Linux editor, webRTC lib not compatible (crash)

[antoined73]

First of all, thank you for all your hard work to deliver this awesome package ! It will greatly enhance and ease the devlopment of our company product.

We encountered this issue when installing the WebRTC package on the linux Unity Editor :

It seems that the webrtc lib references a lib not present on linux systems (libc++.so).
Tested on 2 differents Ubuntu PCs, same result.

Do you have any idea how to fix this ?
Thanks

[stevenh]

Have your tried
sudo apt install libc++-dev

[antoined73]

On Ubuntu - Virtual machine :
libc++-dev installed => Linux editor crashes on launch (the editor log says it misses the cuda lib)
libcuda1-384 installed => Editor launches, can play the scene, but the editor crashes as soon as I launch a web rtc call
I think all this problems are just limitations of VMs that does not provide the NVIDIA VIDEO CODEC SDK.

terminate called after throwing an instance of 'unity::webrtc::CodecInitializationResult'
Caught fatal signal - signo:6 code:-6 errno:0 addr:0x3e800003f5f
Obtained 15 stack frames.
#0  0x007f8428e098a0 in funlockfile
#1  0x007f8428a44f47 in gsignal
#2  0x007f8428a468b1 in abort
#3  0x005638b4ebcc05 in __gnu_cxx::__verbose_terminate_handler()
#4  0x005638b4eb0ae6 in __cxxabiv1::__terminate(void (*)())
#5  0x005638b4eb0b31 in std::terminate()
#6  0x005638b4ebcfa3 in __cxa_throw
#7  0x007f8315bb60b4 in unity::webrtc::NvEncoder::InitV()
#8  0x007f8315bb5187 in unity::webrtc::EncoderFactory::Init(int, int, unity::webrtc::IGraphicsDevice*, unity::webrtc::UnityEncoderType, UnityRenderingExtTextureFormat)
#9  0x007f8315ba942c in OnRenderEvent(int, void*)
#10 0x005638b289ec9a in RenderingCommandBuffer::ExecuteCommandBufferWithState(ShaderPassContext&, RenderNodeQueue&, RenderingCommandBufferState*, unsigned int, ComputeQueueType) const
#11 0x005638b289d484 in RenderingCommandBuffer::ExecuteCommandBuffer(ShaderPassContext&, RenderNodeQueue&, unsigned int, dynamic_array<std::pair<ShaderLab::FastPropertyName, RenderTexture*>, 0ul>*, ComputeQueueType, RenderTexture*) const
#12 0x005638b2732bad in ExecuteCommandBufferFromScriptImpl(RenderingCommandBuffer*, ComputeQueueType, ScriptingExceptionPtr*)
#13 0x005638b3224635 in Graphics_CUSTOM_ExecuteCommandBuffer(ScriptingBackendNativeObjectPtrOpaque*)
#14 0x0000004258a022 in (wrapper managed-to-native) UnityEngine.Graphics:ExecuteCommandBuffer (UnityEngine.Rendering.CommandBuffer)
Launching bug reporter
QObject: Cannot create children for a parent that is in a different thread.
(Parent is QObject(0x259e020), parent's thread is QThread(0x23dc330), current thread is Thread(0x26e3460)
/home/<username>/Unity/Hub/Editor/2019.4.18f1/Editor/Data/Resources/PackageManager/Server/node_modules/winston/lib/winston/logger.js:307
      throw ex;

On native Ubuntu :
Same result, only libc++-dev was needed on install, but as soon as the webrtc call is emitted, the same crash seems to occur :

terminate called after throwing an instance of 'unity::webrtc::CodecInitializationResult'
Caught fatal signal - signo:6 code:-6 errno:0 addr:0x3e800004d97
Obtained 15 stack frames.
#0  0x007efcd67cc8a0 in funlockfile
#1  0x007efcd6407f47 in gsignal
#2  0x007efcd64098b1 in abort
#3  0x00560a01f51c05 in __gnu_cxx::__verbose_terminate_handler()
#4  0x00560a01f45ae6 in __cxxabiv1::__terminate(void (*)())
#5  0x00560a01f45b31 in std::terminate()
#6  0x00560a01f51fa3 in __cxa_throw
#7  0x007efbbeb000b4 in unity::webrtc::NvEncoder::InitV()
#8  0x007efbbeaff187 in unity::webrtc::EncoderFactory::Init(int, int, unity::webrtc::IGraphicsDevice*, unity::webrtc::UnityEncoderType, UnityRenderingExtTextureFormat)
#9  0x007efbbeaf342c in OnRenderEvent(int, void*)
#10 0x005609ff933c9a in RenderingCommandBuffer::ExecuteCommandBufferWithState(ShaderPassContext&, RenderNodeQueue&, RenderingCommandBufferState*, unsigned int, ComputeQueueType) const
#11 0x005609ff932484 in RenderingCommandBuffer::ExecuteCommandBuffer(ShaderPassContext&, RenderNodeQueue&, unsigned int, dynamic_array<std::pair<ShaderLab::FastPropertyName, RenderTexture*>, 0ul>*, ComputeQueueType, RenderTexture*) const
#12 0x005609ff7c7bad in ExecuteCommandBufferFromScriptImpl(RenderingCommandBuffer*, ComputeQueueType, ScriptingExceptionPtr*)
#13 0x00560a002b9635 in Graphics_CUSTOM_ExecuteCommandBuffer(ScriptingBackendNativeObjectPtrOpaque*)
#14 0x00000041f84432 in (wrapper managed-to-native) UnityEngine.Graphics:ExecuteCommandBuffer (UnityEngine.Rendering.CommandBuffer)
Launching bug reporter
QObject: Cannot create children for a parent that is in a different thread.
(Parent is QObject(0x1c48880), parent's thread is QThread(0x1b42320), current thread is Thread(0x1be8230)
/home/<username>/dev/unity/2019.4.18f1/Editor/Data/Resources/PackageManager/Server/node_modules/winston/lib/winston/logger.js:307
      throw ex;

Thanks for the help @stevenh !

[karasusan]

@antoined73
Is the Unity editor detecting the graphics driver?
It can be checked by the Editor.log.

[karasusan]

@antoined73
Hi, any updates? Please try the latest version of the package.
If you have no problem, I will close this ticket.

[antoined73]

I have no more this issue for a while now. I guess it has been fixed !