Nothing should depend on the known vulnerable multimedia/ffmpeg0. Either
patch it to support modern ffmpeg or remove it. This project appears to be
unmaintained upstream for 14 years now so the second option would probably be
for the best.
I will write a patch to build it without ffmpeg and/or use the new API.
A commit references this bug:
Date: Mon Jun 3 09:19:01 UTC 2019
New revision: 503365
- drop dependency on multimedia/ffmpeg0