J2ME RTSP视频流，但无音频

Question

我关注了诺基亚的维基百科关于用J2Me创建视频播放器的事情。一般来说，代码是这样的

player = Manager.createPlayer("rtsp://v1.cache5.c.youtube.com/CjYLENy73wIaLQm8E_KpEOI9cxMYDSANFEIJbXYtZ29vZ2xlSARSBXdhdGNoYLm0hv_ig5HRTww=/0/0/0/video.3gp");               

                  //A player listener is needed so that we know, when the video has reached the END_OF_MEDIA position
            player.addPlayerListener(this);
            player.realize();
            player.prefetch();

          //The duration of the video
            duration = player.getDuration();

            //The video control instance is created and attached to this Canvas in Full SCreen mode
            vc = (VideoControl)player.getControl("VideoControl");

            voc = (VolumeControl)player.getControl("VolumeControl");
            voc.setLevel(100);
            voc.setMute(false);


            vc.initDisplayMode(VideoControl.USE_DIRECT_VIDEO, this);
            vc.setDisplaySize(240, 196);
            //vc.setDisplayFullScreen(true);

            vc.setVisible(true);





           // vc.setDisplayFullScreen(true);
            //next time the above operations will be skipped
            firstPlay = false;

          //A new thread handles the move of the cursor while the video progresses. 
            //The thread is distroyed when the video is stopped.
            thread = new Thread(this);
            thread.start();

目前我为诺基亚Asha 311开发。如果我只是通过浏览器打开rtsp地址，本地视频播放器将弹出并将视频与音频一起流式传输，使用此代码，视频流平滑，但根本没有声音。

我做错什么了吗？感谢你的帮助

问候

Answer 1

要流式播放youtube视频，您可以使用以下代码：

import javax.microedition.lcdui.*;
import javax.microedition.midlet.*;
import javax.microedition.media.*;
import javax.microedition.media.control.VideoControl;

public class RTSPFullScreen extends MIDlet implements CommandListener, PlayerListener {

    private Display d;
    private Player p;
    private Canvas c;
    private Command exitCommand = new Command("Exit", Command.EXIT, 1);
    VideoControl vc;

    public RTSPFullScreen() {

        d = Display.getDisplay(this);


    }

    public void startApp() {
        c = new Canvas() {

            protected void paint(Graphics g) {

                g.setColor(0, 0, 0);
                g.fillRect(0, 0, getWidth(), getHeight());


            }
        };

        c.setFullScreenMode(true);
        c.addCommand(exitCommand);
        c.setCommandListener(this);
        d.setCurrent(c);




        try {
           p = Manager.createPlayer("rtsp://v1.cache5.c.youtube.com/CjYLENy73wIaLQm8E_KpEOI9cxMYDSANFEIJbXYtZ29vZ2xlSARSBXdhdGNoYLm0hv_ig5HRTww=/0/0/0/video.3gp");


            p.addPlayerListener(this);
            p.start();

            vc = (VideoControl) p.getControl("javax.microedition.media.control.VideoControl");
            vc.initDisplayMode(VideoControl.USE_DIRECT_VIDEO, c);



        } catch (Exception e) {
            showAlert("startApp: " + e.toString());
        }
    }

    public void commandAction(Command c, Displayable s) {
        if (c == exitCommand) {
            destroyApp(false);
            notifyDestroyed();
        }
    }

    public void pauseApp() {
    }

    public void destroyApp(boolean uc) {
        if (p != null) {
            p.close();
        }
    }

    public void playerUpdate(Player player, java.lang.String event, java.lang.Object eventData) {
        if (player.getState() == Player.STARTED) {

            try {

                vc.setDisplayFullScreen(true);
                vc.setVisible(true);
            } catch (Exception e) {
                showAlert("playerUpdate: " + e.toString());
            }
        }

    }

    public void showAlert(String aAlertText) {
        Alert alert = new Alert("Alert", aAlertText, null, AlertType.ERROR);
        alert.setTimeout(10000);
        d.setCurrent(alert);
    }
}