conflict: media-video/ffmpeg:=[nvenc]

Message

Xywa · Post by **Xywa** » Mon Nov 12, 2018 1:50 pm

Hi,

I got such error during update:

  (media-video/ffmpeg-4.1:0/56.58.58::gentoo, ebuild scheduled for merge) conflicts with
    media-video/ffmpeg:=[nvenc] required by (media-video/obs-studio-22.0.3:0/0::gentoo, ebuild scheduled for merge)
                         ^^^^^

Code: Select all

# equery u obs-studio
[ Legend : U - final flag setting for installation]
[        : I - package is installed with flag     ]
[ Colors : set, unset                             ]
 * Found these USE flags for media-video/obs-studio-22.0.3:
 U I
 + + alsa                           : Add support for media-libs/alsa-lib (Advanced Linux Sound Architecture)
 - - fdk                            : Enable libfdk support for AAC encoding.
 - - imagemagick                    : Use ImageMagick for image loading instead of FFmpeg.
 - - jack                           : Add support for the JACK Audio Connection Kit
 - - luajit                         : Build support for scripting via Luajit.
 + + nvenc                          : Enable NVENC encoding for nVidia video cards.
 - - pulseaudio                     : Add support for PulseAudio sound server
 - - python                         : Build support for scripting via Python 3.
 - - python_single_target_python3_4 : Build for Python 3.4 only
 - - python_single_target_python3_5 : Build for Python 3.5 only
 + + python_single_target_python3_6 : Build for Python 3.6 only
 - - python_targets_python3_4       : Build with Python 3.4
 - - python_targets_python3_5       : Build with Python 3.5
 + + python_targets_python3_6       : Build with Python 3.6
 - - speex                          : Enable noise suppression filter support via media-libs/speexdsp.
 + + truetype                       : Add support for FreeType and/or FreeType2 fonts
 - - v4l                            : Enable support for video4linux (using linux-headers or userspace libv4l
                                      libraries)

Post by **fedeliallalinea** » Mon Nov 12, 2018 1:57 pm

You should enable nvenc to ffmpeg

Post by **candrews** » Tue Nov 13, 2018 1:54 am

media-video/ffmpeg-4* is missing the nvenc use flag.I checked the commit logs and I don't see a commit noting the removal of the flag, nor can I find a bug requesting its removal, so I think it was accidentally excluded.

I've reported a bug requested in be added: https://bugs.gentoo.org/671040 I've also attached a PR to the bug; hopefully this can be resolved soon.

Post by **fedeliallalinea** » Tue Nov 13, 2018 9:38 am

candrews wrote:media-video/ffmpeg-4* is missing the nvenc use flag.I checked the commit logs and I don't see a commit noting the removal of the flag, nor can I find a bug requesting its removal, so I think it was accidentally excluded.

It's seems replaced by video_cards_nvidia

amd64/package.use.mask wrote:# Alexis Ballier <aballier@gentoo.org> (31 Jan 2017)
# nvidia drivers are unmasked here
media-video/ffmpeg -nvenc

krinn · Post by **krinn** » Tue Nov 13, 2018 1:55 pm

so nvenc useflag was remove from ffmpeg in favor of VIDEOCARDS="nvidia" = nvenc built
still someone has to fix that obs-studio ebuild to not requiere anymore an ffmpeg built with nvenc useflag

while i find the logic in ffmpeg ebuild smart (if you don't have an nvidia card why would you want nvenc), but in fact, it would had been just better to kept that nvenc useflag and make ffmpeg built depends on it instead of videocards ; because the problem is Alexis Ballier "wrongly" assume "if someone has an nvidia card, he then would want always an ffmpeg built with the codec for it", which is bloat for someone that doesn't have an nvidia card able to use the codec or that just doesn't want to use it (it is limited in many aspects)

Post by **candrews** » Tue Nov 13, 2018 4:04 pm

krinn wrote:so nvenc useflag was remove from ffmpeg in favor of VIDEOCARDS="nvidia" = nvenc built
still someone has to fix that obs-studio ebuild to not requiere anymore an ffmpeg built with nvenc useflag

See https://bugs.gentoo.org/671084

Post by **Chiitoo** » Tue Nov 13, 2018 4:35 pm

krinn wrote:so nvenc useflag was remove from ffmpeg in favor of VIDEOCARDS="nvidia" = nvenc built
still someone has to fix that obs-studio ebuild to not requiere anymore an ffmpeg built with nvenc useflag

It was there in 21.1.2, but removed since FFmpeg 4 was masked, and as such, it all triggered a QA violation.

