... in order to make it possible for us to update openh264 without
having to recompile ffmpeg against the new version every time. As
openh264 is distributed by Cisco and ffmpeg is in Fedora, it's difficult
to coordinate lock step updates. Drop the version check to make this
easier.
https://patchwork.ffmpeg.org/project/ffmpeg/list/?series=10211
This also rebases downstream ffmpeg-dlopen-openh264.patch on top of
the new patch.