NDI+OBS Output Lag

tractortay23

New Member
My NDI feeds from ProPresenter into OBS are great; my NDI feeds from my PTZOptics cameras into OBS are great; my NDI OUTPUT from OBS is terrible—probably a 2 seconds delay.

- Running OBS on a Late-2014 27” iMac 3.5 GHz 4-core i7 32GB RAM 1TB Fusion 2GB Radeon Graphics
- Magewell NDI-HDMI decoder, HDMI connected directly to a TV.

Here is a comparison that isolates the issue in OBS—I play a video in ProPresenter that displays full-screen in OBS:

1) I decoded ProPresenter signal...almost no delay
2) I decoded OBS signal...almost 2 seconds delay

My OBS preview and program windows show almost no delay either.

Where is this delay coming from? How can I get eliminate it? Is there some switch in OBS or in NDI Access Control that I need to flip?

Thank you!

P.S. Can grab a log file if it's helpful in diagnosing this problem.
 
I think the problem is that the NDI project on the OBS forums has been pretty much abandoned while ProPresenter has continued development with the newest SDK's. So we'll just have to continue to wait and be patient.
 
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