--- /usr/portage/media-video/ffmpeg2theora/ffmpeg2theora-0.29-r2.ebuild	2015-02-02 01:02:10.000000000 +0200
+++ /usr/portage/media-video/ffmpeg2theora/ffmpeg2theora-0.29-r2.ebuild	2015-03-13 14:45:34.000000000 +0200
@@ -30,6 +30,10 @@ src_prepare() {
 		"${FILESDIR}"/${P}-swr.patch \
 		"${FILESDIR}"/${P}-ffmpeg2.patch \
 		"${FILESDIR}"/${P}-underlinking.patch
+
+	for FILE in avinfo.c ffmpeg2theora.c ; do
+		sed -i -e "s:CODEC_ID_:AV_&:g" "${S}/src/${FILE}" || die
+	done
 }
 
 src_configure() {