Java截取视频第一帧

方法一：使用第三方jar包截取

1、导入依赖

        org.bytedeco
        javacv
        0.8
    

2、示例

package com.zemel.video;

import java.awt.Image;
import java.awt.image.BufferedImage;
import java.io.File;

import javax.imageio.ImageIO;

import org.bytedeco.javacpp.opencv_core.IplImage;
import org.bytedeco.javacv.FFmpegFrameGrabber;
import org.bytedeco.javacv.Frame;

public class Test {

	/**
	 * 获取指定视频的帧并保存为图片至指定目录
	 * @param videofile  源视频文件路径
	 * @param framefile  截取帧的图片存放路径
	 * @throws Exception
	 */
	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 > 5) && (f.image != null)) {
	            break;
	        }
	        i++;
	    }
	    IplImage img = f.image;
	    int owidth = img.width();
	    int oheight = img.height();
	    // 对截取的帧进行等比例缩放
	    int width = 800;
	    int height = (int) (((double) width / owidth) * oheight);
	    BufferedImage bi = new BufferedImage(width, height, BufferedImage.TYPE_3BYTE_BGR);
	    bi.getGraphics().drawImage(f.image.getBufferedImage().getScaledInstance(width, height, Image.SCALE_SMOOTH),
	            0, 0, null);
	    ImageIO.write(bi, "jpg", targetFile);
	    //ff.flush();
	    ff.stop();
	    System.out.println(System.currentTimeMillis() - start);
	}

	public static void main(String[] args) {
	    try {
	        Test.fetchFrame("D:\\biudata\\vedio\\1523598768844GFE2GWDDM8.mp4", "D:\\biudata\\vedio\\test5.jpg");
	    } catch (Exception e) {
	        e.printStackTrace();
	    }
	}
}

方法二：使用ffmpeg

1、下载ffmpeg工具(http://ffmpeg.org/)

2、代码

public static boolean processImg(String veido_path, String ffmpeg_path) {
		File file = new File(veido_path);
		if (!file.exists()) {
			System.err.println("路径[" + veido_path + "]对应的视频文件不存在!");
			return false;
		}
		List commands = new java.util.ArrayList();
		commands.add(ffmpeg_path);
		commands.add("-i");
		commands.add(veido_path);
		commands.add("-y");
		commands.add("-f");
		commands.add("image2");
		commands.add("-ss");
		commands.add("8");// 这个参数是设置截取视频多少秒时的画面
		// commands.add("-t");
		// commands.add("0.001");
		commands.add("-s");
		commands.add("700x525");
		commands.add(veido_path.substring(0, veido_path.lastIndexOf("."))
				.replaceFirst("vedio", "file") + ".jpg");
		try {
			ProcessBuilder builder = new ProcessBuilder();
			builder.command(commands);
			builder.start();
			System.out.println("截取成功");
			return true;
		} catch (Exception e) {
			e.printStackTrace();
			return false;
		}
	}
	public static void main(String[] args) {
		processImg("D:\\biudata\\vedio\\15235879054813G0I1783E2.mp4",
				"F:\\开发工具\\ffmpeg.exe");
	}