well, as long as you stay inside AVID i guess DNxHD is solid and
convenient, but i found that as soon as i need to get it to
another app i hit similar problems...
the other thing that bugs me about DNxHD is its fixed bitrate
(which wastes a lot of space in some cases) and that it only
works on standard video sizes.
just repeated the greenscreen test with different footage (5K
epic greenscreen).. resized to HD and rendered to both prores
and dnxhd, then pulled a key with keylight on those files. sure
enough the same DNxHD block artifacts reappeared.
++ chris
ps: did some more digging and the whole thing is more crooked
then expected. when decoding prores422 files in nuke, it shows
much more chroma blocking then if decoding in AE or shake. DNxHD
files look smoother in nuke (but not in AE or shake), but have
other weird artifacts in all three apps... prores444 files are flawless.
so it seems that the prores422 decoding in nuke 6.3 is messed up
(encoding works fine, the "gamma shift", which is more a color
space shift, also happens upon decoding, but not on encoding).
if anybody wants to do a test in nuke7, or just wants to have a
look, here are some of the test files (the still is frame 7):
https://www.dropbox.com/s/a69z22t56hwvgi2/dnxhd-vs-prores.zip
On 3/30/13 at 7:02 PM, [email protected] (Chris Noellert) wrote:
I did in fact mean DNxHD where in the few shows I've used it,
have had excellent results. Granted I've never done side by
side and our editorial facilities are all Avid. But the
signals just "felt" cleaner which I know is not a quantitative
measurement or quality.
Sounds like I should test a bit. Thanks for your insight.
Best,
Chris
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