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View Full Version : Downgrading CG to 4:1:1

Scott212
10-12-2005, 03:38 AM
Do you guys have any suggestions for degrading cg to better sit in a miniDV composite? No matter how great the render, a 4:4:4 cg render still doesn't look natural in a 4:1:1 scene. Application/plugin is not important, anything will do. I'm open to all suggestions.

Cheers :thumbsup:
JoshKirk
10-12-2005, 11:40 PM
I use a mosiac filter to give it that "compressed" feel. Give it a go and see if that helps? Many a time I have to keyframe the amount if the subject changes distance to the camera dramatically.
Scott212
10-13-2005, 12:26 AM
Thats a good suggestion, I'll give it a go.
Integrity
10-13-2005, 03:23 AM
How about exporting it to whatever format your using and then composite with that. That way your compositing with the DV format in the first place. Mixing the captured video (or whatever format your using) from DV with uncompressed CG will definitely be noticable like you said.
Scott212
10-13-2005, 07:03 PM
I had thought about that but I figured it would degrade the alpha channels too much, but I never actually tried it. If the cg is exported with a quicktime codec of DV/NTSC it will be sampled at 4:1:1 correct?
JoshKirk
10-14-2005, 04:00 AM
Use the alpha from the original file still but use the RGB of the new file.
NickJushchyshyn
10-14-2005, 02:22 PM
Just keep in mind that the 4:1:1 compression acts on color, but leaves luma at full res.
Also, the mosaic is horizontal only. Vertical resolution is not compressed by 4:1:1 DV
bartrobinson
10-18-2005, 09:28 PM
Pull the matte from the FG at 4:4:4.

Apply any necessary color corrections to match to the BG.

Then run the FG through a DV codec or out to the same camcorder you used to acquire the BG and back in again.

Apply the matte and comp.
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10-18-2005, 09:28 PM
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