ffmpeg.exe 获取视频第一帧-优快云博客

本文介绍了一种使用ffmpeg工具从视频中提取指定时间点图片的方法，并提供了完整的Java代码实现。该方法可用于快速获取视频的第一帧作为缩略图。

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直接上代码-依赖ffmpeg.exe运行文件

package com.common.util;
import java.awt.Image;
import java.awt.image.BufferedImage;
import java.io.BufferedReader;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;

import javax.imageio.IIOImage;
import javax.imageio.ImageIO;
import javax.imageio.ImageWriteParam;
import javax.imageio.ImageWriter;

public class VideoThumbTaker {
    protected String ffmpegApp;

    public VideoThumbTaker(String ffmpegApp) {
        this.ffmpegApp = ffmpegApp;
    }

    @SuppressWarnings("unused")
    /****
     * 获取指定时间内的图片
     * @param videoFilename:视频路径
     * @param thumbFilename:图片保存路径
     * @param width:图片长
     * @param height:图片宽
     * @param hour:指定时
     * @param min:指定分
     * @param sec:指定秒
     * @throws IOException
     * @throws InterruptedException
     */
    public void getThumb(String videoFilename, String thumbFilename, int width, int height, int hour, int min, float sec) throws IOException, InterruptedException {
        ProcessBuilder processBuilder = new ProcessBuilder(ffmpegApp, "-y", "-i", videoFilename, "-vframes", "1", "-ss", hour + ":" + min + ":" + sec, "-f", "mjpeg", "-s", width + "*" + height, "-an",
                thumbFilename);

        Process process = processBuilder.start();

        InputStream stderr = process.getErrorStream();
        InputStreamReader isr = new InputStreamReader(stderr);
        BufferedReader br = new BufferedReader(isr);
        String line;
        while ((line = br.readLine()) != null)
            ;
        process.waitFor();

        if (br != null)
            br.close();
        if (isr != null)
            isr.close();
        if (stderr != null)
            stderr.close();
    }
      
    public static void main(String[] args) {
        String path = UploadFileUtil.class.getClassLoader().getResource("ffmpeg/ffmpeg.exe").getPath();

        VideoThumbTaker videoThumbTaker = new VideoThumbTaker(path);
        try {
            videoThumbTaker.getThumb("D:\\elwPath\\20170825024823546.mp4", "D:\\mp41.png",300, 200, 0, 0, 1);
            System.out.println("over");
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}