java截取视频帧

一、通过JavaCV

引入依赖

<dependency><groupId>org.bytedeco</groupId><artifactId>javacv-platform</artifactId><version>1.5.7</version>
</dependency>

工具类

import org.bytedeco.javacv.FFmpegFrameGrabber;
import org.bytedeco.javacv.Frame;
import org.bytedeco.javacv.Java2DFrameConverter;import javax.imageio.ImageIO;
import java.awt.image.BufferedImage;
import java.io.File;public class JavaCvUtil {/*** @param videoFilePath 视频文件路径* @param outFramePath 输出帧的路径* @param frameNum  帧序号，从1开始* @return  返回真图片对应的File对象*/public static File getFrameFile(String videoFilePath, String outFramePath, int frameNum) {try (FFmpegFrameGrabber grabber = new FFmpegFrameGrabber(videoFilePath)) {grabber.start();// 获取帧Frame frame = null;while (frameNum > 0) {frame = grabber.grabImage();frameNum--;}// 转换为BufferedImageJava2DFrameConverter converter = new Java2DFrameConverter();BufferedImage image = converter.getBufferedImage(frame);// 保存为图片ImageIO.write(image, "jpg", new File(outFramePath));System.out.println("帧已保存到: " + outFramePath);return new File(outFramePath);} catch (Exception e) {e.printStackTrace();}return null;}
}

二、通过ffmpeg命令

首先要下载ffmpeg，配置环境变量，可参考：FFmpeg 超级详细安装与配置教程（Windows 系统）_windows安装ffmpeg-CSDN博客

工具类

import java.io.File;
import java.io.IOException;public class FfmpegUtil {/*** @param videoFilePath 视频文件路径* @param outFramePath 输出帧的路径* @param frameNum  帧序号，从1开始* @return  返回真图片对应的File对象*/public static File getFrameFile(String videoFilePath, String outFramePath, int frameNum) {try {ProcessBuilder pb = new ProcessBuilder("ffmpeg","-i", videoFilePath,"-vframes", "1",//  由于ffmpeg的参数select的参数n是0开始，所以这里减1"-vf","select=eq(n\\,%d)".formatted(frameNum - 1),"-q:v", "2",outFramePath);Process process = pb.start();int exitCode = process.waitFor();if (exitCode == 0) {System.out.println("帧已保存到: " + outFramePath);} else {System.out.println("截取帧失败");}return new File(outFramePath);} catch (IOException | InterruptedException e) {e.printStackTrace();}return null;}
}