视频

java获取视频第一帧

web展示视频，如果通过直接展示，视频是黑色照片显示，此方法可以通过后台截取获取到的视频第一帧，获取到视频的照片，代码如下，写的是main方法，方便大家进行测试与修改。如果对大家有用，请留言支持！

pom文件

<!-- javacv start -->
<dependency>
    <groupId>org.bytedeco</groupId>
    <artifactId>javacpp</artifactId>
    <version>1.4.1</version>
</dependency>
<dependency>
    <groupId>org.bytedeco</groupId>
    <artifactId>javacv</artifactId>
    <version>1.4.1</version>
</dependency>
<dependency>
    <groupId>org.bytedeco.javacpp-presets</groupId>
    <artifactId>opencv-platform</artifactId>
    <version>3.4.1-1.4.1</version>
</dependency>
<dependency>
    <groupId>org.bytedeco.javacpp-presets</groupId>
    <artifactId>ffmpeg-platform</artifactId>
    <version>3.4.2-1.4.1</version>
</dependency>
<!-- javacv end -->

<dependency>
    <groupId>org.bytedeco.javacpp-presets</groupId>
    <artifactId>opencv-platform</artifactId>
    <version>3.4.1-1.4.1</version>
</dependency>

java代码

package com.zifeng.check.utils;


import org.bytedeco.javacv.FFmpegFrameGrabber;
import org.bytedeco.javacv.Frame;
import org.bytedeco.javacv.Java2DFrameConverter;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import javax.imageio.ImageIO;
import java.awt.image.BufferedImage;
import java.awt.image.RenderedImage;
import java.io.File;

public class videoText {

    public static final Logger log = LoggerFactory.getLogger(videoText.class);
    
    public static String getTempPath(String tempPath, String filePath) throws Exception {
//        String tempPath="    ";//保存的目标路径
        File targetFile = new File(tempPath);
        if (!targetFile.getParentFile().exists()) {
            targetFile.getParentFile().mkdirs();
        }
            File file2 = new File(filePath);
            if (file2.exists()) {
                log.info("文件存在，路径正确！");
                FFmpegFrameGrabber ff = new FFmpegFrameGrabber(file2);
                ff.start();
                int ftp = ff.getLengthInFrames();
                int flag=0;
                Frame frame = null;
                while (flag <= ftp) {
                    //获取帧
                    frame = ff.grabImage();
                    //过滤前3帧，避免出现全黑图片
                    if ((flag>3)&&(frame != null)) {
                        break;
                    }
                    flag++;
                }
                ImageIO.write(FrameToBufferedImage(frame), "jpg", targetFile);
                ff.close();
                ff.stop();
            }
        return null;
    }
    private static RenderedImage FrameToBufferedImage(Frame frame) {
        //创建BufferedImage对象
        Java2DFrameConverter converter = new Java2DFrameConverter();
        BufferedImage bufferedImage = converter.getBufferedImage(frame);
        return bufferedImage;
    }

    public static void main(String[] args) {
        try {
//            getTempPath("http://jyt.fty.pw:8080/videos/guoyifang/a2966518-03dd-4a31-b05b-5c52db6baf73.mp4", "D:\\test.jpg");
            getTempPath("D:\\test.jpg", "D:/videoText/1.mp4");
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

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