Dropped frames from encoding lag but CPU and GPU not close to being maxed out

[GCTuba]

So I just built a new system running Windows 11 (9800X3D, RTX 5090, 64GB 6000MHz RAM, WD SN850x) and I'm getting horrible dropped frames no matter what my settings are. My last build (i7-6700K, RTX 3080, 16GB 2133MHz RAM, Samsung 850 Evo, Windows 10) didn't have any issues recording at 4K/60fps. Even after turning off HAGS, setting OBS to high performance, changing the rate control, and dropping down my recording settings to 1080p/60fps, I'm still getting constant dropped frames in every recording. The CPU and GPU are barely being worked at these settings and yet it's still happening. I'm not sure what to do at this point so any help is appreciated. I've attached my latest log file.

 

[prgmitchell]

So I just built a new system running Windows 11 (9800X3D, RTX 5090, 64GB 6000MHz RAM, WD SN850x) and I'm getting horrible dropped frames no matter what my settings are. My last build (i7-6700K, RTX 3080, 16GB 2133MHz RAM, Samsung 850 Evo, Windows 10) didn't have any issues recording at 4K/60fps. Even after turning off HAGS, setting OBS to high performance, changing the rate control, and dropping down my recording settings to 1080p/60fps, I'm still getting constant dropped frames in every recording. The CPU and GPU are barely being worked at these settings and yet it's still happening. I'm not sure what to do at this point so any help is appreciated. I've attached my latest log file.

This log you sent shows no frames being lost from rendering/encoding lag.

 

[GCTuba]

This log you sent shows no frames being lost from rendering/encoding lag.

So it turns out VLC can't display 8K video and MPC and Potplayer play it with constant stuttering. Recording at 4K and playing through VLC seems to work (although still stuttering with the other video players). So in that instance there isn't any encoding lag. Here's another log file that shows encoding lag at 8K. I know the resolution is high but keep in mind my CPU and GPU still had plenty of overhead here so the system isn't being overloaded. Not sure what else would be causing that though.

https://obsproject.com/logs/ZhN8A0zBieO3oU1p

 

[prgmitchell]

So it turns out VLC can't display 8K video and MPC and Potplayer play it with constant stuttering. Recording at 4K and playing through VLC seems to work (although still stuttering with the other video players). So in that instance there isn't any encoding lag. Here's another log file that shows encoding lag at 8K. I know the resolution is high but keep in mind my CPU and GPU still had plenty of overhead here so the system isn't being overloaded. Not sure what else would be causing that though.

https://obsproject.com/logs/ZhN8A0zBieO3oU1p

I think you are misunderstanding what type of "overhead" is required to record at this resolution. Try using the P1 preset instead of P5 and test again.

 

[rockbottom]

Video Encoding at 8K60 with Split-Frame Encoding and NVIDIA Ada Lovelace Architecture | NVIDIA Technical Blog

Capturing video footage and playing games at 8K resolution with 60 frames per second (FPS) is now possible, thanks to advances in camera and display technologies. Major leading multimedia companies…

developer.nvidia.com

 

[GCTuba]

Video Encoding at 8K60 with Split-Frame Encoding and NVIDIA Ada Lovelace Architecture | NVIDIA Technical Blog

Capturing video footage and playing games at 8K resolution with 60 frames per second (FPS) is now possible, thanks to advances in camera and display technologies. Major leading multimedia companies…

developer.nvidia.com

This looks interesting, I'll have to try it out when I get home. I was able to record at 8K using P1 but not at P2 (even though, again, my CPU and GPU are not close to maxed out). I still can't find a video player that will play back the footage outside of Davinci Resolve, and uploading the video to YouTube downscales it to 4K. I'll need to keep researching.

 

[prgmitchell]

This looks interesting, I'll have to try it out when I get home. I was able to record at 8K using P1 but not at P2 (even though, again, my CPU and GPU are not close to maxed out). I still can't find a video player that will play back the footage outside of Davinci Resolve, and uploading the video to YouTube downscales it to 4K. I'll need to keep researching.

If P1 works there is nothing left to do, there is zero benefit to using anything higher than P1 when recording with CQP.

 

[koala]

my CPU and GPU are not close to maxed out

The Nvenc encoder is a dedicated circuit on the Nvidia GPU. It will not contribute to the GPU load displayed in the process overview of Windows task manager. You will see its load if you switch to the 2nd tab and inspect the corresponding GPU. It's the "Video encode" section. Encoding in 8k is like encoding 4 4k screens or 16 full hd (1080p) screens, an extremely taxing operation.