irajsb / ue_capturesubsystem Goto Github PK

Hi. When capturing for longer periods of time, the RAM starts to fill up. This is especially noticeable when capturing at 120 fps, where the RAM fills up at around 200MB/s. This isn't surprising. However, after ending capture, the memory that was used up is not freed.

This is the graph of my RAM, total memory usage is pretty constant, then during capturing it rises up quickly, and then stays static again.
I tried debugging this, and the program calls the Encode_Finish method of the CaptureSubsystemDirector at the end of the capturing, where it seems that most of the memory should be freed. The UE5 project used is just the default Third Person Game, and the only code is this

Just to note, I've tried running the same code with the output file being the recommended video file name instead of an RTMP stream link, and the issue persists. Also, the same issue is present when capturing at 30 fps, albeit slower.
Related question: Is there any way to free up memory during capturing in the case of encoding an RTMP stream, or is there a recommended method of doing this in an alternate way instead of just one continuous stream, as my goal is to make a live stream of an Unreal Engine application?

Whenever I try to start capture, it crashes the editor. The following is the crash log, is there any way to fix this problem? Thanks a lot!!

Unhandled Exception: EXCEPTION_ACCESS_VIOLATION reading address 0x000001a6000005c5

UnrealEditor_Engine
UnrealEditor_CaptureSubsystem!UCaptureSubsystemDirector::OnBackBufferReady_RenderThread() [D:\UE5Projects\RecordingTest\Plugins\CaptureSubsystem\Source\CaptureSubsystem\Private\CaptureSubsystemDirector.cpp:193]
UnrealEditor_CaptureSubsystem!TBaseUObjectMethodDelegateInstance<0,UCaptureSubsystemDirector,void __cdecl(SWindow &,TRefCountPtr const &),FDefaultDelegateUserPolicy>::ExecuteIfSafe() [D:\Program Files\UE_5.2\Engine\Source\Runtime\Core\Public\Delegates\DelegateInstancesImpl.h:552]
UnrealEditor_SlateRHIRenderer
UnrealEditor_SlateRHIRenderer
UnrealEditor_SlateRHIRenderer
UnrealEditor_Core
UnrealEditor_Core
UnrealEditor_RenderCore
UnrealEditor_RenderCore
UnrealEditor_Core
UnrealEditor_Core
kernel32
ntdll

Hi, I add this plugin into my project and set the start capture funtion when the game starts. It will crash and the callstack is below.

LoginId:a574e5434b40a4154f80ab8f9632a2b7
EpicAccountId:3d5a9c211f544f85b1345812ec162ebe

Unhandled Exception: EXCEPTION_ACCESS_VIOLATION reading address 0x00000000000004b0

UnrealEditor_D3D12RHI!FD3D12Texture::Lock() [D:\build++UE5\Sync\Engine\Source\Runtime\D3D12RHI\Private\D3D12Texture.cpp:1750]
UnrealEditor_D3D12RHI!FD3D12DynamicRHI::LockTexture2D_RenderThread() [D:\build++UE5\Sync\Engine\Source\Runtime\D3D12RHI\Private\D3D12Texture.cpp:2122]
UnrealEditor_CaptureSubsystem!UCaptureSubsystemDirector::GetScreenVideoData() [E:\Learn\TestCapture\Plugins\UE_CaptureSubsystem-master\Source\CaptureSubsystem\Private\CaptureSubsystemDirector.cpp:320]
UnrealEditor_CaptureSubsystem!UCaptureSubsystemDirector::OnBackBufferReady_RenderThread() [E:\Learn\TestCapture\Plugins\UE_CaptureSubsystem-master\Source\CaptureSubsystem\Private\CaptureSubsystemDirector.cpp:222]
UnrealEditor_CaptureSubsystem!TBaseUObjectMethodDelegateInstance<0,UCaptureSubsystemDirector,void __cdecl(SWindow &,TRefCountPtr const &),FDefaultDelegateUserPolicy>::ExecuteIfSafe() [F:\UnrealEngine\UE_5.1\Engine\Source\Runtime\Core\Public\Delegates\DelegateInstancesImpl.h:618]
UnrealEditor_SlateRHIRenderer!FSlateRHIRenderer::DrawWindow_RenderThread() [D:\build++UE5\Sync\Engine\Source\Runtime\SlateRHIRenderer\Private\SlateRHIRenderer.cpp:1418]
UnrealEditor_SlateRHIRenderer!TEnqueueUniqueRenderCommandType<FSlateRHIRenderer::DrawWindows_Private'::39'::SlateDrawWindowsCommandName,<lambda_f9feabdceba9d88a5c7b2ca3d59100d9> >::DoTask() [D:\build++UE5\Sync\Engine\Source\Runtime\RenderCore\Public\RenderingThread.h:206]
UnrealEditor_SlateRHIRenderer!TGraphTask<TEnqueueUniqueRenderCommandType<FSlateRHIRenderer::DrawWindows_Private'::39'::SlateDrawWindowsCommandName,<lambda_f9feabdceba9d88a5c7b2ca3d59100d9> > >::ExecuteTask() [D:\build++UE5\Sync\Engine\Source\Runtime\Core\Public\Async\TaskGraphInterfaces.h:1348]
UnrealEditor_Core!FNamedTaskThread::ProcessTasksNamedThread() [D:\build++UE5\Sync\Engine\Source\Runtime\Core\Private\Async\TaskGraph.cpp:760]
UnrealEditor_Core!FNamedTaskThread::ProcessTasksUntilQuit() [D:\build++UE5\Sync\Engine\Source\Runtime\Core\Private\Async\TaskGraph.cpp:649]
UnrealEditor_RenderCore!RenderingThreadMain() [D:\build++UE5\Sync\Engine\Source\Runtime\RenderCore\Private\RenderingThread.cpp:415]
UnrealEditor_RenderCore!FRenderingThread::Run() [D:\build++UE5\Sync\Engine\Source\Runtime\RenderCore\Private\RenderingThread.cpp:541]
UnrealEditor_Core!FRunnableThreadWin::Run() [D:\build++UE5\Sync\Engine\Source\Runtime\Core\Private\Windows\WindowsRunnableThread.cpp:149]

