreenect</artifactId>        </exclusion>        <exclusion>          <groupId>org.bytedeco.javacpp-presets</groupId>          <artifactId>libfreenect2</artifactId>        </exclusion>        <exclusion>          <groupId>org.bytedeco.javacpp-presets</groupId>          <artifactId>librealsense</artifactId>        </exclusion>        <exclusion>          <groupId>org.bytedeco.javacpp-presets</groupId>          <artifactId>videoinput</artifactId>        </exclusion>        <exclusion>          <groupId>org.bytedeco.javacpp-presets</groupId>          <artifactId>opencv</artifactId>        </exclusion>        <exclusion>          <groupId>org.bytedeco.javacpp-presets</groupId>          <artifactId>tesseract</artifactId>        </exclusion>        <exclusion>          <groupId>org.bytedeco.javacpp-presets</groupId>          <artifactId>leptonica</artifactId>        </exclusion>        <exclusion>          <groupId>org.bytedeco.javacpp-presets</groupId>          <artifactId>flandmark</artifactId>        </exclusion>        <exclusion>          <groupId>org.bytedeco.javacpp-presets</groupId>          <artifactId>artoolkitplus</artifactId>        </exclusion>      </exclusions>    </dependency>    <dependency>      <groupId>org.bytedeco</groupId>      <artifactId>javacv-platform</artifactId>      <version>1.4.4</version>      <exclusions>        <exclusion>          <groupId>org.bytedeco</groupId>          <artifactId>javacv</artifactId>        </exclusion>        <exclusion>          <groupId>org.bytedeco.javacpp-presets</groupId>          <artifactId>flycapture-platform</artifactId>        </exclusion>        <exclusion>          <groupId>org.bytedeco.javacpp-presets</groupId>          <artifactId>libdc1394-platform</artifactId>        </exclusion>        <exclusion>          <groupId>org.bytedeco.javacpp-presets</groupId>          <artifactId>libfreenect-platform</artifactId>        </exclusion>        <exclusion>          <groupId>org.bytedeco.javacpp-presets</groupId>          <artifactId>libfreenect2-platform</artifactId>        </exclusion>        <exclusion>          <groupId>org.bytedeco.javacpp-presets</groupId>          <artifactId>librealsense-platform</artifactId>        </exclusion>        <exclusion>          <groupId>org.bytedeco.javacpp-presets</groupId>          <artifactId>videoinput-platform</artifactId>        </exclusion>        <exclusion>          <groupId>org.bytedeco.javacpp-presets</groupId>          <artifactId>opencv-platform</artifactId>        </exclusion>        <exclusion>          <groupId>org.bytedeco.javacpp-presets</groupId>          <artifactId>tesseract-platform</artifactId>        </exclusion>        <exclusion>          <groupId>org.bytedeco.javacpp-presets</groupId>          <artifactId>leptonica-platform</artifactId>        </exclusion>        <exclusion>          <groupId>org.bytedeco.javacpp-presets</groupId>          <artifactId>flandmark-platform</artifactId>        </exclusion>        <exclusion>          <groupId>org.bytedeco.javacpp-presets</groupId>          <artifactId>artoolkitplus-platform</artifactId>        </exclusion>      </exclusions>    </dependency>

核心代码

获取视频时长

/**   * 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;  }

截取视频指定帧为图片

/**   * 截取视频获得指定帧的图片   *   * @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(具体依实际情况而定)      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);  }

以上是“Java怎样获取视频时长及截取帧截图”这篇文章的所有内容，感谢各位的阅读！相信大家都有了一定的了解，希望分享的内容对大家有所帮助，如果还想学习更多知识，欢迎关注亿速云行业资讯频道！