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ffmpeg-builder
A collection of scripts for building ffmpeg and encoding content with the built ffmpeg.
Tested on:
- linux x86_64/aarch64 on:
- ubuntu
- fedora
- debian
- archlinux
- darwin aarch64
With these scripts you can:
- install required dependencies using
./scripts/install_deps.sh - build ffmpeg with the desired configuration using
./scripts/build.sh - encode a file using libsvtav1_psy and libopus using
./scripts/encode.sh - estimate the film grain of a given file using
./scripts/efg.sh
Building
This project supports multiple ways to build.
Configuration
Configuration is done through environment variables.
By default, this project will build a static ffmpeg binary in ./gitignore/sysroot/bin/ffmpeg.
The default enabled libraries included in the ffmpeg build are:
- libsvtav1_psy
- libopus
- libdav1d
- libaom
- librav1e
- libvmaf
- libx264
- libx265
- libwebp
- libmp3lame
The user-overridable compile options are:
ENABLE: configure what ffmpeg enables (default: libsvtav1_psy libopus libdav1d libaom librav1e libvmaf libx264 libx265 libwebp libmp3lame)PREFIX: prefix to install to, default is local install in ./gitignore/sysroot (default: local)STATIC: static or shared build (default: ON)LTO: enable link time optimization (default: ON)CLEAN: clean build directories before building (default: ON)PGO: enable profile guided optimization (default: OFF)ARCH: architecture type (x86-64-v{1,2,3,4}, armv8-a, etc) (default: native)OPT: optimization level (0-3) (default: 3)
Examples:
- only build libsvtav1_psy and libopus:
ENABLE='libsvtav1_psy libopus' ./scripts/build.sh - build shared libraries in custom path:
PREFIX=/usr/local STATIC=OFF ./scripts/build.sh - build without LTO at O1:
LTO=OFF OPT=1 ./scripts/build.sh
Native build
Make sure to install required dependencies using ./scripts/install_deps.sh. Then build ffmpeg with the desired configuration using ./scripts/build.sh.
Docker build
- choose a given distro from:
ubuntu fedora debian archlinux. - build a docker image with the required dependencies pre-installed using
./scripts/docker_build_image.sh<distro>. - run a docker image with the given arguments using
./scripts/docker_run_image.sh<distro>./scripts/build.sh
Docker builds support the same configuration options as native builds. For example to build ffmpeg on ubuntu with only libdav1d enabled:
./scripts/docker_build_image.sh ubuntu
ENABLE='libdav1d' ./scripts/docker_run_image.sh ubuntu ./scripts/build.sh
Encoding scripts
The encoding scripts are designed to be installed to system paths for re-use via symbolic links back to this repo using the -I flag.
Encoding with svtav1-psy and opus
encode -i input [options] output
[-P NUM] set preset (default: 3)
[-C NUM] set CRF (default: 25)
[-g NUM] set film grain for encode
[-p] print the command instead of executing it (default: false)
[-c] use cropdetect (default: false)
[-d] enable dolby vision (default: false)
[-v] print relevant version info
[-s] use same container as input, default is convert to mkv
[output] if unset, defaults to ${HOME}/av1-input-file-name.mkv
[-u] update script (git pull ffmpeg-builder)
[-I] system install at /usr/local/bin/encode
[-U] uninstall from /usr/local/bin/encode
- Uses svtav1-psy for the video encoder.
- Uses libopus for the audio encoder.
- Skips re-encoding av1/opus streams.
- Only maps audio streams that match the video stream language if the video stream has a defined language.
- Only maps english subtitle streams.
- Adds track statistics to the output mkv file and embeds the encoder versions to the output metadata. For example:
ENCODE : aa4d7e6
FFMPEG : 8.0
LIBOPUS : 1.5.2
LIBSVTAV1_PSY : 3.0.2-B
SVTAV1_PARAMS : film-grain=8:film-grain-denoise=1:tune=0:...
VIDEO_PARAMS : -crf 25 -preset 3 -g 240
Example usage:
- standard usage:
encode -i input.mkv output.mkv - print out what will be executed without starting encoding:
encode -i input.mkv -p - encode with film-grain synthesis value of 20 with denoising:
encode -g 20 -i input.mkv
Estimate film-grain
efg -i input [options]
[-l NUM] low value (default: 0)
[-s NUM] step value (default: 1)
[-h NUM] high value (default: 30)
[-p] plot bitrates using gnuplot
[-I] system install at /usr/local/bin/efg
[-U] uninstall from /usr/local/bin/efg
- Provides a way to estimate the ideal film-grain amount by encoding from low-high given values and the step amount.
- Observing the point of diminishing returns, one can make an informed decision for a given film-grain value to choose.
Example usage:
efg -i input.mkv -p
10000 +------------------------------------------------------------------------------------------------------------------------------------------+
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7000 |-+ **G* +-|
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6000 |-+ **G* +-|
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5000 |-+ **G** +-|
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3000 +------------------------------------------------------------------------------------------------------------------------------------------+
0 5 10 15 20 25 30