Gentoo Packages

Warning: USE flag 'libav' is used in ebuilds/metadata but is not defined in profiles/use.desc
Warning: USE flag 'libav' used by dev-php/ffmpeg-php but has no description in metadata.xml, use.local.desc or use.desc
Warning: USE flag 'libav' used by media-video/vlc but has no description in metadata.xml, use.local.desc or use.desc

Package	Local Description (use.local.desc)	Metadata Description (metadata.xml)
dev-php/ffmpeg-php	-	-
media-video/vlc	-	-

USE Flag: libav