but If the ShowUI option is turned off, there is no problem.

Hi. It is what i can share from logs

[2023.11.30-13.03.33:255][669]LogCaptureSubsystem: Capturing Video
[2023.11.30-13.03.33:256][669]LogCaptureSubsystem: Creating Director
[2023.11.30-13.03.33:257][669]LogCaptureSubsystem: Creating Audio Encoder
[2023.11.30-13.03.33:290][672]LogCaptureSubsystem: Creating Encoder Thread
[2023.11.30-13.03.33:291][672]LogCaptureSubsystem: Creating Video encoder
[2023.11.30-13.03.33:291][672]LogCaptureSubsystem: nvenc added
[2023.11.30-13.03.35:362][672]LogWindows: Error: === Critical error: ===
[2023.11.30-13.03.35:363][672]LogWindows: Error:
[2023.11.30-13.03.35:363][672]LogWindows: Error: Fatal error!
[2023.11.30-13.03.35:363][672]LogWindows: Error:
[2023.11.30-13.03.35:363][672]LogWindows: Error: Unhandled Exception: EXCEPTION_ACCESS_VIOLATION reading address 0x0000000000000088
[2023.11.30-13.03.35:363][672]LogWindows: Error:
[2023.11.30-13.03.35:363][672]LogWindows: Error: [Callstack] 0x00007ffb1bb31425 avformat-59.dll!UnknownFunction []
[2023.11.30-13.03.35:363][672]LogWindows: Error: [Callstack] 0x00007ffb1bb5e2a7 avformat-59.dll!UnknownFunction []
[2023.11.30-13.03.35:363][672]LogWindows: Error: [Callstack] 0x00007ffb1bb60905 avformat-59.dll!UnknownFunction []
[2023.11.30-13.03.35:363][672]LogWindows: Error: [Callstack] 0x00007ffb1b561caa UnrealEditor-CaptureSubsystem.dll!UCaptureSubsystemDirector::Create_Video_Encoder() [D:\UnrealProjects\PolyCore5.1\Plugins\UE_CaptureSubsystem\Source\CaptureSubsystem\Private\CaptureSubsystemDirector.cpp:532]
[2023.11.30-13.03.35:363][672]LogWindows: Error: [Callstack] 0x00007ffb1b560295 UnrealEditor-CaptureSubsystem.dll!UCaptureSubsystemDirector::CreateEncodeThread() [D:\UnrealProjects\PolyCore5.1\Plugins\UE_CaptureSubsystem\Source\CaptureSubsystem\Private\CaptureSubsystemDirector.cpp:327]
[2023.11.30-13.03.35:363][672]LogWindows: Error: [Callstack] 0x00007ffb1b56b877 UnrealEditor-CaptureSubsystem.dll!UCaptureSubsystemDirector::OnBackBufferReady_RenderThread() [D:\UnrealProjects\PolyCore5.1\Plugins\UE_CaptureSubsystem\Source\CaptureSubsystem\Private\CaptureSubsystemDirector.cpp:205]
[2023.11.30-13.03.35:363][672]LogWindows: Error: [Callstack] 0x00007ffb1b56582c UnrealEditor-CaptureSubsystem.dll!TBaseUObjectMethodDelegateInstance<0,UCaptureSubsystemDirector,void __cdecl(SWindow &,TRefCountPtr const &),FDefaultDelegateUserPolicy>::ExecuteIfSafe() [E:\UE_5.1\Engine\Source\Runtime\Core\Public\Delegates\DelegateInstancesImpl.h:618]

