since I'm the one bringing all this headache ..
I'm totally happy with defining PixelAspectRatio as 0.5 when converting
with oiiotool. expecting it to show in the RV/Photoshot as aspectRatio 2.
On 01/30/2015 04:58 PM, Larry Gritz wrote:
On Jan 30, 2015, at 4:38 PM, Nathan Rusch<[email protected]> wrote:
It seems absurd, but kind of looks like its going to come down to whether you would
rather OIIO be technically correct (as we understand it), but annoy people and prompt
them to submit erroneous bug reports by creating images that look wrong in all the
applications they are viewed in, or have it be "wrong" for the sole purpose of
keeping people happy. Tough call indeed...
Head exploding...
Is it worth getting in touch with the maintainers of libjpeg to see if they
would stand by the comment in their source as it relates to the JFIF spec? Or
maybe just asking The Foundry and Tweak about performing an about-face?
I'm happy to contact all three. But if they change, there will be a versionitis
problem between old and new versions of those packages. And in any case,
PhotoShop is still backwards as well, and my intuition is that my chances of
getting them to change, or to care at all, is much less than with Nuke and rv,
where at least I know people who would humor me by listening to me make a case
for it.
Sigh. I'll do some experiments to see if there's any way around this. At the very
least, I want to restrict the wrongness to be completely contained in the JPEG
read/write, and not infect the rest of OIIO (including the app side), where
aspect> 1 should certainly mean wide pixels.
Another consideration: In 6 years, we have not had a single comment about our JPEG I/O
not supporting aspect ratio or the resolution fields until this week, so perhaps the
number of people who will be annoyed by our doing it "right" may be extremely
limited, and a better solution is to make sure those few people know the weird set of
hoops to jump through to make the images right in Nuke and rv (e.g., if you want aspect
2.0, you should ask oiiotool for 0.5).
-- lg
--
Larry Gritz
[email protected]
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--
Ran Sariel
CTO / Pipeline supervisor
The Embassy VFX Inc.
177 West 7th Ave, 4th Floor
Vancouver, BC
Phone: (604) 696-6862 ext. 244
[email protected]
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