One Camera not displaying every other program start

[Pagingsmitty]

Hi, I've been lurking and learning here for the last few months. I've run OBS successfully for the last 8 weeks or so with an SDI camera and HDMI to SDI.

New Windows 10 (Dell XPS 8930 i7 9700 32 gig RAM) Blackmagic Design Decklink Duo 2 card configured for all inputs.

This week I installed two PTZoptics cameras, both SDI. 1 a Gen2 PTZ 30x zoom, the other a 20x block zoom camera. Both are connected SDI to the Decklink and power is PoE.

The PTZ camera is set to output at 1080p30. That matches the block camera. OBS common frame rate is 30. When you select the Blackmagic input as a source, I changed mode from Auto to 1080p30 (hoping that would help the situation.)

When I load OBS, I can see the PTZ display every other time. Every other time is black. I tried a few other combinations, but that's the only constant in any of it. I sat and opened and closed 10x in a row, and the PTZ displayed every other time. The block displayed every time.

I've searched PTZoptics and BMD groups and haven't come across this either, i'm wondering if anyone else has any ideas? Next idea i have is to uninstall OBS and reinstall.

If a log file is helpful i'll go generate a couple tonight.

 

[Pagingsmitty]

I was running these cameras on inputs 2 & 3. I had a different camera on input 1 earlier and hadn't taken it off when i installed these. After moving PTZ to input 1, it's loading every time. I don't have to understand it, i just have to be happy it's working for now

 

[NellBishop]

Thanks a bunch, that solved my problem on Linux too.

Mine started doing that when I disconnected one of the cams and then reconnected it.
Persisted over several restarts.

And, just as you said, I had a scene referencing a non-existent camera.
Changed that to the right cam and all is well again.