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How to compile FFmpeg from scratch for your project

Prepare for FFmpeg installation

Install ffmpeg build dependencies according to this website:

sudo apt-get update -qq && sudo apt-get -y install \
autoconf \
automake \
build-essential \
cmake \
git-core \
libass-dev \
libfreetype6-dev \
libsdl2-dev \
libtool \
libva-dev \
libvdpau-dev \
libvorbis-dev \
libxcb1-dev \
libxcb-shm0-dev \
libxcb-xfixes0-dev \
pkg-config \
texinfo \
wget \
zlib1g-dev \
libx264-dev \
libx265-dev

Make your own ffmpeg directory:

ffmpeg_dir=<absolute_path_to_empty_directory_for_ffmpeg_stuff>
mkdir -p $ffmpeg_dir/build $ffmpeg_dir/bin

Build yasm:

cd $ffmpeg_dir
wget -O yasm-1.3.0.tar.gz https://www.tortall.net/projects/yasm/releases/yasm-1.3.0.tar.gz && \
tar xzvf yasm-1.3.0.tar.gz && \
cd yasm-1.3.0 && \
./configure --prefix="$ffmpeg_dir/build" --bindir="$ffmpeg_dir/bin" && \
make && \
make install

Build nasm:

cd $ffmpeg_dir
wget https://www.nasm.us/pub/nasm/releasebuilds/2.13.03/nasm-2.13.03.tar.bz2 && \
tar xjvf nasm-2.13.03.tar.bz2 && \
cd nasm-2.13.03 && \
./autogen.sh && \
PATH="${ffmpeg_dir}/bin:$PATH" ./configure --prefix="${ffmpeg_dir}/build" --bindir="${ffmpeg_dir}/bin" && \
make && \
make install

Get nvcodec headers:

cd $ffmpeg_dir
git clone https://git.videolan.org/git/ffmpeg/nv-codec-headers.git
cd nv-codec-headers

At this point you will have to pick the right version of the headers. You need the one that matches your driver. For instance:

git checkout n8.2.15.8

will get you a version that works with with Linux 410.48 or newer (see README file). If you mess up here, you will later get an error that looks like this:

[hevc_nvenc @ 0x7fc67c03a580] Cannot load libnvidia-encode.so.1
[hevc_nvenc @ 0x7fc67c03a580] The minimum required Nvidia driver for nvenc is 418.30 or newer

Now create a modified Makefile that points to the right location:

tmp_var="${ffmpeg_dir//"/"/"\/"}"
sed "s/\/usr\/local/${tmp_var}\/build/g" Makefile > Makefile.tmp
make -f Makefile.tmp install

Compile FFMpeg

Clone and configure ffmpeg to your needs. The following configuration gives you cuda and the hardware accelerated nvidia (nvenc) encoding for x264/x265. This builds an ffmpeg that has more components than you need.

cd $ffmpeg_dir
git clone https://github.com/FFmpeg/FFmpeg.git	
cd $ffmpeg_dir/FFmpeg

To build full NVidia encode/decode support, do this:

PATH="$ffmpeg_dir/bin:$PATH" PKG_CONFIG_PATH="$ffmpeg_dir/build/lib/pkgconfig" ./configure --prefix=${ffmpeg_dir}/build --extra-cflags=-I${ffmpeg_dir}/build/include --extra-ldflags=-L${ffmpeg_dir}/build/lib --bindir=${ffmpeg_dir}/bin --enable-cuda-nvcc --enable-cuvid --enable-libnpp --extra-cflags=-I/usr/local/cuda/include/ --extra-ldflags=-L/usr/local/cuda/lib64/ --enable-gpl --enable-nvenc --enable-libx264 --enable-libx265 --enable-nonfree --enable-shared

If you don't have an NVidia card, do this:

PATH="$ffmpeg_dir/bin:$PATH" PKG_CONFIG_PATH="$ffmpeg_dir/build/lib/pkgconfig" ./configure --prefix=${ffmpeg_dir}/build --extra-cflags=-I${ffmpeg_dir}/build/include --extra-ldflags=-L${ffmpeg_dir}/build/lib --bindir=${ffmpeg_dir}/bin --enable-gpl --enable-libx264 --enable-libx265 --enable-nonfree --enable-shared

Now build and install (runs for a few minutes!):

PATH="$ffmpeg_dir/bin:${PATH}:/usr/local/cuda/bin" make && make install && hash -r