Sorry
I dont have debug symbols yet

In desktop all is okay but it doesnt capture VR
Im talking about capturing VR from Windows (not mobile version)
Logs are pure, no errors or warnings

I just use StartCapture in Level Blueprint

LoginId:db6364de4234a01f75ca4b92b3cb168f
EpicAccountId:477dc34bc8ea42369e96133bb8eb6126

The error report display this.

Unhandled Exception: EXCEPTION_ACCESS_VIOLATION reading address 0x00007ff994ea82fb

VCRUNTIME140
UnrealEditor_Core!UE::String::Private::ConcatFStrings<FString const &,FString>() [D:\build\++UE5\Sync\Engine\Source\Runtime\Core\Private\Containers\String.cpp:676]
UnrealEditor_Core!FString::ConcatFF() [D:\build\++UE5\Sync\Engine\Source\Runtime\Core\Private\Containers\String.cpp:752]
UnrealEditor_CaptureSubsystem!<lambda_e774434e92df38bee76464832d9aaa7c>::operator()() [C:\Workspace\DBAIMetaHumanNewVersion\Project_Ari\Plugins\CaptureSubsystem\Source\CaptureSubsystem\Private\CaptureSubsystemDirector.cpp:951]
UnrealEditor_CaptureSubsystem!UE::Core::Private::Function::TFunctionRefCaller<<lambda_e774434e92df38bee76464832d9aaa7c>,void __cdecl(void)>::Call() [C:\Program Files\Epic Games\UE_5.2\Engine\Source\Runtime\Core\Public\Templates\Function.h:475]
UnrealEditor_Core!TGraphTask<FAsyncGraphTask>::ExecuteTask() [D:\build\++UE5\Sync\Engine\Source\Runtime\Core\Public\Async\TaskGraphInterfaces.h:1310]
UnrealEditor_Core!FNamedTaskThread::ProcessTasksNamedThread() [D:\build\++UE5\Sync\Engine\Source\Runtime\Core\Private\Async\TaskGraph.cpp:758]
UnrealEditor_Core!FNamedTaskThread::ProcessTasksUntilQuit() [D:\build\++UE5\Sync\Engine\Source\Runtime\Core\Private\Async\TaskGraph.cpp:649]
UnrealEditor_Core!FTaskGraphCompatibilityImplementation::WaitUntilTasksComplete() [D:\build\++UE5\Sync\Engine\Source\Runtime\Core\Private\Async\TaskGraph.cpp:2123]
UnrealEditor_Engine!FTickTaskSequencer::ReleaseTickGroup() [D:\build\++UE5\Sync\Engine\Source\Runtime\Engine\Private\TickTaskManager.cpp:556]
UnrealEditor_Engine!FTickTaskManager::RunTickGroup() [D:\build\++UE5\Sync\Engine\Source\Runtime\Engine\Private\TickTaskManager.cpp:1583]
UnrealEditor_Engine!UWorld::RunTickGroup() [D:\build\++UE5\Sync\Engine\Source\Runtime\Engine\Private\LevelTick.cpp:770]
UnrealEditor_Engine!UWorld::Tick() [D:\build\++UE5\Sync\Engine\Source\Runtime\Engine\Private\LevelTick.cpp:1512]
UnrealEditor_UnrealEd!UEditorEngine::Tick() [D:\build\++UE5\Sync\Engine\Source\Editor\UnrealEd\Private\EditorEngine.cpp:1905]
UnrealEditor_UnrealEd!UUnrealEdEngine::Tick() [D:\build\++UE5\Sync\Engine\Source\Editor\UnrealEd\Private\UnrealEdEngine.cpp:519]
UnrealEditor!FEngineLoop::Tick() [D:\build\++UE5\Sync\Engine\Source\Runtime\Launch\Private\LaunchEngineLoop.cpp:5812]
UnrealEditor!GuardedMain() [D:\build\++UE5\Sync\Engine\Source\Runtime\Launch\Private\Launch.cpp:188]
UnrealEditor!GuardedMainWrapper() [D:\build\++UE5\Sync\Engine\Source\Runtime\Launch\Private\Windows\LaunchWindows.cpp:107]
UnrealEditor!LaunchWindowsStartup() [D:\build\++UE5\Sync\Engine\Source\Runtime\Launch\Private\Windows\LaunchWindows.cpp:244]
UnrealEditor!WinMain() [D:\build\++UE5\Sync\Engine\Source\Runtime\Launch\Private\Windows\LaunchWindows.cpp:284]
UnrealEditor!__scrt_common_main_seh() [D:\a\_work\1\s\src\vctools\crt\vcstartup\src\startup\exe_common.inl:288]
kernel32
ntdll

