The EOTF Ramp Samples Show A Large Difference Between The Last Two Patches. Most Likely Due Sampling The End Slate Instead Of The Last EOTF Ramp.

[harrisonwu0220]

Hi, I tried to calibrate our LED wall with Assimilate's Live FX, they have integrated OpenVPCal into the application.
BUT, I've tried time after times, it kept showing the error below:

The EOTF Ramp Samples Show A Large Difference Between The Last Two Patches.
Most Likely Due Sampling The End Slate Instead Of The Last EOTF Ramp.
This Is Likely Due To A Genlock, Frame Rate Mismatch, Sync Issue, Or Inconsistent Playback Rates.Ensure You Playback & Capture Setup Is Correct

[31548] Failed to execute script 'main' due to unhandled exception!

And I've checked many times, BMD Decklink 8K Pro G2 and BMD URSA Mini 4.6K G2 were locked in 1080p30 with AJA GEN10.The playback from Live FX was set to 30fps.

Is there anything else that should be awared of?

[DavidGravy]

It looks like your LED wall and camera are not in sync and you are blending frames. Just because you’re in genlock doesn’t mean you’re in sync. You’ll need to run a strobe test to confirm.

With your tech / camera stack I don’t think you’ll be able to set offset anywhere but potentially the led processor. On Brompton / Megapixel this is fairly straight forward. What processor are you using?

Feel free to check my profile for some sync patterns you could use.