Switcher for 24p

I recently had to do a 24p switching setup for comparing and wiping between the 1080p24 outputs from two Alexa cameras. For some VFX work. Here, 24p refers to 'true 24fps', not 23.976.
The rental company told me BM Atem switchers don't work for 24p, only 1080i50 and 1080i60. Is that correct?

Is there any BM switcher that work with 24p?

No BMD vision mixers support 24p

The videohub routers should work so long as you are OK with a hard cut, rather than fade or wipe.

Otherwise you'll need to look to another manufacturer, I'm not actually sure even who to suggest as 24p simply isn't used for live production.

One further thought is you could use a virtual vision mixer based on Decklink cards. I can't remember the name of any bits of software which work as virtual vision mixers but i know that they exist (wirecast might be one??) it's been discussed on www.atemuser.com before.

I don't understand, why a not supported framerate at input (!) makes this problems. As long, as the resolution is the same, input's frame buffer should solve the problem by buffering. In worst case, one frame will be shown twice or will be not shown.

Please explain to me in simple words

I don't understand, why a not supported framerate at input (!) makes this problems. As long, as the resolution is the same, input's frame buffer should solve the problem by buffering. In worst case, one frame will be shown twice or will be not shown.

Please explain to me in simple words

In simple words. It's not supported because it's not supported.

It's a bit like how we all just got screwed with the 60Hz vs 59.94Hz issue where from one firmware release to the next (3.1.x to 3.2) devices that used to work at 60Hz plugged in to the ATEM running in 59.94 mode now no longer work.

vIn simple words. It's not supported because it's not supported.

OK, a little more complex would work

I think, a solution for this issue may be simple, because the only thing to do is, to allow (support ) it. The resolution and the aspect ratio are existing, it only another timing, which must be handled by the frame buffers at input and the video out. Nothing ist to resize, or convert ! (And in older version, it worked....)

I think we might have missed some of the point. 24p typically is transmitted in 1080i60. SO guessing from the comment it worked, I am wondering if this is just another part of the 1080i60 vs 59.94 issue.

Just to confirm are you (Thomas Seewald) saying that this worked previously in the past version of the ATEM firmware? and you just set it to 1080i60?

Sharyn

I only say, that it should be no problem for programming, because all requirements are available. (Supported resolution - no up/downscale - only a question of timing). And the 60.00 vs 59.xx-issue wasn't one in Mixers 3.1x firmware (as I understood some posts here in the forum)