CasparCG Chroma Key

General
1

I have a question concerning the use of Chroma Key in CasparCG.

My workflow right now is that I’m sending a video signal out of a laptop (hdmi > SDI) into my Caspar CG server and loading the DecklinkCard on Layer 4.

I now want to key out the background of this input (also cropping etc, but that is working just fine).

If I use “MIXER 1-4 CHROMA Blue 0 1 0” it works just fine.
However I’d like to use a different keying color since for a new situation I’ll have blue in the foreground.
I know I can use the same command with green, but that doesn’t fit either.

I’ve therefore tried using this syntax: “MIXER 1-1 CHROMA 1 120 0.1 0 0 0.1 0.1 0.7 0” (from the wiki)
However this seems to not key out any color at all. I’ve tried around with all paramaters, but I don’t seem to get it to work.

Is there something special I need to pay attention to?

Any help would be greatly appreciated :slight_smile:

Tobi

2

Does anyone have an idea?
Is this syntax just not working anymore?

3

I just tested with server 2.2 dated 22_06_2018 with following command
MIXER 1-2 CHROMA GREEN 0.65 0.67 100

And it worked.

Green_chroma
Green_chroma1023×610 63.2 KB

4

This syntax does only work in CasparCG version 2.1 and above, for 2.0.7 use the old syntax.

5

Thanks didi… That’s exactly the mistake I made.