Video assist 7" problems

I have 3 video assist.
Previously the inputs and outputs worked at all resolution except 1080i60, (not 59.94) which would record and display on screen, but not output a signal out of HDMI output.
(Yes. I know 1080i60 is not proper video frame rate, but it is listed as being supported)
(Scenario is laptop output to video assist. Video assist output to projector, so I can record PowerPoint presentation)

So...I updated the firmware to current firmware, now the output works at 1080i60.
But it seems when one problem is fixed another is created.
Now all 3 only display black screen when input 1080i50.
All other resolution works well.

They detect the signal as 1080i50, but only display black.
When I plug the same signal via SDI into an atem 1me 4k, or original atem TVS, or atomos samurai, the signal is fine. But video assist shows only black.

Same problem on all 3 units.
Even if I loop the output from atomos samurai, which is working, video assist shows black.

Oh, and cable is Belden 1505a with 1505abhd1 Belden connectors. Doesn't matter if cable is 2m or 80m.

Is the pc outputting interlaced? I'd expect it to be Progressive ?

Shoot a ticket to BMD support. That would be the fastest way to get this sorted and bug fixed if there is a bug in the software..

Good morning. Did you ever find a fix to this problem? I will make a new post with my similar problem, copied below, but I figured I would check with you, too. Thanks


I have two BMD 4k Video Assist units with up to date firmware. When I send video from the REC OUT SDI port on C300 MII, it shows no picture, and resolution indicator shows 1080. If I send that same signal into a Shogun Inferno, then out of Inferno into the BMD 4k Video Assist, then it recognizes the resolution as UHD and shows the picture.

The Shogun also indicates UHD and shows picture with or without the BMD hanging on the out port.

Same symptoms with different combinations of cables, cameras and shogun/BMD units.

Check if switching incoming signal from level b to level a (or level a to level b) makes a difference.

Check if switching incoming signal from level b to level a (or level a to level b) makes a difference.

Thanks for the reply. I am not sure what you mean by level b or level a. Can you elaborate?