Attendance:

  • Cary Phillips
  • Christina Tempelaar-Lietz
  • John Mertic
  • Joseph Goldstone
  • Kimball Thurston
  • Larry Gritz
  • Nick Porcino
  • Peter Hillman
  • Rod Bogart

Others:

  • Li Ji

Discussion:

  • Cary: Uniform Type Identifier issue from TAC meeting. Anything to do here? 
    • 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:
    • Internationalization:
      • 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
  • Nick:
    • 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:
    • Kimball wrote the original core parser.
    • CheckFile doesn’t validate if it reads it correctly, only that it doesn’t crash 
  • Larry:
    • Last version of OIIO switched to core, blender folks encountered bug.
    • OIIO only reads with core, doesn’t write
  • Larry:
    • PR Fix issue with decompressing fp32 dwa files #1591
  • Peter:
    • 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:
    • 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:
    • 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?
    • Can cameras output exr?
    • Has to run faster than realtime.
    • Joseph: DITs will send you flowers
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