Fail to play rtp stream

[orency]

Describe the bug
When i try to play some multicast streams from my ISP,link is such as rtp://239.49.0.1:1234.
it just can not play with a black screen and shows error
[1004]ERROR_CODE_FAILED_RUNTIME_CHECK
Then I have tried change the protocal prefix from rtp:// to udp://,it also can not play.
I have checked the link validity by the VLC on same phone.

Expected behavior
can play multicast stream normally without any glich

Smartphone (please complete the following information):

• OS: [Android 10]
• Version [1.14.0-beta11]

Additional context
Also when I first time import the rtp m3u playlist ,it crashed with logs below.It doesn't crash the second time.

android.app.RemoteServiceException:
Bad notification for startForeground
at 
android. app. ActivityThread$H. handleMessage (ActivityThread. java:1973)
at
android.os.Handler. dispatchMessage (Handler. java:107) at android.os. Looper. loop(Looper. java:223)
at
android. app.ActivityThread.main(ActivityThread. java:7562)
at
java. lang.reflect.Method. invoke(Native Method)
at
com. android. internal. os. RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:539)
at
com.android. internal.os.ZygoteInit.main(ZygoteInit.java:950)

And sadly it also can not save the crash log normally,I have to outport it with a OCR engine.

And when input m3u name and subscribe url if there is a (2) in link ,it displays as ②.
I don't know it is a feature or bug, and this confuse me some time.

https stream on same phone can import and play normally.