gistfile1.java

package com.tracermedia.gcf1001.webcam;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import uk.co.caprica.vlcj.player.MediaPlayer;
import uk.co.caprica.vlcj.player.MediaPlayerFactory;
import uk.co.caprica.vlcj.player.events.VideoOutputEventListener;
import uk.co.caprica.vlcj.player.headless.HeadlessMediaPlayer;

public class WebcamCaptureTest {

    private static final Logger LOG = LoggerFactory.getLogger(WebcamCaptureTest.class);

    public static void main(final String[] args) throws InterruptedException {
        if (args.length != 1) {
            System.out.println("Specify a capture device MRL, for example \"v4l2:///dev/video0\" or \"dshow://\"");
            System.exit(1);
        }

        MediaPlayerFactory factory = new MediaPlayerFactory("--no-video-title-show");
        HeadlessMediaPlayer mediaPlayer = factory.newHeadlessMediaPlayer();

        mediaPlayer.addVideoOutputEventListener(new VideoOutputEventListener() {
            public void videoOutputAvailable(MediaPlayer mediaPlayer, boolean videoOutput) {
                if (videoOutput) {
                    for (int i = 3; i >= 0; i--) {
                        LOG.info("Taking snapshot {}", i == 0 ? "now!" : "in " + i);
                        try {
                            Thread.sleep(1000);
                        } catch (InterruptedException e) {
                            e.printStackTrace();
                        }
                    }
                    mediaPlayer.saveSnapshot();
                } else {
                    LOG.error("Failed to achieve video frame grab.");
                }
            }
        });

        String[] options = {
                "--no-video-title-show",
                "--no-audio"
        };
        mediaPlayer.playMedia(args[0], options);

        try {
            Thread.currentThread().join();
        } catch (InterruptedException e) {
            e.printStackTrace();
        }

        mediaPlayer.release();
        factory.release();
        LOG.info("Cleaned up");
    }


}