media-video/ffmpeg-4 doesn't have an nvenc use flag; instead, it has a video_cards_nvidia use flag. See bug 671040 Originally reported at https://forums.gentoo.org/viewtopic-t-1089320-highlight-nvenc.html
Looks like this was already fixed for -9999 in https://github.com/gentoo/gentoo/commit/e3fd6616680a91a2882c24d830a7f191f4aa77b7 - it just hasn't been applied to the release ebuild yet.
(In reply to Craig Andrews from comment #1) > it just hasn't been applied to the release ebuild yet. It was. :] https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=ce3a0897ea8dabf75455760193f004e9c9839a70 But yeah, guess it's time to look into re-adding it. Thanks!
The bug has been closed via the following commit(s): https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=e217c8c785e711fc69680129a5701cd00d800786 commit e217c8c785e711fc69680129a5701cd00d800786 Author: Craig Andrews <candrews@gentoo.org> AuthorDate: 2018-11-13 16:10:42 +0000 Commit: Craig Andrews <candrews@gentoo.org> CommitDate: 2018-11-13 20:33:06 +0000 media-video/obs-studio: Support ffmpeg 4 The USE="nvenc" in '>=media-video/ffmpeg-4' has been replaced with 'video_cards_nvidia'. Closes: https://bugs.gentoo.org/671084 Package-Manager: Portage-2.3.51, Repoman-2.3.12 Signed-off-by: Craig Andrews <candrews@gentoo.org> media-video/obs-studio/obs-studio-21.1.2.ebuild | 7 ++++++- media-video/obs-studio/obs-studio-22.0.3.ebuild | 7 ++++++- media-video/obs-studio/obs-studio-9999.ebuild | 7 ++++++- 3 files changed, 18 insertions(+), 3 deletions(-)
Now ffmpeg wants to upgrade nvidia-drivers to an incompatible version! emerge -pv ffmpeg These are the packages that would be merged, in order: Calculating dependencies ... done! [ebuild U #] x11-drivers/nvidia-drivers-410.78:0/410::gentoo [340.107:0/340::gentoo] USE="X acpi driver%* kms%* multilib tools uvm%* -compat% -gtk3% -pax_kernel -static-libs -wayland%" ABI_X86="32 (64) (-x32)" 106.504 KiB [ebuild N ] media-libs/nv-codec-headers-8.1.24.2::gentoo ABI_X86="32 (64) (-x32)" 53 KiB [ebuild U ] media-video/ffmpeg-4.1:0/56.58.58::gentoo [3.4.4:0/55.57.57::gentoo] USE="X alsa bzip2 encode gpl hardcoded-tables iconv mp3 network opencl opengl openssl postproc pulseaudio sdl speex svg threads truetype vaapi vdpau vorbis x264 xcb xvid zlib (-altivec) -amr -amrenc (-appkit) -bluray -bs2b -cdio -chromaprint -chromium -codec2% -cpudetection -debug -doc -fdk -flite -fontconfig -frei0r -fribidi -gcrypt -gme -gmp -gnutls -gsm -iec61883 -ieee1394 -jack -jpeg2k -kvazaar -ladspa -libaom% -libass -libcaca -libdrm -libilbc -libressl% -librtmp -libsoxr -libv4l -lv2% -lzma (-mipsdspr1) (-mipsdspr2) (-mipsfpu) (-mmal) -modplug -openal -openh264 -opus -oss -pic -rubberband -samba -snappy -ssh -static-libs -test -theora -twolame -v4l -vpx -wavpack -webp -x265 -zeromq -zimg -zvbi (-celt%) (-nvenc%)" ABI_X86="32 (64) (-x32)" CPU_FLAGS_X86="mmx mmxext sse sse2 sse3 sse4_1 sse4_2 ssse3 -3dnow -3dnowext -aes -avx -avx2 -fma3 -fma4 -xop" FFTOOLS="aviocat cws2fws ffescape ffeval ffhash fourcc2pixfmt graph2dot ismindex pktdumper qt-faststart sidxindex trasher" VIDEO_CARDS="nvidia%*" 10.437 KiB Total: 3 packages (2 upgrades, 1 new), Size of downloads: 116.994 KiB The following mask changes are necessary to proceed: (see "package.unmask" in the portage(5) man page for more details) # required by media-libs/nv-codec-headers-8.1.24.2::gentoo # required by media-video/ffmpeg-4.1::gentoo[video_cards_nvidia] # required by @selected # required by @world (argument) # /etc/portage/package.mask/nvidia-drivers: =x11-drivers/nvidia-drivers-410.78
