javacv 基础04-读取mp4,avi等视频文件并截图保存图片到本地

javacv 读取mp4,avi等视频文件并截图保存图片到本地

代码如下：

package com.example.javacvstudy;


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;

import org.opencv.core.Core;
import org.springframework.boot.test.context.SpringBootTest;



@SpringBootTest
class ReadMp4 {


    public static void main(String[] args) {
// 加载OpenCV库
        System.loadLibrary(Core.NATIVE_LIBRARY_NAME);

        // 视频文件路径
        String videoPath = "D:\\down\\baozi.mp4"; // 替换为您的视频路径

        // 保存帧截图的文件夹路径
        String outputFolderPath = "D:\\temp\\img"; // 替换为您的输出文件夹路径
        File outputFolder = new File(outputFolderPath);
        outputFolder.mkdirs();

        // 打开视频文件
        try (FFmpegFrameGrabber grabber = new FFmpegFrameGrabber(videoPath)) {
            grabber.start();

            // 遍历视频的每一帧
            int frameNumber = 0;
            Java2DFrameConverter converter = new Java2DFrameConverter();
            while (true) {
                Frame frame  =  grabber.grabImage();
                if (frame == null) {
                    break;
                }

                // 将帧转换为BufferedImage
                BufferedImage image = converter.convert(frame);

                // 保存图片
                String outputFilePath = outputFolderPath + File.separator + "frame_" + frameNumber + ".jpg";
                File outputFile = new File(outputFilePath);
                ImageIO.write(image, "jpg", outputFile);

                frameNumber++;
                Thread.sleep(1000);
            }
            grabber.stop();
        } catch (Exception e) {
            e.printStackTrace();
        }

        System.out.println("帧截图保存完成！");

    }



}