Attendance:

Others:

• Li Ji

Discussion:

• Cary: Uniform Type Identifier issue from TAC meeting. Anything to do here? 

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  • Larry: all looks good, mostly just wanted to know if “open” should be in the type for exr, but that’s a no.

• OpenSSF Badge:

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  • Internationalization:

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    • Larry: all VFX facilities speak english. The benefits of internationalizing OpenEXR are minimal.

    • Peter: English appears primarily in error messages.  Could switch that to an ID system.

    • Cary: We can’t add much value beyond the user’s ability to run error messages through Google Translate.

    • John: Can probably get by just explaining that. 

  • Security policy

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    • John: here’s an example: 

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      • https://github.com/coreinfrastructure/best-practices-badge/blob/main/docs/assurance-case.m

• Nick:

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  • Still working on Zips core bugs

  • We have extensive tests for OpenEXR, but not for OpenEXRCore, things not tested for.

  • We have pride in the stability of the OpenEXR library, would like to get core to that point.

  • Channel order: If you write to RGBA, it writes them out alphabetized but not the data.

  • Took me 3 weeks to learn core, documentation is hand-wavy, the tests are not a good reference to read a file.

  • Doesn't say  if I'm reading a tiled file and the image isn’t aligned with the window.

  • Core can’t read all the test images

  • I’ve only experienced crashes in experiments with the API

• Peter:

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  • Kimball wrote the original core parser.

  • CheckFile doesn’t validate if it reads it correctly, only that it doesn’t crash 

• Larry:

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  • Last version of OIIO switched to core, blender folks encountered bug.

  • OIIO only reads with core, doesn’t write

• Larry:

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  • PR Fix issue with decompressing fp32 dwa files #1591

• Peter:

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  • OpenEXR test suite should read and write every file in the openexr-images test suite.

  • Iterate through all compression types, writes, reads, validates. Should be expanded to core.

  • Will the files be byte-identical? Not sure.

• Li:

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  • Zip compression interprets the data as bytes, not half or float.

  • Peter: same with deep. It doesn’t compress very well.

  • Peter: DWA compression is better than run zip and hope for the best.

• Joseph:

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  • Can’t compress in camera

  • Red has a patent on compressed raw.

  • Peter: would have to demosaic first, then write.

  • That’s why HD is so effective

• Peter: what is missing from openexr that puts people off?

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  • Can cameras output exr?

  • Has to run faster than realtime.

  • Joseph: DITs will send you flowers