Hello, You can look at this : https://github.com/romainaugier/OpenViewer/tree/1.0
I started writing a media viewer a few months ago (that uses OpenImageIO), and I've made a few command line utilities, one of them is a exr converter (with applied ocio conversion). You can look at the code and try to build it, it uses conan to manage dependencies. I hope this helps too. By the way, if anyone is interested by this project, do not hesitate to let me know ! Cheers, *Romain Augier* *Software Developer * https://romainaugier.com/ cont...@romainaugier.com +33601020297 On Mon, Jan 23, 2023 at 9:48 PM Donat Van Bellinghen <do...@nozon.com> wrote: > Hi, > > I would advice you to look into > https://github.com/jedypod/generate-dailies > > This script uses OIIO and ffmpeg to generate video files. The very elegant > thing about this approach is that the frames read and converted by OIIO are > 'served' to ffmpeg, without the need to first store jpegs for example on > disk before encoding the video. I used this on our pipeline to manage the > review mp4's of all our work. > > Hope this helps > (And thanks so much Larry for all the dev on OpenImageIO !) > > Regards > *Donat Van Bellinghen | Lead Compositor* > T > +32 2 701 93 71 [image: LinkedIn] <http://www.linkedin.com/company/nozon> > A 26 Rue Deschampheleerstraat, 1081 Brussels [image: Vimeo] > <http://vimeo.com/nozon3dvfx> > > > [image: Facebook] <https://fr-fr.facebook.com/pages/Nozon-3DVfx> > [image: www.nozon.com] <http://www.nozon.com/> > > > > On Wed, Jan 18, 2023 at 7:35 PM Larry Gritz <l...@larrygritz.com> wrote: > >> OIIO is not really trying to be a video oriented API and doesn't >> understand video files. That's just not what it was designed for. There are >> some edge cases, for example, it can read from many video files, but to >> OIIO they just look like a container with many separate still images. But >> it glosses over things like frame rates, audio, the ins and outs of all the >> parameters you need for certain video codecs, etc., and doesn't have a >> provision for writing video files. >> >> ffmpeg is exactly the opposite -- it's the king of reading and writing >> video formats, but actually its grasp of OpenEXR is pretty suspect, and it >> doesn't have any provision for an OpenColorIO-based color management >> pipeline. >> >> So the short answer is that what most studios do is use oiiotool to >> batch-convert their exr -> png (to pick a format that ffmpeg is good at), >> including resizing and the OCIO transformations to the intended final >> output color space, then feed those images to ffmpeg for the actual >> encoding into a video file of the desired format. >> >> Please note this repo https://richardssam.github.io/ffmpeg-tests >> in which Sam Richards from Disney Imagineering has tried to investigate >> best practices for this task. That whole site is full of information you'll >> want to read. >> >> >> >> On Jan 18, 2023, at 1:37 AM, Mike Battcock < >> mike.battc...@time-based-arts.com> wrote: >> >> Hello, >> >> I'm not very familiar with OIIO but it seems very powerful. Does it just >> convert from one image format to another or can it convert an image >> sequence to a video? >> >> I would like to convert an AcesCG exr sequence to an h264 video, is that >> possible with OIIO? I've not been able to find a solution with ffmpeg that >> manages the aces colourspace and I'm hoping to find a solution that can do >> the conversion at once without first converting the images to a different >> colourspace... >> >> Cheers, >> Mike >> _______________________________________________ >> Oiio-dev mailing list >> Oiio-dev@lists.openimageio.org >> http://lists.openimageio.org/listinfo.cgi/oiio-dev-openimageio.org >> >> >> -- >> Larry Gritz >> l...@larrygritz.com >> >> >> >> >> >> _______________________________________________ >> Oiio-dev mailing list >> Oiio-dev@lists.openimageio.org >> http://lists.openimageio.org/listinfo.cgi/oiio-dev-openimageio.org >> > _______________________________________________ > Oiio-dev mailing list > Oiio-dev@lists.openimageio.org > http://lists.openimageio.org/listinfo.cgi/oiio-dev-openimageio.org >
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