Here is the github thread which had some recent discussion before the repo was taken down. Rockchip said something like it would be too much work to fix the licenses for all the new chips they are creating.
https://web.archive.org/web/20251103193914/https://github.co...
The archive isn't very good for the thread. Is that what they said though? From the comments I see they said "we're working on it, but we're busy with XYZ" and then months passed.
Archive won't load the remaining 3 items for me.
Yes it's not loading on the archive but I was following the thread closely, it was said recently within the last few months which prompted further discussion and this action by ffmpeg.
100% my assumptions but:
They were never really working on it, they thought it would just go away. Maybe some junior/senior dev took a shot at it, gave a project plan and it went nowhere.