I'm hoping to encode h265 streams using my new nvidia glx1650-super. As
a Debian devotee, the first thing I learned was that the drivers aren't
available in the Debian 10 ("stable") repository, so I did a fresh
install of Debian Bullseye ("testing"). That done, I attempted to
compile ffmpeg, following the ffmpeg compilation instructions provided
at
https://docs.nvidia.com/video-technologies/video-codec-sdk/ffmpeg-with-nvidia-gpu/
<https://docs.nvidia.com/video-technologies/video-codec-sdk/ffmpeg-with-nvidia-gpu/>.
I succeeded eventually, after encountering problems. Here are the
instructions provided at the aforementioned link, but with added
commentary about what happened and how I eventually succeeded. (I did
everything as superuser, so you won't see any "sudo" below.)
git clone https://git.videolan.org/git/ffmpeg/nv-codec-headers.git
No problem here.
cd nv-codec-headers && sudo make install && cd –
This worked, but the final invocation of cd was uninterpretable due to
the last character's being garbled (by my browser? or by Emacs?). I
followed this incantation with a "cd ..", which turned out to be the
right thing to do.
git clone https://git.ffmpeg.org/ffmpeg.git ffmpeg/
No problem here.
apt-get install build-essential yasm cmake libtool libc6 libc6-dev unzip wget
libnuma1 libnuma-dev
This turned out not to be enough packages. I ended up installing the following
packages, as well, even if some of them may not be strictly necessary.
I always install lots of utility packages which don't appear on this list, so
this list, too, may not be complete:
nvidia-detect
nvidia-driver
libnvidia-encode1
libnppc11
libnppial11
libnppicc11
libnppidei11
libnppif11
libnppig11
libnppim11
libnppist11
libnppisu11
libnppitc11
libnpps11
nvidia-cg-toolkit
nvidia-cuda-gdb
nvidia-cuda-toolkit
nvidia-cuda-toolkit-gcc
nvtop
./configure --enable-nonfree -–enable-cuda-sdk –enable-libnpp
--extra-cflags=-I/usr/local/cuda/include
--extra-ldflags=-L/usr/local/cuda/lib64
This incantation had 2 problems.
(1) --enable-cuda-sdk is an obsolete argument. I changed it to
--enable-cuda-nvcc
(2) The configure failed with the report: "ERROR: failed checking for nvcc."
Why?
The configure script checks nvcc by passing itan obsolete architecture code, "compute_30", which modern nvcc does not
support. <https://stackoverflow.com/questions/64774548/unsupported-gpu-architecture-compute-30-on-a-cuda-5-capable-gpu> I edited the part of the configure script that says:
if enabled cuda_nvcc; then
nvcc_default="nvcc"
nvccflags_default="-gencode arch=compute_30,code=sm_30 -O2"
else
nvcc_default="clang"
nvccflags_default="--cuda-gpu-arch=sm_30 -O2"
NVCC_C=""
fi
...so it instead said:
if enabled cuda_nvcc; then
nvcc_default="nvcc"
nvccflags_default="-gencode arch=compute_75,code=sm_75 -O2"
else
nvcc_default="clang"
nvccflags_default="--cuda-gpu-arch=sm_75 -O2"
NVCC_C=""
fi
...although apparently it would have been fine to change "30" to "50" instead of
"75" as I did.
Perhaps ffmpeg developers should make this change, or do something similar.
That done, the configure incantation that actually worked was:
./configure --enable-nonfree --enable-cuda-nvcc --enable-libnpp
--extra-cflags=-I/usr/local/cuda/include --extra-ldflags=-L/usr/local/cuda/lib64
make -j 8
No problem here.
make install
No problem here.
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