I'm using OpenImageIO 1.6.13 but using a slightly modified version with our own build scripts. Let me try a stock build with a more recent version.
On Tue, Oct 4, 2016 at 1:37 PM, Larry Gritz <[email protected]> wrote: > Weird. Here is the the last email I sent, right here on the list. But my > previous two replies have not shown up in my inbox. > > > On Oct 4, 2016, at 1:27 PM, Larry Gritz <[email protected]> wrote: > > The mail server from openimageio.org seems at the moment to be, if not > broken, then at least significantly delaying things in the queue. > > So resending with Eric directly CC'd so he doesn't think I'm ignoring. > > I'm having trouble reproducing. Which version of OIIO are you using? > > > > > On Mon, Oct 3, 2016 at 11:40 AM, Eric Tabellion < > [email protected]> wrote: > >> Hi, >> >> I'm trying to convert grayscale (half) float linear .exr images into >> 8-bit sRGB render-ready .tx files, while using dithering in the process >> with --dither. >> >> When the input image is 3-channel color data the conversion works fine. >> However when the image is single channel, --dither seems to choke up a >> garbled image. Converting the image from 3-channel down to single channel >> at the same time as using --dither won't work either. >> >> For example either of these two commands below will produce garbled >> images using RGBA inputs: >> >> oiiotool input.exr --ch "R" --dither --colorconvert linear sRGB -d uint8 >> -o output.tif >> >> maketx input.exr --nchannels 1 --dither --colorconvert linear sRGB -d >> uint8 --oiio --compression zip -o output.tx >> >> I'm trying to get this all done in one maketx pass, but so far the only >> way I got this to work is doing this: >> >> oiiotool input.exr --dither --colorconvert linear sRGB -d uint8 -o tmp.tif >> maketx tmp.tif --nchannels 1 --oiio --compression zip -o output.tx >> >> This doesn't work though if the input image is already single-channel. >> Anyone else can reproduce this ? Could this be a --dither bug when >> dithering single channel images? >> >> Thanks! >> Eric >> >> -- >> --------------------------------------------------------------- >> Eric Tabellion [email protected] >> R&D Staff (650)-562-9146 >> PDI/Dreamworks >> >> >> _______________________________________________ >> Oiio-dev mailing list >> [email protected] >> http://lists.openimageio.org/listinfo.cgi/oiio-dev-openimageio.org >> >> > > > -- > Larry Gritz > [email protected] > _______________________________________________ > Oiio-dev mailing list > [email protected] > http://lists.openimageio.org/listinfo.cgi/oiio-dev-openimageio.org > > > -- > Larry Gritz > [email protected] > > > -- --------------------------------------------------------------- Eric Tabellion [email protected] R&D Staff (650)-562-9146 PDI/Dreamworks
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