"autocrop" forces the data window to conform to the display window by
discarding data outside the display window and/or padding with black pixels to
grow the data window to fill the display window. But it only applies to output
file formats that don't support separate display and data windows (which means
it has no effect when outputting to .exr). Put another way, "autocrop" really
means "automatically do --croptofull if the file format doesn't support
separate display and data windows".
"autotrim" trims away parts of the data window until it gets to the minimal
rectangle that contains all non-black pixels of the image.
I'm pretty sure it's autotrim you want here.
There is a way to autotrim away the black parts in formats that support it,
oiiotool --autotrim foo.exr bar.exr --siappendall -o out.exr
or
oiiotool foo.exr bar.exr --siappendall -o:autotrim=1 out.exr
(In the first, --autotrim makes that the default for all outputs, in the
second, the modifier to -o makes it autotrim for just that one output in
particular -- same effect in this example, but remember you can have more than
one -o in a command.)
As it currently stands, though, the autotrim will trim all "parts" (what OIIO
calls "subimages") in the output to the union of the region of nonzero pixels
across all the subimages. Currently, it does not trim each part separately. I
don't know if that distinction is important to you or not.
> On Dec 10, 2021, at 2:37 PM, Jose Alejandro Enriquez
> <[email protected]> wrote:
>
> Hello everyone,
>
> I was wondering if there is a way to use oiiotool to auto crop images that
> will be merged using --siappendall. Some layers have less pixel information
> so, I would like to crop to their size, is this possible?
>
> I have tried the the -o:autocrop=1 flag before the output without success.
>
> Best,
> --
> Jose Alejandro Enriquez
> Pipeline TD, PIXOMONDO
> Skype Name: live:.cid.90318dda1ebc48cf
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--
Larry Gritz
[email protected]
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