Forums > Jitter

chromakey/lumakey slab?

February 2, 2009 | 6:27 pm

Is there a chromakey slab out there? I didn’t see one included in the distro, but I could have missed something. Also curious if there is a slab that emulates jit.mxform2d? Any other cool slabs out there Id love to get as well, but mainly interested in a nice keyer. Ive used the luma keying shader that a.benson made for the shader tutorial, maybe there is a way to modify this to take another input and turn it into a slab so I can composite 2 things together?

Im putting together a nice slab based effects patch to share, its looking really cool, I put together the best of the included jitter slabs, and Im trying to make it work somewhat like the AUVI in the respect that each one has feedback ammount and blend modes, next I am adding an easy way to integrate it with audio files or patches and LFOs/step sequencers, and then it should be done pretty soon.

February 2, 2009 | 6:30 pm

I should also mention right now its running at 24fps nice and smooth with 6 complex effects at full SD video resolution. I love slabs!

February 2, 2009 | 6:30 pm

Max5/Cycling ’74/jitter-shaders/composite/co.chromakey.jxs
Max5/Cycling ’74/jitter-shaders/composite/co.lumakey.jxs

February 2, 2009 | 6:32 pm

damn that was fast hahaha, I just posted that like the second you replied. Thanks! not sure how I missed that, but sometimes I get so wrapped up in complex things I overlook the obvious.

February 2, 2009 | 7:49 pm

Does anyone out there have any cool slab libraries? Ive got vade’s stuff, and ive seen a couple other things here and there on the list, but I didn’t know if anyone else had made any shader/slab libraries. Anything would be cool really, id just love to have more effects for my slab chain. Ive got most of the best ones that were included with jitter. I think this thing Im making will be a great tool for others as well, it runs smooth with lots of complex effects and feedback chains, and its capable of some pretty diverse video processing so far.

I also made a typo earlier, its running at 35fps right now with all the effects and feedback chains running about 18 slabs total so far, at full SD, which is pretty awesome, in my experience built in jitter objects I can get about 4-5 effects going at 320×240 before I start to get choppy below 15fps. I wish they would recreate all the nice built in jitter objects with slabs! I also wish someone would recreate even some of the AUVI with slabs!! That would be so bad ass! those already ran pretty smooth, I cant imagine how good they would be on the gpu! and with all that extra cpu power left over for audio we could do sick audio and visual all on one laptop!! WOOT! Hell I would do it if I understood shader programming better. Im working on it but damn even though the code is usually pretty small and looks so easy, I just dont understand the math and structure of it yet. Hopefully someday…

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