and in crash report print log like this

[2024.03.13-08.25.01:561][ 69]LogCaptureSubsystem: Capturing Video
[2024.03.13-08.25.01:561][ 69]LogCaptureSubsystem: Creating Director
[2024.03.13-08.25.01:561][ 69]LogCaptureSubsystem: Creating Audio Encoder 
[2024.03.13-08.25.01:562][ 69]LogBlueprintUserMessages: [LV_AIStudio_C_3] Capture start
[2024.03.13-08.25.01:594][ 73]LogTemp: Creating Encoder
[2024.03.13-08.25.01:594][ 73]LogCaptureSubsystem: Creating Encoder Thread
[2024.03.13-08.25.01:594][ 73]LogCaptureSubsystem: Creating Video encoder
[2024.03.13-08.25.01:594][ 73]LogCaptureSubsystem: nvenc added
[2024.03.13-08.25.01:594][ 73]LogCaptureSubsystem: Warning: Using software encoder
[2024.03.13-08.25.01:594][ 73]LogCaptureSubsystem: Creating Video Queue
[2024.03.13-08.25.01:595][ 73]LogCaptureSubsystem: Error: 삄♴荈᡻甀핥�㶀랞ã甀适诌䣖쮋胨ț䠀쎋ᇫ譌먃� Error: 

In LogErrorUE() function it print unicode. but I have no idea how can check the reason. because it called on TaskGraph

When u start recording u should manually stop recording or happened something strange.
For example, someone starts recording and then presses alt+f4 and recording will not stop by itself. In this case created video-file is empty. it is occupied and u cant delete it.

Hi, I add this plugin into my project and set the start capture funtion when the game starts. It will crash and the callstack is below.

LoginId:ee59dbdb47407b5f9a3a199aa4238aae
EpicAccountId:f226dda7fb214bd9b9c0bd4f67d8202e

Unhandled Exception: EXCEPTION_ACCESS_VIOLATION reading address 0x0000000000000088

avformat_59
avformat_59
avformat_59
UnrealEditor_CaptureSubsystem!UCaptureSubsystemDirector::Create_Video_Encoder() [E:\FProjects\UEProj\Study03\Plugins\UE_CaptureSubsystem\Source\CaptureSubsystem\Private\CaptureSubsystemDirector.cpp:531]
UnrealEditor_CaptureSubsystem!UCaptureSubsystemDirector::CreateEncodeThread() [E:\FProjects\UEProj\Study03\Plugins\UE_CaptureSubsystem\Source\CaptureSubsystem\Private\CaptureSubsystemDirector.cpp:326]
UnrealEditor_CaptureSubsystem!UCaptureSubsystemDirector::OnBackBufferReady_RenderThread() [E:\FProjects\UEProj\Study03\Plugins\UE_CaptureSubsystem\Source\CaptureSubsystem\Private\CaptureSubsystemDirector.cpp:205]
UnrealEditor_CaptureSubsystem!TBaseUObjectMethodDelegateInstance<0,UCaptureSubsystemDirector,void __cdecl(SWindow &,TRefCountPtr const &),FDefaultDelegateUserPolicy>::ExecuteIfSafe() [E:\DevTools\UE5\UE_5.2\Engine\Source\Runtime\Core\Public\Delegates\DelegateInstancesImpl.h:552]
UnrealEditor_SlateRHIRenderer
UnrealEditor_SlateRHIRenderer
UnrealEditor_SlateRHIRenderer
UnrealEditor_Core
UnrealEditor_Core
UnrealEditor_RenderCore
UnrealEditor_RenderCore
UnrealEditor_Core
UnrealEditor_Core
kernel32

Capturing images by increasing the FPS option speeds up audio playback in proportion to FPS.
Only 30 fps work correctly video and audio syncronizing.

Hello, after packaging successfully, the recorded video UMG is hidden, is there any way to make the recorded video UMG display in runtime mode

Hello，I use this code to capture game video. The game frame rate is greater than or equal to the video recording frame rate, and the recorded video effect is very good. If the game frame rate fluctuates and is lower than the frame rate of the recorded video, the recorded video may experience slow motion. Is there has a plan to fix this bug？