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phrygn  
#1 Posted : Thursday, May 25, 2023 6:35:11 AM(UTC)
phrygn

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Hi everyone,

I'm trying to set up a layered input with 5 video channels (vmix call/NDI sources). My goal is to have 4 videos in an equal "Brady Bunch" 4up, with the 5th video on top of the 4up in the center as a circle, like so:

230525 OL circle layout chroma.png (55kb) downloaded 3 time(s).

The main layer of the input is a transparent color. Layer 10 (top layer) is the above PNG with black bar borders, and a green circle in the middle that I'm hoping to fill with another video source via chroma.

Outside of VMIX, I achieved this with an upstream key on an ATEM, choosing the green color as the chroma color, and the fill as a video input (sort of a "reverse green screen").

Is there a way to achieve this in VMIX? I have tried playing with the chroma setting on the PNG border linked above, and I can remove the green, but can't fill the green area with another source.

Thanks in advanced for any ideas!

-phrygn
paco3346  
#2 Posted : Thursday, May 25, 2023 7:57:17 AM(UTC)
paco3346

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Create a white circle PNG and import it.

Use that PNG as the alpha key for your video source.

Put the alpha keyed video as a layer on top of your PNG frame.
thanks 1 user thanked paco3346 for this useful post.
phrygn on 5/25/2023(UTC)
phrygn  
#3 Posted : Thursday, May 25, 2023 8:30:24 AM(UTC)
phrygn

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Thank you so much Paco! This is working successfully, however I need to zoom the video input out in order to frame it properly within the circle. When I change the zoom level of the video (virtual input), it also changes the size of the PNG circle. Any ideas on how I could implement this with a cropped/zoomed video, and not alter the size of the white circle?

Again, thanks so much for your helpful insight!
paco3346  
#4 Posted : Thursday, May 25, 2023 10:52:51 PM(UTC)
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You can change the zoom level of your PNG as well. There are other easier ways to do it that eat up more inputs but I usually just keep resizing the two until I have what I want
thanks 1 user thanked paco3346 for this useful post.
phrygn on 5/26/2023(UTC)
doggy  
#5 Posted : Thursday, May 25, 2023 11:08:17 PM(UTC)
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to have the ability to move, resize the video independatly within the green circle use a basic virtual set with the circle being a UVmap
thanks 1 user thanked doggy for this useful post.
phrygn on 5/26/2023(UTC)
phrygn  
#6 Posted : Tuesday, June 6, 2023 4:59:00 AM(UTC)
phrygn

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Thank you so much doggy, UV maps are exactly what I was looking for.

And thanks again to everyone who chimed in!
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