MacOS Lagging Video capture

[Jhorn]

Hi all, apologies if this has been answered but I can’t find anything.

I am having some issues with my set up and can’t work out what is causing it.

my set up:

- Mac Mini 2018 3Ghz i5 6 Core CPU (64GB RAM) with eGPU
- Microscope with blackmagic decklink mini PCIE HDMI capture card in an Echo Express TBT 3 enclosure
- Microscope camera 4K 60FPS

my issue is that the tracking on OBS and recording is really laggy and slow. It’s not smooth like some of the videos I see online.

I have my recording settings as x264 and video settings as 60FPS and 1080P.

Does anyone know if this is just a hdmi capture issue? Or is it the Mac’s hardware itself obviously having the poor integrated graphics?

thanks
Jamie

 

[nottooloud]

Are you using the eGPU, and what card is in it? Please post a log.

 

[Jhorn]

I have the eGPU plugged in but there is no option for it on OBS. The card is an AMD Radeon RX 5700 XT. I believe this is an Apple Mac compatibility issue? Have uploaded the log file.

 

[nottooloud]

You're downscaling your output to 720. Set it to 1080.

It is at least seeing the Radeon and loading Open GL on it. I would try whatever different encoding options you have. I'm not sure how OBS interacts with en eGPU, haven't used one.

 

[Jhorn]

I tried both 720 and 1080 but no luck. I have Apple VT software and hardware + a third option of x264.
Which would be best? I have tried all so guess I am stuck