Hi, i got a GTX 970. Did anyone manage to get nvenc to work with ffmpeg?

ffmpeg -i input.mkv -c:v nvenc_h264 test.mkv
[nvenc_h264 @ 0x15c5a40] >> dl_fn->cu_init(0) - failed with error code 0x3e7

Do i need new drivers? i use Slackware 14.1
$ ls /var/log/packages/|grep nvidia
nvidia-driver-352.63-x86_64-1_SBo
nvidia-kernel-352.63_3.10.17-x86_64-3_SBo

Building ffmpeg like this:
CPPFLAGS=-I/home/root/ffmpeg/nvidia_video_sdk_6.0.1/Samples/common/inc/ ./configure \
--prefix=/usr \
--libdir=/usr/lib${LIBDIRSUFFIX} \
--shlibdir=/usr/lib${LIBDIRSUFFIX} \
--docdir=/usr/doc/$PRGNAM-$VERSION/html \
--mandir=/usr/man \
--disable-debug \
--enable-shared \
--disable-static \
--enable-pthreads \
--enable-libtheora \
--enable-libvorbis \
--enable-gpl \
--enable-version3 \
--enable-postproc \
--enable-swscale \
--enable-x11grab \
--enable-avfilter \
--enable-gnutls \
--enable-libcdio \
--enable-libssh \
--enable-libcaca \
--enable-libsmbclient \
--enable-opengl \
--arch=$ARCH \
--enable-nvenc \
$openjpeg \
$libdc1394 \
$mp3lame \
$libfaac \
$libxvid \
$libx264 \
$libspeex \
$dirac_fast \
$non_free \
$libgsm \
$libvpx \
$librtmp \
$opencore_amr \
$libfrei0r \
$libcelt \
$libbluray \
$libass \
$libopenal \
$libiec61883 \
$libilbc \
$libmodplug \
$libopus \
$libtwolame \
$ladspa \
$pulse \
$fdk \
$libflite \
$libquvi \
$libvidstab \
$libx265 \
$libzvbi \
$libopencv \
$decklink \
$ssl

# ls /home/root/ffmpeg/nvidia_video_sdk_6.0.1/Samples/common/inc/|grep -i nvEncodeAPI.h
nvEncodeAPI.h

hi slacktroll, looking at the the list of supported GPU doesn't seem GTX 970 is between them... it seems to work only with some high end GPUs (no such hardware here).

also, the Readme.txt of the nvidia_video_sdk_6.0.1 says that drivers 358.x or greater are needed: you can find those on SBo's git master branch but they have been tested only on current.

It says
Desktop and Mobile Computers (2 encode concurrent streams per system)
GeForce (Kepler & Maxwell GPUs only)

Geforce GTX 970 is Maxwell.

... I installed the new drivers from SBo's git master. They worked. Seems that i need to read more manuals.
Thanks for you help!

GREAT NEWS PONCE!

How to fix:
1) upgrade drivers to drivers in sbo branch (361.xx)

2)
get nvidia_video_sdk_6.0.1
add this to ffmpeg.SlackBuild
CPPFLAGS=-I/root/ffmpeg/nvidia_video_sdk_6.0.1/Samples/common/inc/ ./configure \

3)
/usr/lib64# ln -s libnvidia-encode.so.361.45.11 libnvidia-encode.so

4)
get ffmpeg-3.1 for more human readable errors, see below

NEW ERROR MESSAGE ->
[nvenc_h264 @ 0x21ab1a0] This encoder is deprecated, use 'h264_nvenc' instead
[nvenc_h264 @ 0x21ab1a0] Cannot load libnvidia-encode.so
/usr/lib64# ln -s libnvidia-encode.so.361.45.11 libnvidia-encode.so

AND IT WORKS

Thank you ponce!

Benchmark:
# ffmpeg -i input.mkv -c:v nvenc_h264 test.mkv
frame=12159 fps=705 q=22.0 Lsize= 7534kB time=00:03:22.86 bitrate= 304.2kbits/s speed=11.8x
# ffmpeg -i input.mkv -c:v h264 test.mkv
frame=12159 fps=205 q=-1.0 Lsize= 7859kB time=00:03:22.86 bitrate= 317.3kbits/s speed=3.42x

1 members found this post helpful.

I cant compile VLC with ffmpeg + nvenc can you reproduce this please?

Can you give me the link to vlc source? i can give it a try.. for the record, i use ffmpeg-3.1 and -current nvidia drivers...

I gave up, went back to
nvidia-driver-352.63-x86_64-1_SBo
nvidia-kernel-352.63_4.4.26-x86_64-3_SBo

nvenc works anyway. must be wrong on their homepage.

new drivers really sucks, fpsdrops etc.