This un-breaks libqtav by upgrading it to the current upstream HEAD.
Previously, Qtav was broken by the Qt 5.12 -> 5.14 migration (#84232).
See commit 819bb63d5c
This also un-pins ffmpeg_3; libqtav works fine with current ffmpeg.
Digikam is the only derivation in nixpkgs that has referenced libqtav, thus
upgrading to a pre-release revision poses minimal risk.
After making `ffmpeg` point to the latest `ffmpeg_4`, all packages that
used `ffmpeg` without requiring a specific version now use ffmpeg_3
explicitly so they shouldn't change.
This was actually already mentioned in the comment above version:
Awaiting upcoming `v1.12.0` release. `v1.11.0` is not supporting
cmake which is the the reason behind taking an unstable git rev.
So version 1.12.0 has been released in the meantime and it's also needed
by the latest version of digiKam, which is the only package in nixpkgs
that depends on libqtav.
As we're going to bump digiKam, I think bumping this is safe as in the
worst case we can only make things broken which are already broken
(digiKam currently doesn't build).
The fixes for the CMakeLists.txt are now also no longer needed, so we
can safely drop them as well.
Signed-off-by: aszlig <aszlig@redmoonstudios.org>
Cc: @jraygauthier
