Monitor / Display Capture causes massive FPS loss

DeadHamster

New Member
I recently replaced my HDD in my PC and had to reinstall Windows 7 and update OBS. Upon installing this newer version, I'm noticing a considerable drop in performance that seems to be tied to my Display Capture.

My stream consists of 3D modelling and Programming, all of which need my Monitor to be captured directly. I use NVENC encoder on a GTX 750 Ti, output at 720p 30FPS. CPU is an overclocked ancient FX-4100 running at 4.3ghz. With this hardware and encoders I've been able to stream without much issue in the past using previous versions of OBS. After some debugging and trying to render cameras and videos in lower resolutions I was able to tie the performance drop exclusively to using Display Capture. Turning it on increases the time to render a frame by roughly 45ms.

Log File

There's nothing I see showing in the log at the time, but at 3:04:08 I turn display capture on for 4 seconds and the FPS drops immediately. I see this everywhere but don't know what it means

03:04:28.785: warning: Found EOI before any SOF, ignoring
03:04:28.785: fatal: No JPEG data found in image
03:04:28.785: Error decoding video


Is there anything I can look into doing or should I downgrade to OBS 26 and go from there? I'm really unfamiliar with bitrate settings and anything to do with Video Encoding and I'm hoping there's some settings I have that are way out of line. I'd hate to have to reconstruct all my Sources and Scenes, again, after having just finished doing this (and not quite being completed). It's quite a bit of work and the older version also means losing the Twitch integration and needing to use a Stream Key going forward. Any advice would be appreciated, thank you for the help.




EDIT - Well I solved this immediately. I read through the error log again, looking for anything that might stand out, and saw the following line
03:03:56.715: Aero is Enabled


I still had Aero from my reinstall of Windows. Turning off Aero and using a Standard theme fixed everything; my capture has resumed to what I experienced in previous versions with virtually no slowdown. Sorry for cluttering up the forum, maybe this will help someone in the future
 
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