--- /usr/portage/media-video/ffmpeg/ffmpeg-9999.ebuild	2016-09-30 12:20:42.034388420 +0200
+++ ffmpeg-9999.ebuild	2016-09-30 12:09:48.984920242 +0200
@@ -97,7 +97,7 @@
 )
 
 IUSE="
-	alsa doc +encode jack oss pic static-libs test v4l
+	alsa cuda doc +encode jack libnpp oss pic static-libs test v4l
 	${FFMPEG_FLAG_MAP[@]%:*}
 	${FFMPEG_ENCODER_FLAG_MAP[@]%:*}
 "
@@ -162,13 +162,13 @@
 	cdio? ( >=dev-libs/libcdio-paranoia-0.90_p1-r1[${MULTILIB_USEDEP}] )
 	celt? ( >=media-libs/celt-0.11.1-r1[${MULTILIB_USEDEP}] )
 	chromaprint? ( >=media-libs/chromaprint-1.2-r1[${MULTILIB_USEDEP}] )
+	cuda? ( >=x11-drivers/nvidia-drivers-367.35 >=dev-util/nvidia-cuda-toolkit-7.5 )
 	ebur128? ( >=media-libs/libebur128-1.1.0[${MULTILIB_USEDEP}] )
 	encode? (
 		amrenc? ( >=media-libs/vo-amrwbenc-0.1.2-r1[${MULTILIB_USEDEP}] )
 		faac? ( >=media-libs/faac-1.28-r3[${MULTILIB_USEDEP}] )
 		kvazaar? ( media-libs/kvazaar[${MULTILIB_USEDEP}] )
 		mp3? ( >=media-sound/lame-3.99.5-r1[${MULTILIB_USEDEP}] )
-		nvenc? ( media-video/nvidia_video_sdk )
 		openh264? ( >=media-libs/openh264-1.4.0-r1[${MULTILIB_USEDEP}] )
 		snappy? ( >=app-arch/snappy-1.1.2-r1[${MULTILIB_USEDEP}] )
 		theora? (
@@ -274,6 +274,8 @@
 	)
 "
 REQUIRED_USE="
+	cuda? ( abi_x86_64 )
+	libnpp? ( cuda )
 	libv4l? ( v4l )
 	fftools_cws2fws? ( zlib )
 	test? ( encode )
@@ -282,6 +284,7 @@
 RESTRICT="
 	encode? ( faac? ( bindist ) )
 	gpl? ( openssl? ( bindist ) fdk? ( bindist ) )
+	cuda? ( bindist )
 "
 
 S=${WORKDIR}/${P/_/-}
@@ -299,6 +302,8 @@
 
 multilib_src_configure() {
 	local myconf=( ${EXTRA_FFMPEG_CONF} )
+	local extra_cflags=()
+	local extra_ldflags=()
 
 	local ffuse=( "${FFMPEG_FLAG_MAP[@]}" )
 	use openssl && use gpl && myconf+=( --enable-nonfree )
@@ -327,9 +332,10 @@
 	use xcb || ffuse+=( X:x11grab )
 
 	# Outdevs
-	for i in alsa oss sdl ; do
+	for i in alsa oss ; do
 		use ${i} || myconf+=( --disable-outdev=${i} )
 	done
+	use sdl || myconf+=( --disable-outdev=sdl2 )
 
 	# Decoders
 	use amr && myconf+=( --enable-version3 )
@@ -340,6 +346,13 @@
 		myconf+=( $(use_enable ${i%:*} ${i#*:}) )
 	done
 
+	if [[ ${ABI} == amd64 ]] && use cuda; then
+		myconf+=( --enable-nonfree --enable-cuda )
+		use libnpp && myconf+=( --enable-libnpp )
+		extra_cflags+=( "-I/opt/cuda/include" )
+		extra_ldflags+=( "-L/opt/cuda/lib64" )
+	fi
+
 	# (temporarily) disable non-multilib deps
 	if ! multilib_is_native_abi; then
 		for i in frei0r ; do
@@ -421,6 +434,8 @@
 		--cxx="$(tc-getCXX)" \
 		--ar="$(tc-getAR)" \
 		--optflags="${CFLAGS}" \
+		--extra-cflags="${extra_cflags[*]}" \
+		--extra-ldflags="${extra_ldflags[*]}" \
 		$(use_enable static-libs static) \
 		"${myconf[@]}"
 	echo "${@}"