Comment # 26 on bug 1095545 from Andreas Stieger

# ffmpeg/Chromium
%if 0%{?suse_version} <= 1500
# libvpx-1_6 is also an option
Prefer: libvpx-devel
%endif
%if 0%{?suse_version} <= 1500
# 42.3 and 15.0 use ffmpeg3
Prefer: ffmpeg-3-libavcodec-devel ffmpeg-3-libavdevice-devel
ffmpeg-3-libavfilter-devel ffmpeg-3-libavformat-devel
ffmpeg-3-libavresample-devel ffmpeg-3-libavutil-devel
ffmpeg-3-libpostproc-devel ffmpeg-3-libswresample-devel
ffmpeg-3-libswscale-devel ffmpeg-3-private-devel
%endif
%if 0%{?suse_version} > 1500
Prefer: ffmpeg-4-libavcodec-devel ffmpeg-4-libavdevice-devel
ffmpeg-4-libavfilter-devel ffmpeg-4-libavformat-devel
ffmpeg-4-libavresample-devel ffmpeg-4-libavutil-devel
ffmpeg-4-libpostproc-devel ffmpeg-4-libswresample-devel
ffmpeg-4-libswscale-devel ffmpeg-4-private-devel -ffmpeg-3-libavcodec-devel
-ffmpeg-3-libavdevice-devel -ffmpeg-3-libavfilter-devel
-ffmpeg-3-libavformat-devel -ffmpeg-3-libavresample-devel
-ffmpeg-3-libavutil-devel -ffmpeg-3-libpostproc-devel
-ffmpeg-3-libswresample-devel -ffmpeg-3-libswscale-devel
-ffmpeg-3-private-devel -ffmpeg-2-libavcodec-devel -ffmpeg-2-libavdevice-devel
-ffmpeg-2-libavfilter-devel -ffmpeg-2-libavformat-devel
-ffmpeg-2-libavresample-devel -ffmpeg-2-libavutil-devel
-ffmpeg-2-libpostproc-devel -ffmpeg-2-libswresample-devel
-ffmpeg-2-libswscale-devel -ffmpeg-2-private-devel
%endif

Prefer: -ffmpeg2-devel
Substitute: ffmpeg2-devel ffmpeg-2-libavcodec-devel
Prefer: -ffmpeg3-devel
Substitute: ffmpeg3-devel ffmpeg-3-libavcodec-devel
Prefer: -libavcodec-devel -libavdevice-devel -libavfilter-devel
-libavformat-devel -libavresample-devel -libavutil-devel -libpostproc-devel
-libswresample-devel -libswscale-devel -ffmpeg-private-devel