Exception in thread "main" java.lang.NoClassDefFoundError: Could not initialize class org.bytedeco.javacpp.avutil
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:274)
at org.bytedeco.javacpp.Loader.load(Loader.java:385)
at org.bytedeco.javacpp.Loader.load(Loader.java:353)
at org.bytedeco.javacpp.avformat$AVFormatContext.<clinit>(avformat.java:2249)
at org.bytedeco.javacv.FFmpegFrameGrabber.startUnsafe(FFmpegFrameGrabber.java:346)
at org.bytedeco.javacv.FFmpegFrameGrabber.start(FFmpegFrameGrabber.java:340)

<dependency>
    <groupId>org.bytedeco</groupId>
    <artifactId>javacv</artifactId>
    <version>1.0</version>
</dependency>

FFmpegFrameGrabber g = new FFmpegFrameGrabber("textures/video/anim.mp4");
g.start();

for (int i = 0 ; i < 50 ; i++) {
    ImageIO.write(g.grab().getBufferedImage(), "png", new File("frame-dump/video-frame-" + System.currentTimeMillis() + ".png"));
}

g.stop();

package com.egova.ffmpeg.java;
 
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
 
import javax.imageio.ImageIO;
 
import org.bytedeco.javacv.FFmpegFrameGrabber;
import org.bytedeco.javacv.Frame;
import org.bytedeco.javacv.FrameGrabber.Exception;
import org.bytedeco.javacv.Java2DFrameConverter;
 
public abstract class FrameGrabberKit {
 
    public static void main(String[] args) throws Exception {
        randomGrabberFFmpegImage("F:/CodeSpace/java/ffmpeg_java/resource/月赋情长.mp4", "./target", "月赋情长", 10);
    }
 
     
    public static void randomGrabberFFmpegImage(String filePath, String targerFilePath, String targetFileName, int randomSize)
            throws Exception {
        FFmpegFrameGrabber ff = FFmpegFrameGrabber.createDefault(filePath);
        ff.start();
        int ffLength = ff.getLengthInFrames();
        List<Integer> randomGrab = random(ffLength, randomSize);
        int maxRandomGrab = randomGrab.get(randomGrab.size() - 1);
        Frame f;
        int i = 0;
        while (i < ffLength) {
            f = ff.grabImage();
            if (randomGrab.contains(i)) {
                doExecuteFrame(f, targerFilePath, targetFileName, i);
            }
            if (i >= maxRandomGrab) {
                break;
            }
            i++;
        }
        ff.stop();
    }
 
    public static void doExecuteFrame(Frame f, String targerFilePath, String targetFileName, int index) {
        if (null == f || null == f.image) {
            return;
        }
         
        Java2DFrameConverter converter = new Java2DFrameConverter();
 
        String imageMat = "jpg";
        String FileName = targerFilePath + File.separator + targetFileName + "_" + index + "." + imageMat;
        BufferedImage bi = converter.getBufferedImage(f);
        File output = new File(FileName);
        try {
            ImageIO.write(bi, imageMat, output);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
 
    public static List<Integer> random(int baseNum, int length) {
 
        List<Integer> list = new ArrayList<>(length);
        while (list.size() < length) {
            Integer next = (int) (Math.random() * baseNum);
            if (list.contains(next)) {
                continue;
            }
            list.add(next);
        }
        Collections.sort(list);
        return list;
    }
}