I ran into the same thing - I had rendered out a 16bit prores 422-HQ file and wanted to change the audio so rather than re-render the whole thing I tried rendering out the file with the new audio back out to prores same settings - I brought it back in and it looked different (like you say slight color shift - could be gamma) also this is on a Mac so no PC/Mac issues here - I ended up rendering the file with the new audio - I wish there were an easier way (there probably is) to just change the audio portion with out re-rendering the whole thing.
tt
From: "Mr. Eric D. Kirk" <kirkproductions@gmail.com>
To: "After Effects Mail List" <AE-List@media-motion.tv>
Sent: Tuesday, March 19, 2013 8:00:09 AM
Subject: Re: [AE] Windows to ProRes
I guess it's neither here nor there at this point but I must not be making myself clear. I am checking a ProRes against a ProRes and there is a difference. Appreciate all the feedback though.
Eric
On Tue, Mar 19, 2013 at 10:51 AM, Benny Christensen
<bennychristensen@me.com> wrote:
It's because the gamma in the Quicktime codec is different than the Windows AVI or whatever.
No I haven't read about the other one.
Producers Playhouse
Oklahoma City