Java中grabImage_JavaCV实现将视频以帧方式抽取

使用前&＃xff1a; 在用JavaCV实现以帧方式抽取视频的前&＃xff0c;我们需要先从bytedeco/javacv下载第三方的压缩包&＃xff0c;解压后按自己的需求往自己的IDE ( * IDEA / Eclipse * ) 导入解压缩包下JAR文件;

接下来就以代码方式来说明如何利用Javacv来将视频以帧的方式抽取出来:

import org.bytedeco.javacv.FFmpegFrameGrabber;

import org.bytedeco.javacv.Frame;

import org.bytedeco.javacv.Java2DFrameConverter;

import javax.imageio.ImageIO;

import java.awt.image.BufferedImage;

import java.io.File;

import java.io.IOException;

import static org.bytedeco.javacpp.opencv_core.IplImage;

import static org.bytedeco.javacpp.opencv_core.cvReleaseImage;

import static org.bytedeco.javacpp.opencv_imgcodecs.cvLoadImage;

import static org.bytedeco.javacpp.opencv_imgcodecs.cvSaveImage;

import static org.bytedeco.javacpp.opencv_imgproc.cvSmooth;

public class JavaCV {

// the image&＃39;s path;

final static String imagePath &＃61; "/home/lance/abc.jpg/";

// the vedio&＃39;s path and filename;

final static String vedioPath &＃61; "/home/lance/target-a/";

final static String vedioName &＃61; "origin-a.mp4";

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

smooth(imagePath);

grabberFFmpegImage(vedioPath &＃43; vedioName, vedioPath

, vedioName, 30);

}

// the method of compress image;

public static void smooth(String fileName) {

IplImage iplImage &＃61; cvLoadImage(fileName);

if (iplImage !&＃61; null) {

cvSmooth(iplImage, iplImage);

cvSaveImage(fileName, iplImage);

cvReleaseImage(iplImage);

}

}

// grab ffmpegImage from vedio;

public static void grabberFFmpegImage(String filePath, String fileTargetPath

, String fileTargetName, int grabSize) throws Exception{

FFmpegFrameGrabber ff &＃61; FFmpegFrameGrabber.createDefault(filePath);

ff.start();

for (int i &＃61; 0; i

Frame frame &＃61; ff.grabImage();

doExecuteFrame(frame, filePath, fileTargetName, i);

}

ff.stop();

}

// grab frame from vedio;

public static void doExecuteFrame(Frame frame, String targetFilePath, String targetFileName, int index) {

if ( frame &＃61;&＃61; null || frame.image &＃61;&＃61; null) {

return;

}

Java2DFrameConverter converter &＃61; new Java2DFrameConverter();

String imageMat &＃61; "jpg";

String fileName &＃61; targetFilePath &＃43; File.pathSeparator &＃43; targetFileName &＃43; "_" &＃43; index &＃43; "." &＃43; imageMat;

BufferedImage bi &＃61; converter.getBufferedImage(frame);

File output &＃61; new File(fileName);

try{

ImageIO.write(bi, imageMat, output);

} catch (IOException e) {

e.printStackTrace();

}

}

}

以上就是本文的全部内容&＃xff0c;希望对大家的学习有所帮助&＃xff0c;也希望大家多多支持谷谷点程序。