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Enable 4:4:4 chroma filtering
I’m just beginning post on my first 5D project. I tested the E1 plugin versus Compressor for transcoding and it looks like Compressor’s output is slightly better quality. Namely, the E1 output is brighter and thus you can see more noise in the low light shots.
I am wondering about the “Enable 4:4:4 chroma filtering” option that is on by default when selecting the ProRes 422 preset in Compressor. What does that do? Should I leave that on or not?
I did see this thread:
https://forums.creativecow.net/thread/8/1016606#1016606…but I couldn’t verify it either on the Cow or the web.
Really, I’d love to understand what it does and why I should or should not use it.
Thanks in advance for your help,
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Christian H. Clark
City Limit Films
http://www.citylimitfilms.com -
3 Replies
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Hi Christian,
I wrote that long ago.
Please, have a look to this other threat because have been, I think, some changes:
https://forums.creativecow.net/readpost/8/1102715
Rafael -
Hey Rafael,
I saw your later post as well. I was really just looking for someone to verify it. I scoured the net and you were the only person I could find that attempted to explain it.
Basically, it seems like it’s just for downsampling so it wouldn’t be applicable for 5D/7D footage (as I assume they are nowhere near 4:4:4).
I tested a short clip (from the 5D) with and without it and it resulted in the same file size and same quality. I saw someone saying that if you take it off, you will get faster transcodes, but I have not tested that myself.
If anyone else has anything to add, let us know.
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Christian H. Clark
City Limit Films
http://www.citylimitfilms.com -
You are right, this shouldn’t affects to any other footage but 444.
I guess that checking this option, some chroma dithering will be applied before down-sampling.
All a guess; no info at all.
rafael
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