[PNG] Meeting minutes - Apr 14th, 2025

Attached is a PDF of the meeting minutes from Apr 14th, 2025.

Executive summary:

   - Revisited parallel decoding
      - Strong support for working with what we already have. This means
      the pigz/mtpng method which requires no spec change.
      - For a change to the spec (the new chunk method), we want to gather
      as many ideas and as much test data as we can before picking something to
      standardize. This is a call to action for implementers: Please
show timings
      and file size comparisons for a wide range of test images.
   - Gain maps / gain curves / T.35 / rWTm
      - Almost certainly going into Fourth Edition.
      - Google, Apple, NBC Universal, and the new SMPTE spec will clarify
      in the next few weeks. We'll wait until then for specifics. But
we can see
      the industry need & push.
   - Generic image-like data
      - Probably not going into Fourth Edition. It is significant
      complexity and might not provide sufficient benefit.
      - This might be revisited depending on gain maps.
   - A Call for Consensus will go out to agree on Third Edition
   transitioning to Proposed Recommendation.


Our next meeting is Apr 28th, 2025.
See you then!