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Installation script of CUDA-accelerated `ffmpeg` with NVIDIA Encoder ( docker NVIDIA Encoder https://github.com/markus-perl/ffmpeg-build-script )
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# set number of cores to use
num_proc="$(nproc)"
NUM_CORES=$((num_proc <= 2 ? num_proc : num_proc - 1))
echo "Using up to $NUM_CORES cores"
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this errors out
Using up to 158 cores
Installing prerequisites
Get:1 http://developer.download.nvidia.com/compute/cuda/repos/ubuntu1804/x86_64 InRelease [1,581 B]
Hit:2 http://us.archive.ubuntu.com/ubuntu jammy InRelease
Get:3 http://us.archive.ubuntu.com/ubuntu jammy-updates InRelease [119 kB]
Get:4 http://us.archive.ubuntu.com/ubuntu jammy-backports InRelease [109 kB]
Err:1 http://developer.download.nvidia.com/compute/cuda/repos/ubuntu1804/x86_64 InRelease
The following signatures couldn't be verified because the public key is not available: NO_PUBKEY A4B469963BF863CC
Get:5 http://us.archive.ubuntu.com/ubuntu jammy-security InRelease [110 kB]
Hit:6 https://ppa.launchpadcontent.net/graphics-drivers/ppa/ubuntu jammy InRelease
Ign:7 https://ppa.launchpadcontent.net/nilarimogard/webupd8/ubuntu jammy InRelease
Err:8 https://ppa.launchpadcontent.net/nilarimogard/webupd8/ubuntu jammy Release
404 Not Found [IP: 185.125.190.52 443]
Reading package lists... Done
W: GPG error: http://developer.download.nvidia.com/compute/cuda/repos/ubuntu1804/x86_64 InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY A4B469963BF863CC
E: The repository 'http://developer.download.nvidia.com/compute/cuda/repos/ubuntu1804/x86_64 InRelease' is not signed.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
E: The repository 'https://ppa.launchpadcontent.net/nilarimogard/webupd8/ubuntu jammy Release' does not have a Release file.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
also I had to add the following to auto create your staging folders
Create folders
mkdir -p $DIR_USR_BIN
mkdir -p $DIR_INSTALL_ROOT
mkdir -p $DIR_FFMPEG_BUILD
mkdir -p $DIR_FFMPEG_SOURCES