[virtual/ffmpeg] new virtual, supporting true multilib for both libav and ffmpeg

This is used by our emul-linux-x86-medialibs

virtual/ffmpeg/ffmpeg-0.10.8.ebuild

@@ -0,0 +1,24 @@
+# Copyright 1999-2013 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+# $Header: $
+
+EAPI=5
+
+inherit multilib-build
+
+DESCRIPTION="Virtual package for FFmpeg implementation"
+HOMEPAGE=""
+SRC_URI=""
+
+LICENSE=""
+SLOT="0"
+KEYWORDS="~alpha ~amd64 ~arm ~hppa ~ia64 ~mips ~ppc ~ppc64 ~sparc ~x86 ~amd64-fbsd ~x86-fbsd ~amd64-linux ~x86-linux ~x64-macos ~x86-solaris"
+IUSE="X +encode gsm jpeg2k mp3 sdl speex theora threads truetype vaapi vdpau x264"
+
+RDEPEND="
+	|| (
+		>=media-video/ffmpeg-0.10.8:0[X?,encode?,gsm?,jpeg2k?,mp3?,sdl?,speex?,theora?,threads?,truetype?,vaapi?,vdpau?,x264?,${MULTILIB_USEDEP}]
+		>=media-video/libav-0.8.9-r1[X?,encode?,gsm?,jpeg2k?,mp3?,sdl?,speex?,theora?,threads?,truetype?,vaapi?,vdpau?,x264?,${MULTILIB_USEDEP}]
+	)
+"
+DEPEND=""

virtual/ffmpeg/metadata.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE pkgmetadata SYSTEM "http://www.gentoo.org/dtd/metadata.dtd">
+<pkgmetadata>
+<herd>video</herd>
+<maintainer>
+	<email>media-video@gentoo.org</email>
+</maintainer>
+<use>
+	<flag name="opus">Use the external opus library for encoding and decoding.</flag>
+	<flag name="vaapi">Enables VAAPI (Video Acceleration API) for hardware decoding</flag>
+</use>
+</pkgmetadata>