52 lines
1.8 KiB
Java
52 lines
1.8 KiB
Java
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package it.acxent.videoj;
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import java.awt.image.BufferedImage;
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import java.io.File;
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import java.util.LinkedHashSet;
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import javax.imageio.ImageIO;
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import org.jcodec.api.FrameGrab;
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import org.jcodec.common.io.NIOUtils;
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import org.jcodec.common.model.Picture;
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public class ManageVideoJ {
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public static final LinkedHashSet<String> extractNFrames(String videoFileName, String targetDir, String targetName, int nFrames) throws Exception {
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Timer timer = new Timer();
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timer.start();
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FrameGrab g = FrameGrab.createFrameGrab(NIOUtils.readableChannel(new File(videoFileName)));
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LinkedHashSet<String> frames = new LinkedHashSet<>();
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BufferedImage bufferedImage = null;
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Picture picture = null;
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try {
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File targetDirFile = new File(targetDir);
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if (!targetDirFile.exists())
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targetDirFile.mkdirs();
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int movieLen = g.getVideoTrack().getMeta().getTotalFrames();
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int step = movieLen / (nFrames + 1);
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System.out.println("len:" + movieLen + " step: " + step);
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for (int i = 0; i < nFrames; i++) {
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g.seekToFrameSloppy(i * step);
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picture = g.getNativeFrame();
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bufferedImage = AWTUtil.toBufferedImage(picture);
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String currentFile = targetDir + targetDir + "_" + targetName + ".jpg";
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frames.add(currentFile);
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File frameFile = new File(currentFile);
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ImageIO.write(bufferedImage, "jpg", frameFile);
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bufferedImage.flush();
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bufferedImage = null;
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picture = null;
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}
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} finally {
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if (bufferedImage != null) {
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bufferedImage.flush();
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bufferedImage = null;
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}
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if (g != null) {
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g.getDecoder().shutdownThreadPool();
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g = null;
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}
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}
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timer.stop();
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System.out.println("extractNFrames. DURATA: " + timer.getDurataHourMin());
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return frames;
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}
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}
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