You're half way there -- this python script splits all the non-RGB channels out
into separate JPG files.
It's easy to convert your jpegs to an animated GIF from the command line:
oiiotool *.jpg -siappendall --attrib FramesPerSecond 1.0 -o anim.gif
Doing it from Python is possible (given a very recently posted fix), but
frankly is unnecessarily complicated compared to the above single command.
> On Jul 17, 2020, at 1:30 PM, Jerome Raim <[email protected]> wrote:
>
> Hello all,
> I'm writing a script to help operators inspect all available channels that
> aren't RGB in an EXR. I'd like to create a 1fps GIF that shows all non-RGB
> channels.
>
> I am able to extract each channel and save it as JPG, but not finding the
> proper syntax to save it as an animated GIF.
>
> What I have so far:
>
> import OpenImageIO as oiio
> from OpenImageIO import ImageInput, ImageOutput
> from OpenImageIO import ImageBuf, ImageSpec, ImageBufAlgo, ROI
>
> input_path = 'vfx.exr'
>
>
> img = oiio.ImageBuf(input_path)
>
> for ch in [c for c in spec.channelnames if not c in ['R', 'G', 'B']]:
> ch_img = ImageBufAlgo.channels(img, (ch,ch,ch), newchannelnames=("R",
> "G", "B"))
> ch_img = ImageBufAlgo.fit(ch_img, roi=ROI(0,640,0,480,0,1,0,3))
> ImageBufAlgo.render_text(ch_img, x=0, y=100, text=ch, textcolor=(1,1,1,1))
>
> ch_img.write("{}.jpg".format(ch) ##
>
>
> Thanks in advance for your help.
>
> Best,
> Jerome
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--
Larry Gritz
[email protected]
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