Desktop ScreenRect crash error

[agoraio-extensions]

Desktop ScreenRect crash error

[Arlen-LT]

I am using Unity 2020.3.30f1 version. I installed Agora SDK and started screen sharing. I used the StartScreenCaptureByScreenRect function to share the monitor area and Unity crashes.

What's the problem?

I have 2 monitors and each has a different resolution.

hi @seungsunkim could you pls share the crash stack trace with us?

I have solved this by realloc the buffer size.
In the VideoSurface.cs of the demo, there is a constexpr private System.IntPtr data = Marshal.AllocHGlobal(1920 * 1080* 4);
For the client(audience, receiver):
It will crash while the size of buffer sent by the native method updateVideoRawData is greater than the allocated size.
For the server(broadcaster, sender):
The third parameter of method StartScreenCaptureByScreenRect is the struct ScreenCaptureParameters.
It will crash while the ScreenCaptureParameters.dimensions.width * ScreenCaptureParameters.dimensions.height is greater than the allocated size.

[plutoless]

hi @seungsunkim could you pls share the crash stack trace with us?

[Arlen-LT]

hi @seungsunkim could you pls share the crash stack trace with us?

This issue also happens on me with Unity 2020.3.2f1.
And the stacktrace is as bellow:

Stacktrace:

at <0xffffffff>
at (wrapper managed-to-native) agora_gaming_rtc.IRtcEngineNative.updateVideoRawData (intptr,uint) [0x0000a] in :0
at agora_gaming_rtc.VideoRender.UpdateVideoRawData (uint,intptr,int&,int&) [0x00013] in D:\Agora_Unity_SDK_FULL\samples\Hello-Video-Unity-Agora\Assets\AgoraEngine\Scripts\AgoraGamingSDK\videoRender\VideoRender.cs:93
at agora_gaming_rtc.VideoSurface.Update () [0x000f4] in D:\Agora_Unity_SDK_FULL\samples\Hello-Video-Unity-Agora\Assets\AgoraEngine\Scripts\AgoraGamingSDK\videoRender\VideoSurface.cs:122
at (wrapper runtime-invoke) object.runtime_invoke_void__this__ (object,intptr,intptr,intptr) [0x00020] in <695d1cc93cca45069c528c15c9fdd749>:0

=================================================================
Got a SIGSEGV while executing native code. This usually indicates
a fatal error in the mono runtime or one of the native libraries
used by your application.

Received signal SIGSEGV
Stack trace:
0x00007ffb7f6b7e46 (agoraSdkCWrapper) deleteEngine
0x0000018ba2f5db86 (Mono JIT Code) (wrapper managed-to-native) agora_gaming_rtc.IRtcEngineNative:updateVideoRawData (intptr,uint)
0x0000018ba2f5d973 (Mono JIT Code) [VideoRender.cs:93] agora_gaming_rtc.VideoRender:UpdateVideoRawData (uint,intptr,int&,int&)
0x0000018ba2ef786b (Mono JIT Code) [VideoSurface.cs:122] agora_gaming_rtc.VideoSurface:Update ()
0x0000018b94aed3f8 (Mono JIT Code) (wrapper runtime-invoke) object:runtime_invoke_void__this__ (object,intptr,intptr,intptr)
0x00007ffb9e79f280 (mono-2.0-bdwgc) [mini-runtime.c:2827] mono_jit_runtime_invoke
0x00007ffb9e722ac2 (mono-2.0-bdwgc) [object.c:2921] do_runtime_invoke
0x00007ffb9e72bb1f (mono-2.0-bdwgc) [object.c:2968] mono_runtime_invoke
0x00007ff7172e29c4 (Unity) scripting_method_invoke
0x00007ff7172daeb5 (Unity) ScriptingInvocation::Invoke
0x00007ff7172865f4 (Unity) MonoBehaviour::CallMethodIfAvailable
0x00007ff7172866fc (Unity) MonoBehaviour::CallUpdateMethod
0x00007ff71673d398 (Unity) BaseBehaviourManager::CommonUpdate
0x00007ff7167472ea (Unity) BehaviourManager::Update
0x00007ff716bbb73d (Unity) InitPlayerLoopCallbacks'::2'::UpdateScriptRunBehaviourUpdateRegistrator::Forward
0x00007ff716b9c19c (Unity) ExecutePlayerLoop
0x00007ff716b9c273 (Unity) ExecutePlayerLoop
0x00007ff716ba30a9 (Unity) PlayerLoop
0x00007ff717ffc4a1 (Unity) PlayerLoopController::UpdateScene
0x00007ff717ffa109 (Unity) Application::TickTimer
0x00007ff71899b4a1 (Unity) MainMessageLoop
0x00007ff71899f4e1 (Unity) WinMain
0x00007ff71a7fdef6 (Unity) __scrt_common_main_seh
0x00007ffc2db854e0 (KERNEL32) BaseThreadInitThunk
0x00007ffc2eea485b (ntdll) RtlUserThreadStart

[icywind]

@Arlen-LT - not sure if you only want to share an area of the screen or it is the display you want to share. In the latest SDK version, you may call startScreenCaptureForDisplay() now for the display capture.