Displaying live UDP or RTP stream (multicast) on A

I am new to Android development since a few weeks, and I need to write an app that can display the user a live stream multicasted in UDP or RDP. The stream is located at an address such as "rtp://230.0.0.11:1234", and is emitted by WIFI thanks to this module : http://www.ikusi.es/public/ctrl_public_prod.php?accion=verProducto&id_familia=34&id_gama=186&id_producto=351

I already tried to read it from a player (Daroon player, from PlayStore), and it worked well, so I assume that my foolowing problem is not due to the broadcast.

I saw that it is possible to display video content to the user by different ways :

Using a new Intent with an ACTION_VIEW, and Android selects an app that can view the content;
Using the MediaPlayer class and VideoView.

I have two issues, let us start with the most important : - For both solution above, there is an issue : I read everywhere that MediaPlayer only support http/s and rtsp protocols, is that right? And for the action view here is what I tried before :

    Uri streamURL = Uri.parse("rtp://230.0.0.11:1234");
    Intent streamIntent = new Intent(Intent.ACTION_VIEW);
    streamIntent.setData(streamURL);
//  streamIntent.setDataAndType(streamURL,"video/*");   
    startActivity(streamIntent);

Here is the LogCat :

07-11 00:25:58.119: D/AndroidRuntime(2659): Shutting down VM
07-11 00:25:58.119: W/dalvikvm(2659): threadid=1: thread exiting with uncaught exception (group=0x40015560)
07-11 00:25:58.129: E/AndroidRuntime(2659): FATAL EXCEPTION: main
07-11 00:25:58.129: E/AndroidRuntime(2659): java.lang.IllegalStateException: Could not execute method of the activity
07-11 00:25:58.129: E/AndroidRuntime(2659):     at android.view.View$1.onClick(View.java:2144)
07-11 00:25:58.129: E/AndroidRuntime(2659):     at android.view.View.performClick(View.java:2485)
07-11 00:25:58.129: E/AndroidRuntime(2659):     at android.view.View$PerformClick.run(View.java:9080)
07-11 00:25:58.129: E/AndroidRuntime(2659):     at android.os.Handler.handleCallback(Handler.java:587)
07-11 00:25:58.129: E/AndroidRuntime(2659):     at android.os.Handler.dispatchMessage(Handler.java:92)
07-11 00:25:58.129: E/AndroidRuntime(2659):     at android.os.Looper.loop(Looper.java:123)
07-11 00:25:58.129: E/AndroidRuntime(2659):     at android.app.ActivityThread.main(ActivityThread.java:3683)
07-11 00:25:58.129: E/AndroidRuntime(2659):     at java.lang.reflect.Method.invokeNative(Native Method)
07-11 00:25:58.129: E/AndroidRuntime(2659):     at java.lang.reflect.Method.invoke(Method.java:507)
07-11 00:25:58.129: E/AndroidRuntime(2659):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
07-11 00:25:58.129: E/AndroidRuntime(2659):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
07-11 00:25:58.129: E/AndroidRuntime(2659):     at dalvik.system.NativeStart.main(Native Method)
07-11 00:25:58.129: E/AndroidRuntime(2659): Caused by: java.lang.reflect.InvocationTargetException
07-11 00:25:58.129: E/AndroidRuntime(2659):     at java.lang.reflect.Method.invokeNative(Native Method)
07-11 00:25:58.129: E/AndroidRuntime(2659):     at java.lang.reflect.Method.invoke(Method.java:507)
07-11 00:25:58.129: E/AndroidRuntime(2659):     at android.view.View$1.onClick(View.java:2139)
07-11 00:25:58.129: E/AndroidRuntime(2659):     ... 11 more
07-11 00:25:58.129: E/AndroidRuntime(2659): Caused by: android.content.ActivityNotFoundException: No Activity found to handle Intent { act=android.intent.action.VIEW dat=rtp://230.0.0.11:1234 }
07-11 00:25:58.129: E/AndroidRuntime(2659):     at android.app.Instrumentation.checkStartActivityResult(Instrumentation.java:1409)
07-11 00:25:58.129: E/AndroidRuntime(2659):     at android.app.Instrumentation.execStartActivity(Instrumentation.java:1379)
07-11 00:25:58.129: E/AndroidRuntime(2659):     at android.app.Activity.startActivityForResult(Activity.java:2827)
07-11 00:25:58.129: E/AndroidRuntime(2659):     at android.app.Activity.startActivity(Activity.java:2933)
07-11 00:25:58.129: E/AndroidRuntime(2659):     at fr.infosat.tvreplay.MainActivity.listStream(MainActivity.java:35)
07-11 00:25:58.129: E/AndroidRuntime(2659):     ... 14 more
07-11 00:26:00.079: I/Process(2659): Sending signal. PID: 2659 SIG: 9

My understanding is that the error InvocationTargetException, usually due to error on class names, cannot be resolved directly here, since I don't call any class in startActivity. However I think my syntax is not correct, maybe the method is not the right one to use. Of course if I uncomment the setDataAndType line, it displays the same error.

I noticed the error come when I launch my implicit intent.

My second problem is that Daroon Player works well on my set top box, I can see my stream on my TV. But when I try to launch it from Eclipse emulator, it doesn't play, even if I can play it from VLC... Is the emulator powerful enough to read those kind of stream?

I hope that you have some clues on how to solve that! :)

回答1:

First, you get the exception because there is no app installed on your device which can handle such an rtp:// url.

You may want to check the intent before you start it: queryIntentActivities(..)

Second, I think emulator is pretty slow compared to any available real device, you may not want to use emulator to test A/V streaming.

回答2:

VLC Android SDK works really perfect in UDP/RTP

https://code.videolan.org/videolan/vlc-android