With the update gstreamer packages to 1.10.4 (that was due in RHEL 7.4
already), the gstreamer1-libav package has bumped the requirement to
ffmpeg 3.X. So we are currently in a in-between state.
There is also a need to a newer ffmpeg with vlc 3.x that I consider
upgrading EL7 to (current vlc 2.2.x version is unmaintained, even
debian stable updated from 2.2.x to 3.x because of that).
We might give an opportunity to update x264/x265 too and eventually
refresh some dependencies here.
My plans would be to update to either ffmpeg 3.3x or 3.4.x (the latest
from the 3.x branch). there is already a compat-ffmpeg28 package ready
to ease the transition.
There isn't a terribly high number of el7 packages that depends on
ffmpeg fortunately (or not).
And it's a shame because EL7 has way more users than any Fedora
releases together (according to epel stats (2)).
So I really would like some volunteer to take a deeper look at what we
can support here.
$ repoquery --whatrequires libavcodec.so.56\* --source