Hi, Mate!
In python and OIIO 1.8.x you could do something like this:
####
import OpenImageIO as oiio
sourcefile = 'your_prores.mov'
src_buf = oiio.ImageBuf(sourcefile)
for frame in range(src_buf.nsubimages):
src_buf.reset(sourcefile, subimage=frame)
out_buf = oiio.ImageBuf()
oiio.ImageBufAlgo.colorconvert(out_buf, 'INSPACE', 'OUTSPACE')
out_buf.write('/some/path/filename.{0:04d}.exr'.format(frame))
####
Just replace INSPACE and OUTSPACE with something useful.
I think the syntax has changed a bit in oiio2.x but you should be able to
port I guess.
On Tue, Apr 2, 2019 at 1:47 PM Mate Birkas <[email protected]> wrote:
> Dear OIIO Devs,
>
> since this is my first post here, I would like to thank you for this
> superb tool!
>
> I'm building a VFX pipeline and I need to convert ProRes 4444 files to exr
> sequences. FFmpeg does the job, but color management is not very well
> documented, OpenColorIO is not supported and I could not even get a
> intermediate TIF sequence that I can convert to EXR with a color output
> that I can control with consistently. So I tried to use oiiotool for the
> job, but when I run
>
> `oiiotool test.mov -sisplit -o:all=1 test.%d.exr`
>
> oiiotool hangs. It loads all the CPUs to 100% (mostly waiting for io) and
> starts to fill the RAM, rather slowly. My uneducated guess is that oiio
> uncompresses all the subimages to RAM before it writes them out to disk.
> Even if my assumption is right it is prohibitively slow, so slow in fact
> that I didn't even have the time yet to test my theory. (My 516 frames long
> 2K test file is running for 35 minutes now)
>
> My question is that is this the intended behavior (for now of course) or
> I'm doing something wrong? Could it be a problem with my build (oiio 2.0.7,
> gcc 8.2.1, ffmpeg 4.1.1, Arch Linux)? If oiiotool is not production ready
> in this sense, then maybe you have some information on integrating ffmpeg
> into an ocio pipeline, and you can point me to the right direction, which I
> would really appreciate.
>
> Tanks a lot,
> Mate Birkas
> _______________________________________________
> Oiio-dev mailing list
> [email protected]
> http://lists.openimageio.org/listinfo.cgi/oiio-dev-openimageio.org
>
--
-Daniel
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