原文地址:https://blog.csdn.net/zhou_hai_feng/article/details/81453169
一、項目需要的jar
jar下載地址: https://pan.baidu.com/s/1VjhwDoMpz7Y3IIyz89Sqmw
二、實現代碼
package com.caoyn;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import javax.imageio.ImageIO;
import org.bytedeco.javacpp.opencv_core;
import org.bytedeco.javacpp.opencv_core.IplImage;
import org.bytedeco.javacv.FFmpegFrameGrabber;
import org.bytedeco.javacv.Frame;
import org.bytedeco.javacv.FrameGrabber.Exception;
import org.bytedeco.javacv.Java2DFrameConverter;
import org.bytedeco.javacv.OpenCVFrameConverter;
/**
* javacv
* @author ph
*
*/
public class FrameGrabberKit {
public static void main(String[] args) throws Exception {
System.out.println(System.getProperty("java.library.path"));
try {
fetchFrame("E:/BaiduNetdiskDownload/cs01.mp4", "E:/BaiduNetdiskDownload/cs01.jpg");
} catch (IOException e) {
e.printStackTrace();
}
}
/**
* 獲取指定視頻的幀並保存爲圖片至指定目錄
* @param videofile 源視頻文件路徑
* @param framefile 截取幀的圖片存放路徑
* @throws Exception
* @throws IOException
*/
public static void fetchFrame(String videofile, String framefile)
throws Exception, IOException {
FFmpegFrameGrabber ff = new FFmpegFrameGrabber(videofile);
ff.start();
ff.getAudioChannels();
String rotate =ff.getVideoMetadata("rotate");//視頻的旋轉角度
int lenght = ff.getLengthInFrames();
int i = 0;
Frame f = null;
while (i < lenght) {
// 過濾前5幀,避免出現全黑的圖片,依自己情況而定
f = ff.grabFrame();
if ((i > 5) && (f.image != null)) {
break;
}
IplImage src = null;
if(null !=rotate &&rotate.length() > 1) {
OpenCVFrameConverter.ToIplImage converter =new OpenCVFrameConverter.ToIplImage();
src =converter.convert(f);
f =converter.convert(rotate(src, Integer.valueOf(rotate)));
}
doExecuteFrame(f, framefile);
i++;
}
}
public static IplImage rotate(IplImage src,int angle) {
IplImage img = IplImage.create(src.height(),src.width(),src.depth(),src.nChannels());
opencv_core.cvTranspose(src,img);
opencv_core.cvFlip(img,img,angle);
return img;
}
public static void doExecuteFrame(Frame f,String targetFileName) {
if (null ==f ||null ==f.image) {
return;
}
Java2DFrameConverter converter =new Java2DFrameConverter();
BufferedImage bi =converter.getBufferedImage(f);
File output =new File(targetFileName);
try {
ImageIO.write(bi,"jpg",output);
}catch (IOException e) {
e.printStackTrace();
}
}
}