How to play audio only from video file on Android?

问题

I have mp4 and wmv movie files and need to play only sound not video screen. How to do it?? Could I get sound track from movie file??

I know if I hide the SurfaceView from screen, I can only hear sound.. but I have tried a lot but.. it is impossible.

If you have any solution to extract sound track from movie file, please let me know..

Thanks in advance.

回答1:

If you are using the mediaplayer API in your app then don't call the API public void setDisplay (SurfaceHolder sh). This will ensure that only the audio is played out even if the video content is present..

More info in android doc here

回答2:

Use following code, Optimize following code as per your requirement. It play video from youtube.

try {
            final MediaPlayer m = new MediaPlayer();
            Thread t = new Thread(new Runnable() {

                public void run() {
                    try {
                        m.setDataSource("rtsp://v8.cache3.c.youtube.com/CjgLENy73wIaLwlQP1m32SiSYxMYJCAkFEIJbXYtZ29vZ2xlSARSB3JlbGF0ZWRggqG7w9aS2-1MDA==/0/0/0/video.3gp");
                        m.prepare();
                        m.start();  
                    } catch (Exception e) {
                        e.printStackTrace();
                    }

                }
            });
            t.start();

        } catch (Exception e) {
            e.printStackTrace();
        }

来源：https://stackoverflow.com/questions/6056034/how-to-play-audio-only-from-video-file-on-android