Question / Help VERY laggy but no FPS drop when OBS is capturing

[LHM]

I stream Assetto Corsa on a regular basis and never had any issues until this evening. The game (not the stream) lags like crazy for a few seconds then is ok, then it lags again but there is no drop in FPS. This is happening when OBS is running. If I close OBS down the game runs smooth as silk. Can anyone help please?

 

[C-Dude]

https://obsproject.com/forum/threads/please-post-a-log-with-your-issue-heres-how.23074/

 

[LHM]

11:39:47.407: CPU Name: Intel(R) Core(TM) i7-4790K CPU @ 4.00GHz
11:39:47.407: CPU Speed: 4000MHz
11:39:47.407: Physical Cores: 4, Logical Cores: 8
11:39:47.407: Physical Memory: 16244MB Total, 13996MB Free
11:39:47.407: Windows Version: 10.0 Build 14393 (revision: 693; 64-bit)
11:39:47.407: Running as administrator: false
11:39:47.408: Aero is Enabled (Aero is always on for windows 8 and above)
11:39:47.408: Portable mode: false
11:39:47.444: OBS 17.0.2 (64bit, windows)
11:39:47.444: ---------------------------------
11:39:47.444: ---------------------------------
11:39:47.444: audio settings reset:
11:39:47.444: samples per sec: 44100
11:39:47.444: speakers: 2
11:39:47.445: ---------------------------------
11:39:47.445: Initializing D3D11..
11:39:47.445: Available Video Adapters:
11:39:47.447: Adapter 1: NVIDIA GeForce GTX 980 Ti
11:39:47.447: Dedicated VRAM: 2104164352
11:39:47.447: Shared VRAM: 4222009344
11:39:47.447: output 1: pos={0, 0}, size={3840, 2160}, attached=true
11:39:47.447: Adapter 2: Intel(R) HD Graphics 4600
11:39:47.447: Dedicated VRAM: 117964800
11:39:47.447: Shared VRAM: 2147483648
11:39:47.449: Loading up D3D11 on adapter NVIDIA GeForce GTX 980 Ti (0)
11:39:48.044: D3D11 loaded sucessfully, feature level used: 45056
11:39:48.560: ---------------------------------
11:39:48.561: video settings reset:
11:39:48.561: base resolution: 3840x2160
11:39:48.561: output resolution: 1280x720
11:39:48.561: downscale filter: Bicubic
11:39:48.561: fps: 60000/1001
11:39:48.561: format: NV12
11:39:48.563: ---------------------------------
11:39:48.570: Required module function 'obs_module_load' in module '../../obs-plugins/64bit/chrome_elf.dll' not found, loading of module failed
11:39:48.571: [CoreAudio encoder]: CoreAudio AAC encoder not installed on the system or couldn't be loaded
11:39:48.576: [AMF Encoder] Unable to load 'amfrt64.dll', error code 126.
11:39:48.630: Required module function 'obs_module_load' in module '../../obs-plugins/64bit/libcef.dll' not found, loading of module failed
11:39:48.631: Required module function 'obs_module_load' in module '../../obs-plugins/64bit/libEGL.dll' not found, loading of module failed
11:39:48.634: Required module function 'obs_module_load' in module '../../obs-plugins/64bit/libGLESv2.dll' not found, loading of module failed
11:39:48.637: Failed to load 'en-US' text for module: 'obs-browser.dll'
11:39:48.637: [browser_source: 'Version: 1.28.0']
11:39:48.653: NVENC supported
11:39:48.699: Couldn't find VLC installation, VLC video source disabled
11:39:48.707: No blackmagic support
11:39:48.995: ---------------------------------
11:39:48.995: Loaded Modules:
11:39:48.995: win-wasapi.dll
11:39:48.995: win-mf.dll
11:39:48.995: win-dshow.dll
11:39:48.995: win-decklink.dll
11:39:48.995: win-capture.dll
11:39:48.995: vlc-video.dll
11:39:48.995: text-freetype2.dll
11:39:48.995: rtmp-services.dll
11:39:48.995: obs-x264.dll
11:39:48.995: obs-transitions.dll
11:39:48.995: obs-text.dll
11:39:48.995: obs-qsv11.dll
11:39:48.995: obs-outputs.dll
11:39:48.995: obs-filters.dll
11:39:48.995: obs-ffmpeg.dll
11:39:48.995: obs-browser.dll
11:39:48.995: image-source.dll
11:39:48.995: frontend-tools.dll
11:39:48.995: enc-amf.dll
11:39:48.995: coreaudio-encoder.dll
11:39:48.995: ==== Startup complete ===============================================
11:39:49.005: All scene data cleared
11:39:49.005: ------------------------------------------------
11:39:49.060: WASAPI: Device 'Speakers (2- Logitech G933 Gaming Headset)' initialized
11:39:49.075: WASAPI: Device 'Microphone (2- Logitech G933 Gaming Headset)' initialized
11:39:49.094: adding 46 milliseconds of audio buffering, total audio buffering is now 46 milliseconds
11:39:52.630: Switched to scene 'Scene'
11:39:52.632: ------------------------------------------------
11:39:52.632: Loaded scenes:
11:39:52.632: - scene 'Scene':
11:39:52.632: - source: 'Game Capture' (game_capture)
11:39:52.632: - source: 'Fat Kid Alerts' (browser_source)
11:39:52.632: - source: 'Followers' (browser_source)
11:39:52.632: - source: 'LHM logo' (image_source)
11:39:52.632: - filter: 'Chroma Key' (chroma_key_filter)
11:39:52.632: - source: 'Webcam' (dshow_input)
11:39:52.632: ------------------------------------------------
11:39:52.691: ---------------------------------
11:39:52.691: [DShow Device: 'Webcam'] settings updated:
11:39:52.691: video device: Logitech HD Pro Webcam C920
11:39:52.691: video path: \\?\usb#vid_046d&pid_082d&mi_00#6&395925c3&3&0000#{65e8773d-8f56-11d0-a3b9-00a0c9223196}\{bbefb6c7-2fc4-4139-bb8b-a58bba724083}
11:39:52.691: resolution: 1280x720
11:39:52.691: fps: 30.00 (interval: 333333)
11:39:52.691: format: I420
11:39:52.999: Update check: last known remote version is 17.0.2

 

[C-Dude]

You didn't do it correctly never paste a log into this is just is too hard to deal with like this.

Also you need to include a recording in your log, record/stream for a few minutes then stop and without closing obs click upload current log file. Then paste the URL it gives you into the reply box below.

 

[BornDownUnder]

It is a few simple steps to upload a logfile to greatly assist others in providing you help with troubleshooting. I can immediately see one potential issue though, your game resolution set at 3840x2160 might be too much for your video card to handle whilst recording, causing latency in display output.

Try dropping your game resolution down some a bit.

 

[LHM]

Thank you for the replies so far, it is appreciated. I have never had an issue streaming with my GTX 980 Ti at 3840x2160. But, I think I may have found the issue, and it seems to be related to GSync on my monitor with Assetto Corsa. When OBS is running with Gsync enabled for full screen mode only Assetto Corsa lags like crazy, when I switch is to Gsync enabled for windowed and full screen mode it is smooth as silk. Any ideas why?

 

[BornDownUnder]

Sorry I cannot assist further, as I don't have a G-Sync monitor or a nVidia card.
Maybe drivers/driver settings? It might be the way G-Sync itself interacts with the video card.