OBS 26.1 results in black screen with Decklink mini-recorder

[Bert Hofsink]

Hi. After someone in our church AV team ran the suggested upgrade for OBS from 26.0.2 to 26.1, we ended up with the dreaded black screen when trying to use the video from the build-in Decklink mini recorder card (BlackMagic). We use this combination for church services streaming to Utube.
As the BM recording software did show the video, it was clear that the problem was in the OBS software. After several hours of trouble-shooting, I restored version 26.0.2 and was back in business... I warned the team to not touch that upgrade anymore!
(I entered OBS into the Graphics Settings as a classical app with Power saving settings as suggested somewhere)

Is anybody familiar with this and has the 1-million dollar answer? Is it indeed a bug or am I missing a setting (I tried everything I could adjust)?
Have a great 2021, from the Netherlands,
Bert

 

[qhobbes]

There's a known issue with certain formats in BlackMagic devices in 26.1 . https://obsproject.com/forum/threads/blackmagic-intensity-pro-4k.135619/ states they're working on it. Mine worked with default settings. If that doesn't work, you can download 26.0.2 from https://github.com/obsproject/obs-studio/releases/tag/26.0.2 and just install over 26.1

 

[Bert Hofsink]

Thanks, that confirms me that we should stick to 26.0.2 for the time being...

 

[genericOBSuser69]

I can confirm issues getting input from Blackmagic Decklink Mini Recorder when using OBS 26.1.1
Just updated to this last week and was unable to get any sort of input detected

Issue was resolved by reverting to OBS 26.0.2
The installer can be found by following this official OBS link: https://github.com/obsproject/obs-studio/releases/tag/26.0.2
Install files are at the bottom of the page.

Similar threads:
https://obsproject.com/forum/thread...lack-screen-and-no-audio-after-update.135872/
version 26.1.1 breaks Blackmagic ultrastudio 4k mini #4189
https://obsproject.com/forum/thread...ck-screen-with-decklink-mini-recorder.136426/

My input was 1080i50 from a BlackMagic ATEM Television Studio HD, routed through a Blackmagic Smart Videohub 20x20

 

[qhobbes]

Try OBS Studio 27 Release Candidate 2, this worked for me.

Release OBS Studio 27.0 Release Candidate 2 · obsproject/obs-studio

Release Candidate 2 Fixes Fixed a crash on startup with the Missing Sources dialog Fixed Chroma Key not keying correctly Fixed RTX denoiser not initializing correctly Undo/Redo now has a maximum n...

github.com