如何在java中使用vlcj？

Question

大家好，我正在尝试使用vlcj for java，但是遇到了很多错误。我检查了我的jvm版本和vlc介质版本都是64位。

我尝试了很多我在互联网上研究过的代码。按照这个步骤，我在代码中插入了vlcj.jar，但似乎什么都不起作用。

我遵循了caprica上的教程，但它不起作用。现在我得到了错误

Exception in thread "main" java.lang.IllegalArgumentException: Interface (LibVlc) of library=libvlc does not extend Library B.

有人能帮帮忙吗？

package mrbool.vlc.example; 

import uk.co.caprica.vlcj.binding.LibVlc;
import uk.co.caprica.vlcj.factory.MediaPlayerFactory;

import uk.co.caprica.vlcj.player.embedded.EmbeddedMediaPlayer;
import uk.co.caprica.vlcj.binding.LibVlc;

import com.sun.jna.Native;
import com.sun.jna.NativeLibrary;
import uk.co.caprica.vlcj.binding.RuntimeUtil;
public class JavaApplication1 {
        


    public static void main(String[] args) {
      NativeLibrary.addSearchPath(RuntimeUtil.getLibVlcLibraryName(),"C:\\Program Files\\VideoLAN\\VLC");
      Native.loadLibrary(RuntimeUtil.getLibVlcLibraryName(), LibVlc.class);
      MediaPlayerFactory factory = new MediaPlayerFactory();
    }

}

Answer 1

有时问题是由于VLC和JRE的架构不兼容造成的。

您可以使用以下代码检查JRE架构：

public class JavaApplication12 {
    public static void main(String[] args) {
        System.out.println(System.getProperty("sun.arch.data.model"));
    }
}


EmbeddedMediaPlayerComponent mediaPlayerComponent = new EmbeddedMediaPlayerComponent();
        EmbeddedMediaPlayer embeddedMediaPlayer = mediaPlayerComponent.getMediaPlayer();

        Canvas videoSurface = new Canvas();
        videoSurface.setBackground(Color.black);
        videoSurface.setSize(800, 600);

        List<String> vlcArgs = new ArrayList<String>();

        vlcArgs.add("--no-plugins-cache");
        vlcArgs.add("--no-video-title-show");
        vlcArgs.add("--no-snapshot-preview");

        MediaPlayerFactory mediaPlayerFactory = new MediaPlayerFactory(vlcArgs.toArray(new String[vlcArgs.size()]));
        mediaPlayerFactory.setUserAgent("vlcj test player");
        embeddedMediaPlayer.setVideoSurface(mediaPlayerFactory.newVideoSurface(videoSurface));
        embeddedMediaPlayer.setPlaySubItems(true);

        final PlayerControlsPanel controlsPanel = new PlayerControlsPanel(embeddedMediaPlayer);
        PlayerVideoAdjustPanel videoAdjustPanel = new PlayerVideoAdjustPanel(embeddedMediaPlayer);

//            mediaPlayerComponent.getMediaPlayer().playMedia(Constant.PATH_ROOT + Constant.PATH_MEDIA + "tmp.mp4");
        JFrame mainFrame = new JFrame();
        mainFrame.setLayout(new BorderLayout());
        mainFrame.setBackground(Color.black);
        mainFrame.add(videoSurface, BorderLayout.CENTER);
        mainFrame.add(controlsPanel, BorderLayout.SOUTH);
        mainFrame.add(videoAdjustPanel, BorderLayout.EAST);

        //create a button which will hide the panel when clicked.
        mainFrame.pack();
        mainFrame.setVisible(true);

        embeddedMediaPlayer.playMedia("tmp.mp4");

Answer 2

将vlc媒体播放器安装到项目所在的目录中

Answer 3

另外，我建议您自己使用chrome。您只需右键单击您想要抓取的任何内容，然后转到inspect element。它会将您带到html中该元素所在的确切位置。在本例中，您首先希望找出所有结果清单的根在哪里。当您找到它时，您希望指定元素，最好是指定一个惟一的属性来搜索它。在本例中，根元素为

public class ScanWebSO 
    {
    public static void main (String args[])
    {
        Document doc;
        try{
            doc =        Jsoup.connect("https://www.google.com/search?as_q=&as_epq=%22Yorkshire+Capital%22+&as_oq=fraud+OR+allegations+OR+scam&as_eq=&as_nlo=&as_nhi=&lr=lang_en&cr=countryCA&as_qdr=all&as_sitesearch=&as_occt=any&safe=images&tbs=&as_filetype=&as_rights=").userAgent("Mozilla").ignoreHttpErrors(true).timeout(0).get();
            Elements links = doc.select("li[class=g]");
            for (Element link : links) {
                Elements titles = link.select("h3[class=r]");
                String title = titles.text();
    
                Elements bodies = link.select("span[class=st]");
                String body = bodies.text();
    
                System.out.println("Title: "+title);
                System.out.println("Body: "+body+"\n");
            }
        }
        catch (IOException e) {
            e.printStackTrace();
        }
    }
    }