There is something fishy with our files that is tripping this bug. If I
paint an image in gimp, save it out, convert to an RGB .exr and run it
through the first command, it works just fine.
Here is what I can say about one of our files that causes the issue:
iinfo -v input.exr
input.exr : 4096 x 4096, 4 channel, half openexr
channel list: R, G, B, A
tile size: 256 x 256
oiio:ColorSpace: "Linear"
compression: "zip"
PixelAspectRatio: 1
screenWindowCenter: 0 0
screenWindowWidth: 1
exrheader input.exr
file input.exr:
file format version: 2, flags 0x200
channels (type chlist):
A, 16-bit floating-point, sampling 1 1
B, 16-bit floating-point, sampling 1 1
G, 16-bit floating-point, sampling 1 1
R, 16-bit floating-point, sampling 1 1
compression (type compression): zip, multi-scanline blocks
dataWindow (type box2i): (0 0) - (4095 4095)
displayWindow (type box2i): (0 0) - (4095 4095)
lineOrder (type lineOrder): increasing y
pixelAspectRatio (type float): 1
screenWindowCenter (type v2f): (0 0)
screenWindowWidth (type float): 1
tiles (type tiledesc):
single level
tile size 256 by 256 pixels
type (type string): "tiledimage"
On Tue, Oct 4, 2016 at 3:57 PM, Eric Tabellion <
[email protected]> wrote:
> # This fails (repeat of my first email)
> oiiotool input.exr --ch "R" --dither --colorconvert linear sRGB -d uint8
> -o output.tif
>
> # This fails too (removing --colorconvert):
> oiiotool input.exr --ch "R" --dither -d uint8 -o output.tif
>
> # This works!!! (removed -d uint8). But then my colorspace is off...
> oiiotool input.exr --ch "R" --dither --colorconvert linear sRGB -o
> output.tif
>
>
> On Tue, Oct 4, 2016 at 3:47 PM, Larry Gritz <[email protected]> wrote:
>
>> If you don't do the --colorcorrect, but you do everything else, do you
>> still get something garbled?
>>
>>
>> On Tue, Oct 4, 2016 at 3:42 PM, Eric Tabellion <
>> [email protected]> wrote:
>>
>>> Feel free to ignore this request entirely on the maketx side. I realize
>>> it's a version of maketx I modified weeks ago, adding a "--dither"
>>> command-line option (a seemingly trivial addition when looking at the
>>> oiiotool code).
>>>
>>> The request for oiiotool holds though. I was able to repro the issue
>>> with a fresh build of the freshly pulled master branch and Release-1.7.7
>>> tag.
>>>
>>> On Tue, Oct 4, 2016 at 2:41 PM, Eric Tabellion <
>>> [email protected]> wrote:
>>>
>>>> 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
>>>>
>>>>
>>>
>>>
>>> --
>>> ---------------------------------------------------------------
>>> 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
>>
>>
>
>
> --
> ---------------------------------------------------------------
> Eric Tabellion [email protected]
> R&D Staff (650)-562-9146
> PDI/Dreamworks
>
>
--
---------------------------------------------------------------
Eric Tabellion [email protected]
R&D Staff (650)-562-9146
PDI/Dreamworks
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