FATAL EXCEPTION: main

[chrome1235]

I created this project, but I am getting this exception on a Android Phone. How can I solve this problem? Thanks for your help.

D/FlutterWebRTCPlugin( 6143): Create front camera Camera 1, Facing front, Orientation 270 succeeded I/org.webrtc.Logging( 6143): EglBase14Impl: Using OpenGL ES version 2 D/AndroidRuntime( 6143): Shutting down VM E/AndroidRuntime( 6143): FATAL EXCEPTION: main E/AndroidRuntime( 6143): Process: com.example.videosdk_flutter_quickstart, PID: 6143 E/AndroidRuntime( 6143): java.lang.NullPointerException: Attempt to invoke interface method 'void org.webrtc.VideoCapturer.initialize(org.webrtc.SurfaceTextureHelper, android.content.Context, org.webrtc.CapturerObserver)' on a null object reference E/AndroidRuntime( 6143): at com.cloudwebrtc.webrtc.GetUserMediaImpl.getUserVideo(GetUserMediaImpl.java:730) E/AndroidRuntime( 6143): at com.cloudwebrtc.webrtc.GetUserMediaImpl.getUserMedia(GetUserMediaImpl.java:597) E/AndroidRuntime( 6143): at com.cloudwebrtc.webrtc.GetUserMediaImpl.access$000(GetUserMediaImpl.java:84) E/AndroidRuntime( 6143): at com.cloudwebrtc.webrtc.GetUserMediaImpl$1.invoke(GetUserMediaImpl.java:456) E/AndroidRuntime( 6143): at com.cloudwebrtc.webrtc.GetUserMediaImpl.lambda$requestPermissions$1(GetUserMediaImpl.java:849) E/AndroidRuntime( 6143): at com.cloudwebrtc.webrtc.GetUserMediaImpl$$ExternalSyntheticLambda0.invoke(Unknown Source:6) E/AndroidRuntime( 6143): at com.cloudwebrtc.webrtc.utils.PermissionUtils$1.onReceiveResult(PermissionUtils.java:115) E/AndroidRuntime( 6143): at android.os.ResultReceiver$MyRunnable.run(ResultReceiver.java:50) E/AndroidRuntime( 6143): at android.os.Handler.handleCallback(Handler.java:873) E/AndroidRuntime( 6143): at android.os.Handler.dispatchMessage(Handler.java:99) E/AndroidRuntime( 6143): at android.os.Looper.loop(Looper.java:207) E/AndroidRuntime( 6143): at android.app.ActivityThread.main(ActivityThread.java:6878) E/AndroidRuntime( 6143): at java.lang.reflect.Method.invoke(Native Method) E/AndroidRuntime( 6143): at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:547) E/AndroidRuntime( 6143): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:876) I/Process ( 6143): Sending signal. PID: 6143 SIG: 9 Lost connection to device.

[ishabodiwala]

Hey @chrome1235, When you get this error ? Can you share re-producible steps for the same ?

[chrome1235]

Thank you for your reply. Steps are: 1- Cloned from https://github.com/videosdk-live/quickstart/tree/main/flutter-rtc 2- flutter pub get 3- replaced token in api_call.dart with my token. // const token = ''; const token = "eyJhbGciOiJ.........."; 4- on main screen create meeting button.

5- On Last screen, about 3-4 seconds app is halted.

It gives that error.

Meanwhile I can see the the sessions in the dashboard (https://app.videosdk.live/meetings/sessions).

[ishabodiwala]

@chrome1235 , On which device are you testing? Can you also try using another Android device with android version 10 or higher?

[chrome1235]

@chrome1235 , On which device are you testing? Can you also try using another Android device with android version 10 or higher? xiaomi, android version 9. i will try version 10. thanks for your information.

[chrome1235]

Hi ishabodiwala After your message, I deployed to another Xiomi phone (android version was 12). It worked without any problem. Is there any solution for android 9 version?

[ishabodiwala]

@chrome1235 , I am able to reproduce this error, and its look like it is related to specific android version. We will fixed that very soon, till then you can pass customTrack in VideoSDK.createRoom() and _room.enableCam() method to resolve this issue. like this :

 CustomTrack videoTrack = await VideoSDK.createCameraVideoTrack(
      encoderConfig: CustomVideoTrackConfig.h720p_w1280p,
      multiStream: false,
    );

VideoSDK.createRoom(
    //...
   customCameraVideoTrack: videoTrack, 
);

CustomTrack videoTrack = await VideoSDK.createCameraVideoTrack(
      encoderConfig: CustomVideoTrackConfig.h720p_w1280p,
      multiStream: false,
    );

_room.enableCam(videoTrack);

You can change value of encoderConfig and multiStream accroding to your requirement. Please refer followed documentation to know more about customTrack : https://docs.videosdk.live/flutter/guide/video-and-audio-calling-api-sdk/render-media/optimize-video-track

[chrome1235]

@ishabodiwala It worked! Thanks for your support. I changed, meeting_screen.dart like this.

1)

  late final CustomTrack videoTrack;
  @override
  void initState() {
    // create room
    WidgetsBinding.instance.addPostFrameCallback((_) async {
      videoTrack = await VideoSDK.createCameraVideoTrack(
        encoderConfig: CustomVideoTrackConfig.h720p_w1280p,
        multiStream: false,
      );
      _room = VideoSDK.createRoom(
        roomId: widget.meetingId,
        token: widget.token,
        displayName: "John Doe",
        micEnabled: micEnabled,
        camEnabled: camEnabled,
        defaultCameraIndex:
        1, // Index of MediaDevices will be used to set default camera
        customCameraVideoTrack: videoTrack,
      );
      setMeetingEventListener();
      // Join room
      _room.join();

    });
    super.initState();
  }

2)

      onToggleCameraButtonPressed: () {
        camEnabled ? _room.disableCam() : _room.enableCam(videoTrack);
        camEnabled = !camEnabled;
      },