我想使用RTSP从IP摄像头接收实时流，但是我得到了'无法播放此视频'的提示，并且出现了以下异常：
07-16 14:06:26.945: D/MediaPlayer(19411): setDataSource IOException happend :
07-16 14:06:26.945: D/MediaPlayer(19411): java.io.FileNotFoundException: No content provider: rtsp://192.168.30.108:554
07-16 14:06:26.945: D/MediaPlayer(19411): at android.content.ContentResolver.openTypedAssetFileDescriptor(ContentResolver.java:1052)
07-16 14:06:26.945: D/MediaPlayer(19411): at android.content.ContentResolver.openAssetFileDescriptor(ContentResolver.java:907)
07-16 14:06:26.945: D/MediaPlayer(19411): at android.content.ContentResolver.openAssetFileDescriptor(ContentResolver.java:834)
07-16 14:06:26.945: D/MediaPlayer(19411): at android.media.MediaPlayer.setDataSource(MediaPlayer.java:973)
07-16 14:06:26.945: D/MediaPlayer(19411): at android.widget.VideoView.openVideo(VideoView.java:337)
07-16 14:06:26.945: D/MediaPlayer(19411): at android.widget.VideoView.setVideoURI(VideoView.java:247)
07-16 14:06:26.945: D/MediaPlayer(19411): at android.widget.VideoView.setVideoURI(VideoView.java:237)
07-16 14:06:26.945: D/MediaPlayer(19411): at com.example.video_rtsp.MainActivity$2.run(MainActivity.java:59)
07-16 14:06:26.945: D/MediaPlayer(19411): at android.os.Handler.handleCallback(Handler.java:733)
07-16 14:06:26.945: D/MediaPlayer(19411): at android.os.Handler.dispatchMessage(Handler.java:95)
07-16 14:06:26.945: D/MediaPlayer(19411): at android.os.Looper.loop(Looper.java:157)
07-16 14:06:26.945: D/MediaPlayer(19411): at android.app.ActivityThread.main(ActivityThread.java:5293)
07-16 14:06:26.945: D/MediaPlayer(19411): at java.lang.reflect.Method.invokeNative(Native Method)
07-16 14:06:26.945: D/MediaPlayer(19411): at java.lang.reflect.Method.invoke(Method.java:515)
07-16 14:06:26.945: D/MediaPlayer(19411): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1265)
07-16 14:06:26.945: D/MediaPlayer(19411): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1081)
07-16 14:06:26.945: D/MediaPlayer(19411): at dalvik.system.NativeStart.main(Native Method)
07-16 14:06:26.945: D/MediaPlayer(19411): Couldn't open file on client side, trying server side
07-16 14:06:26.955: V/MediaPlayer(19411): setVideoSurfaceTexture
07-16 14:06:26.955: V/MediaPlayer-JNI(19411): setAudioStreamType: 3
07-16 14:06:26.955: V/MediaPlayer(19411): MediaPlayer::setAudioStreamType
07-16 14:06:26.955: V/MediaPlayer(19411): setVideoSurfaceTexture
07-16 14:06:26.955: V/MediaPlayer(19411): prepareAsync
07-16 14:06:26.965: D/ProgressBar(19411): setProgressDrawable drawableHeight = 48
07-16 14:06:26.985: D/AbsSeekBar(19411): AbsSeekBar Constructor: misSeebarAnimationAvailable = true
我使用以下方法：
VideoView videoView = (VideoView) ((Activity) ctx).findViewById(R.id.videoView);
//add controls to a MediaPlayer like play, pause.
MediaController mc = new MediaController(ctx);
videoView.setMediaController(mc);
//Set the path of Video or URI
videoView.setVideoURI(Uri.parse("rtsp://192.168.30.108:554"));
//Set the focus
videoView.requestFocus();
我不能确定这是否是问题，但我认为可能是因为相机软件需要进行身份验证，但如果是这样的话，我不知道如何向其提供身份验证。
在使用setDataSource时，使用MediaPlayer后，我得到了以下异常：
07-21 12:04:11.677: W/System.err(17714): java.io.IOException: Prepare failed.: status=0x1
07-21 12:04:11.677: W/System.err(17714): at android.media.MediaPlayer.prepare(Native Method)
我不确定这是否与设置标头的方式有关：
Uri uri = Uri.parse("rtsp://192.168.30.108:554");
Map<String , String> headres = new HashMap<String, String>();
headres.put("Authorization", "Basic ce0ca0f0864513c28c7be98f0f929be7b1f5db79"); //Also tried it without "Basic"
headres.put("encryption", "Default");
headres.put("mac", "9002A9D89200");
headres.put("random", "1715377261");
headres.put("realm", "Login to 90:02:a9:d8:92:00");
mediaPlayer.setDataSource(getApplicationContext(), uri, headres);
以下是使用Firebug获取登录过程中的头部信息和JSON数据的截图：
rtsp://username:password@192.168.30.108:554而不是rtsp://192.168.30.108:554。 - Levite