Hello, I've been directed here from the bugzilla: https://bugs.gentoo.org/show_bug.cgi?id=410585 I will copy my bug report from there, so no need to click :)
Currently there are two different flags which pull the same library (media-libs/libvpx) for the same purpose. vpx : Enables vp8 codec support using libvpx, required to play some HTML5 videos webm: Use system media-libs/libvpx for HTML5 WebM video support. Generally webm is somewhat wider term than vp8 (see e.g. here: http://en.wikipedia.org/wiki/WebM), but in all ebuilds I have checked webm USE flag just pulls the vp8 implementation library - libvpx. I am not 100% sure, but to me it seems like webm and vpx USE flags should be unified. $ equery hasuse -p vpx * Searching for USE flag vpx ... [-P-] [ ] media-plugins/gst-plugins-meta-0.10-r6:0.10 [IP-] [ ] media-plugins/gst-plugins-meta-0.10-r7:0.10 [-P-] [ ] media-video/avidemux-2.5.6-r1:2 [-P-] [ ] media-video/ffmpeg-0.7.8:0 [-P-] [ ] media-video/ffmpeg-0.10:0 [IP-] [ ] media-video/ffmpeg-0.10.2:0 [-P-] [ -] media-video/ffmpeg-9999:0 [-P-] [ ] media-video/libav-0.6.5:0 [-P-] [ ] media-video/libav-0.7.4:0 [-P-] [ -] media-video/libav-0.7.9999:0 [-P-] [ ] media-video/libav-0.8:0 [-P-] [ ] media-video/libav-0.8.1:0 [-P-] [ -] media-video/libav-0.8.9999:0 [-P-] [ -] media-video/libav-9999:0 [-P-] [ ] media-video/mplayer-1.0_rc4_p20110322-r1:0 $ equery hasuse -p webm * Searching for USE flag webm ... [-P-] [ ] mail-client/thunderbird-8.0-r1:0 [-P-] [ ] mail-client/thunderbird-9.0:0 [-P-] [ ] mail-client/thunderbird-10.0:0 [-P-] [ ] mail-client/thunderbird-10.0.1:0 [-P-] [ ] mail-client/thunderbird-10.0.1-r1:0 [-P-] [ ] mail-client/thunderbird-10.0.3:0 [-P-] [ ] mail-client/thunderbird-11.0.1:0 [-P-] [ ] net-libs/xulrunner-2.0.1-r1:1.9 [-P-] [ ] www-client/firefox-8.0:0 [-P-] [ ] www-client/firefox-9.0:0 [-P-] [ ] www-client/firefox-10.0:0 [-P-] [ ] www-client/firefox-10.0.1:0 [-P-] [ ] www-client/firefox-10.0.1-r1:0 [-P-] [ ] www-client/firefox-10.0.3:0 [-P-] [ ] www-client/firefox-11.0-r1:0 [-P-] [M ] www-client/icecat-10.0-r1:0 [-P-] [M ] www-client/icecat-10.0-r2:0 [-P-] [ -] www-client/seamonkey-2.4.1-r1:0 [-P-] [ -] www-client/seamonkey-2.7.1:0 [-P-] [ ] www-client/seamonkey-2.7.1-r1:0 [-P-] [ ] www-client/seamonkey-2.8:0 [-P-] [ ] www-client/seamonkey-2.8-r1:0 best regards, Paweł Rumian
