[Cellar] ffv1 version 4 status

[Dave Rice <[e-mail]>]

Hi everyone,

I just posted an update to the document for FFV1 version 4. Currently this document is at version 22. The latest version is at https://datatracker.ietf.org/doc/draft-ietf-cellar-ffv1-v4/. There has not been much for changes or discussions on this document so I wanted to summarize open issues to nudge some dialogue and contribution.

Much of the open work for FFV1 version 4 is seen at https://github.com/FFmpeg/FFV1/pulls and https://github.com/FFmpeg/FFV1/issues. Here's a summary:

-- Embedded metadata

In this pull request, https://github.com/FFmpeg/FFV1/pull/104, Jerome proposes a structure to store a table of key/value pairs that relates to a metadata registry. This permits storage of defined values such as color primaries or the use of broadcast range.

-- Multispectral Support

In this PR, https://github.com/FFmpeg/FFV1/pull/138/files, Michael drafts a structure for discussion that permits the storage of multispectral data in ffv1.

-- Bayer support

This PR is related to using FFV1 with data from sensors that generate pixel data in bayer formats (such as DSLR cameras and film scanners). Jerome drafted a proposal at https://github.com/FFmpeg/FFV1/pull/100.

-- Updates to generating CRCs

Michael proposed an update at https://github.com/FFmpeg/FFV1/pull/181/. 

-- Support for floating point pixel formats

Drafted by Jerome at https://github.com/FFmpeg/FFV1/pull/197.

I'd love to encourage some discussion on how to resolve any of these open pull requests or how to prioritize them.

Kind Regards,
Dave Rice