需求是通过Java获取视频中的某个帧的图片,项目依赖包如下:

jar下载地址:https://pan.baidu.com/s/1LI68r6H17sAA4Pfbnpm44g

转换类:

package com.sundy.app;

import java.awt.Image;

import java.awt.image.BufferedImage;

import java.io.File;

import javax.imageio.ImageIO;

import org.bytedeco.javacv.FFmpegFrameGrabber;

import org.bytedeco.javacv.Frame;

import org.bytedeco.javacv.Java2DFrameConverter;

public class FileUtils {

public static void main(String[] args) throws Exception {

String videoFilePath="D:\\avifile\\test002.mp4";

String picFilePath="D:\\\\avifile\\\\test003.jpg";

fetchFrame(videoFilePath,picFilePath);

}

public static void fetchFrame(String videofile, String framefile)

            throws Exception {

        long start = System.currentTimeMillis();

        File targetFile = new File(framefile);

        FFmpegFrameGrabber ff = new FFmpegFrameGrabber(videofile);

        ff.start();

        int lenght = ff.getLengthInFrames();

        int i = 0;

        Frame f = null;

        while (i < lenght) {

            // 过滤前5帧，避免出现全黑的图片，依自己情况而定

            f = ff.grabFrame();

            if ((i > 48) && (f.image != null)) {

                break;

            }

            i++;

        }

//        IplImage img = f.image;

        int owidth = f.imageWidth;

        int oheight = f.imageHeight;

        // 对截取的帧进行等比例缩放

        int width = 300;

        int height = (int) (((double) width / owidth) * oheight);

        Java2DFrameConverter converter = new Java2DFrameConverter();

        BufferedImage fecthedImage = converter.getBufferedImage(f);

        BufferedImage bi = new BufferedImage(width, height, BufferedImage.TYPE_3BYTE_BGR);

        bi.getGraphics().drawImage(fecthedImage.getScaledInstance(width, height, Image.SCALE_SMOOTH),

                0, 0, null);

        ImageIO.write(bi, "jpg", targetFile);

        ff.stop();

        System.out.println(System.currentTimeMillis() - start);

    }

}