Question / Help Ingame all fine OBS some Lags

[D3R0]

Hi there!
I've got a problem which I can't fix on my own I guess. I'm interested in streaming some Fortnite gameplay.

When I start a test stream on Twitch the game is still running smooth at 60 FPS. But when I keep an eye on OBS there are some lags in the preview.

OBS Logfile: https://pastebin.com/BU226ziR
testmy.net Upload: 8.6 Mbps

CPU: Intel Core i7 3770K
RAM: 16GB
GPU: NVIDIA GeForce GTX 970

Maybe I got completely wrong coding settings at all in OBS.
I hope you can help me with my problem and sorry for my bad english skills...

Greetings

 

[Boildown]

14:34:59.533: [DShow Device: 'Facecam_unten'] settings updated:
14:34:59.533: video device: Logitech Webcam C925e
14:34:59.533: video path: \\?\usb#vid_046d&pid_085b&mi_00#7&fe30a69&0&0000#{65e8773d-8f56-11d0-a3b9-00a0c9223196}\global
14:34:59.533: resolution: 1920x1080
14:34:59.533: fps: 30.00 (interval: 333333)
14:34:59.533: format: MJPEG
14:34:59.534: DShow: HDevice::ConnectPins: failed to connect pins (0x80040207):
14:34:59.999: ---------------------------------
14:35:00.000: [DShow Device: 'Facecam_oben'] settings updated:
14:35:00.000: video device: Logitech HD Pro Webcam C920
14:35:00.000: video path: \\?\usb#vid_046d&pid_082d&mi_00#7&14b4a5ef&0&0000#{65e8773d-8f56-11d0-a3b9-00a0c9223196}\{bbefb6c7-2fc4-4139-bb8b-a58bba724083}
14:35:00.000: resolution: 1920x1080
14:35:00.000: fps: 30.00 (interval: 333333)
14:35:00.000: format: MJPEG

You have two webcams, and both are running at 1080p mode? That won't work unless you take a lot of precautions. First put the web cams on different USB root hubs. Second, don't run them at 1080p (unless you're cam girl or something, there's no reason to do that). Set them to 540p or 480p.

14:45:20.183: [NVENC encoder: 'recording_h264'] settings:
14:45:20.183: rate_control: CBR
14:45:20.183: bitrate: 3500
14:45:20.183: cqp: 0
14:45:20.183: keyint: 120
14:45:20.183: preset: default
14:45:20.183: profile: main
14:45:20.183: level: 4.2
14:45:20.183: width: 1920
14:45:20.183: height: 1080
14:45:20.183: 2-pass: true
14:45:20.183: b-frames: 2
14:45:20.183: GPU: 0

You need to downscale to 720p instead of streaming at 1080p. Also change the preset to HQ (High Quality) instead of default and set the level to Auto (not strictly needed but a good idea in general).

 

[D3R0]

I have set the Webcam now to 864x480 and disabled the 2nd one for now.
But I only use 2 webcams when I am streaming some League of Legends and I'm waiting in the Queue.

You need to downscale to 720p instead of streaming at 1080p. Also change the preset to HQ (High Quality) instead of default and set the level to Auto (not strictly needed but a good idea in general).

I have set the downscale in Settings -> Video -> Output (scaling) Resolution: 1280x720 @60FPS
Also got the option to set the scaling at the encoder settings not sure what's better.

But all in all it's better now but still got some short lags in OBS.

 

[jds4578]

D3R0: you might also need to force fortnite to 30/60fps, whatever fps your OBS is set to, using nvidia inspector, as you have an nvidia gfx card installed. Thats probably why OBS is lagging the game.

I would also set fortnite & OBS to administrator mode.

 

[D3R0]

D3R0: you might also need to force fortnite to 30/60fps, whatever fps your OBS is set to, using nvidia inspector, as you have an nvidia gfx card installed. Thats probably why OBS is lagging the game.

I would also set fortnite & OBS to administrator mode.

Fortnite is already running with a 60FPS cap. And I've set the admin setting for Fortnite and OBS now.
So is it possible to disable this nvidia inspector or change some settings?