The 9999 version of 'media-video/obs-studio' already/still supports '>=media-video/ffmpeg-4', but yeah, since the latter is unmasked now, it might be time to look into re-adding said support to other versions as well. :]

Post by **candrews** » Tue Nov 13, 2018 4:39 pm

Chiitoo wrote: The 9999 version of 'media-video/obs-studio' already/still supports '>=media-video/ffmpeg-4', but yeah, since the latter is unmasked now, it might be time to look into re-adding said support to other versions as well. :]

Here's a PR: https://github.com/gentoo/gentoo/pull/10409

I'm happy to merge it for you if you'd like.

baaann · Post by **baaann** » Tue Nov 13, 2018 5:56 pm

krinn wrote:
while i find the logic in ffmpeg ebuild smart (if you don't have an nvidia card why would you want nvenc), but in fact, it would had been just better to kept that nvenc useflag and make ffmpeg built depends on it instead of videocards ; because the problem is Alexis Ballier "wrongly" assume "if someone has an nvidia card, he then would want always an ffmpeg built with the codec for it", which is bloat for someone that doesn't have an nvidia card able to use the codec or that just doesn't want to use it (it is limited in many aspects)

It seems that it is not only bloat, I had an issue a few days ago where ffmpeg 4 was forcing the latest nvidia-drivers which are not suitable for my old nvidia card and it appears to me that this could well be the cause? Unfortunately I am particularly busy at the moment and therefore just masked ffmpeg 4 to avoid the problem

Kollin · Post by **Kollin** » Wed Nov 21, 2018 7:17 am

baaann wrote:
krinn wrote:
while i find the logic in ffmpeg ebuild smart (if you don't have an nvidia card why would you want nvenc), but in fact, it would had been just better to kept that nvenc useflag and make ffmpeg built depends on it instead of videocards ; because the problem is Alexis Ballier "wrongly" assume "if someone has an nvidia card, he then would want always an ffmpeg built with the codec for it", which is bloat for someone that doesn't have an nvidia card able to use the codec or that just doesn't want to use it (it is limited in many aspects)
It seems that it is not only bloat, I had an issue a few days ago where ffmpeg 4 was forcing the latest nvidia-drivers which are not suitable for my old nvidia card and it appears to me that this could well be the cause? Unfortunately I am particularly busy at the moment and therefore just masked ffmpeg 4 to avoid the problem

Code: Select all

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

NOTE: The --autounmask-keep-masks option will prevent emerge
      from creating package.unmask or ** keyword changes.

 * In order to avoid wasting time, backtracking has terminated early
 * due to the above autounmask change(s). The --autounmask-backtrack=y
 * option can be used to force further backtracking, but there is no
 * guarantee that it will produce a solution.

Yes! ffmpeg wants to upgrade nvidia-drivers to an incompatible version!

Post by **fedeliallalinea** » Wed Nov 21, 2018 7:23 am

Kollin wrote:Yes! ffmpeg wants to upgrade nvidia-drivers to an incompatible version!

Because ffmpeg-4.1 need >=nv-codec-headers-8.1.24.2 that need >=x11-drivers/nvidia-drivers-390.25

krinn · Post by **krinn** » Thu Nov 22, 2018 3:41 am

Would be wiser to come back to nvenc useflag rather than the bad assumption from video_cards

Post by **fedeliallalinea** » Thu Nov 22, 2018 6:46 am

krinn wrote:Would be wiser to come back to nvenc useflag rather than the bad assumption from video_cards

I would like to state that I am not an expert in this field, but changing nvidia with nvenc change something for dependencies?

Post by **Chiitoo** » Thu Nov 22, 2018 10:07 am

There's some context about the change in Bug 671040 - media-video/ffmpeg-4* missing nvenc use flag, as well as the bugs mentioned therein.

baaann · Post by **baaann** » Thu Nov 22, 2018 6:42 pm

Chiitoo wrote:There's some context about the change in Bug 671040 - media-video/ffmpeg-4* missing nvenc use flag, as well as the bugs mentioned therein.

Thanks Chiltoo, after reading the bug I have looked at the configure script and it appears there is an option for disabling ffnvcodec and I have added a note suggesting that the useflag nvenc should be reinstated for older cards. Hopefully it will be read as the bug is marked RESOLVED INVALID?

Post by **Chiitoo** » Thu Nov 22, 2018 7:57 pm

baaann wrote:Hopefully it will be read as the bug is marked RESOLVED INVALID?

At the very least those on the CC list will still get mail for comments on it, so yeah, I do think it will be read. :]

krinn · Post by **krinn** » Fri Nov 23, 2018 2:55 am

baaann wrote:I have added a note suggesting that the useflag nvenc should be reinstated for older cards.

Not just for older cards, you could use a brand new nvidia card and still don't want that codec.