Re: Testing with lossless codecs
Re: Testing with lossless codecs
- Subject: Re: Testing with lossless codecs
- From: Darrin Cardani <email@hidden>
- Date: Mon, 10 Aug 2009 10:08:35 -0700
On Aug 3, 2009, at 9:38 AM, Dan DiPaola wrote:
II have found that "NONE" does a fairly good job of holding a color
space. ... most of all no artifacts. If and when my gamma or
saturation shifts I do a compensation pass on the front end. I need
all the color gamut I can possibly get with ABSOLUTELY no artifacts.
We encode for Blu-ray, any artifacting will make itself known on a
60' screen after we compress the HD down to 18Mbs. If there is even
so much as a hint of color banding or posterization I will amplify
it by a factor of two or more depending on the motion and colors
used in the shot. I do not believe Animation is a truly and
completely lossless codec.
The Animation codec absolutely is a truly and completely lossless
codec when set to Best temporal and spatial quality. If you find that
not to be the case, it's a bug. You can do a simple test by
compressing some footage with it, opening up the compressed footage
and placing it over the original footage and setting the blend mode to
Difference. If there are any pixels which are not 0, then it's not
lossless. (And if that's the case and you're sure you've set it to
Best quality, then it's a bug.)
Darrin
--
Darrin Cardani
email@hidden
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