One more. When you don't set the compression at all, the compression attr does not get set, so I'm not even sure if this is a "legal" dwa compressed file?
Shouldn't we default to 45 if nothing is set? On Thu, Sep 22, 2016 at 7:03 PM, Deke Kincaid <dekekinc...@gmail.com> wrote: > One other follow up and also related to the PR. With a multipart EXR > image, how do you set the compression on all parts? > > It is only setting it on part 0, none of the others are getting > compressed. Can we have the --compression dwaa:45 in the above PR also > work on every single part, not just the first one? Same with > --attrib dwaCompressionLevel 45 > it only goes to part 0. > > > > > On Thu, Sep 22, 2016 at 2:15 PM, Larry Gritz <l...@imageworks.com> wrote: > >> OK, my stab at this is here: https://github.com/OpenI >> mageIO/oiio/pull/1493 >> >> Please follow up comments on the approach on that PR, if you don't mind. >> >> It would be great for somebody to pull that patch on their end and give >> it a try (works for me, but would be good to have somebody else confirm it >> meets their expectations). >> >> >> >> On Thu, Sep 22, 2016 at 1:35 AM, Mike Wong | ax.gmail <artix...@gmail.com >> > wrote: >> >>> #2 +1 >>> >>> On Thu, Sep 22, 2016 at 12:36 AM, Larry Gritz <l...@imageworks.com> wrote: >>> >>> >>>> 1. As Kevin points out, we can use something akin to Karl's mapping >>>> (I'll find a cubic curve that maps these smoothly?) of quality's 0-100 >>>> scale into settings for DWA compression quality. I don't know if that will >>>> give you a "smooth" response either visually or in terms of file size. If >>>> somebody wants to do a little research and try to map out a more >>>> perceptually or size-wise linear response, please volunteer. >>>> >>>> 2. Another approach is to skip --quality, and just allow the >>>> compression setting to be built into the compression name! How does this >>>> look: --compression dwaa:45 or --compression dwaa:200. The idea is that >>>> anything starting with "dwaa" would turn on dwaa compression, and any >>>> optional trailing numbers would set the dwaaCompressionQuality. >>>> >>>> Opinions? >>>> >>>> >>>> >>> _______________________________________________ >>> Oiio-dev mailing list >>> Oiio-dev@lists.openimageio.org >>> http://lists.openimageio.org/listinfo.cgi/oiio-dev-openimageio.org >>> >>> >> >> >> -- >> Larry Gritz >> l...@imageworks.com >> >> _______________________________________________ >> Oiio-dev mailing list >> Oiio-dev@lists.openimageio.org >> http://lists.openimageio.org/listinfo.cgi/oiio-dev-openimageio.org >> >> >
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