GEGL-0.4.50 is out. Current media-libs/gegl-0.4.48[ffmpeg] fails to build against ffmpeg-7. New release fixes that.
The media-libs/gegl-0.4.50 is presented in PR ( https://github.com/gentoo/gentoo/pull/39237 ) for media-gfx/gimp-3.0.0_rc1 etc. New version still failed tests with ffmpeg-6 and expected to fail with ffmpeg-7. I will recheck for ffmpeg-7 and will rebase that PR to mention this issue in appropriate commit.
Fixed in https://gitweb.gentoo.org/repo/gentoo.git/commit/media-libs/gegl?id=e06c692cc6d904e93fb5365cdfd51829e41fe916
Any hope of getting this stabilized soon?