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update README.md

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This commit is contained in:
Levon Gevorgyan
2025-11-28 13:31:30 -06:00
parent aa4d7e61f1
commit 9596f68a9e
8 changed files with 284 additions and 59 deletions
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2
lib/build.sh
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@@ -454,7 +454,7 @@ do_build() {
FB_FUNC_NAMES+=('build')
# shellcheck disable=SC2034
FB_FUNC_DESCS['build']='build ffmpeg with desired configuration'
FB_FUNC_DESCS['build']='build ffmpeg with the desired configuration'
build() {
set_compile_opts || return 1

25
lib/compile_opts.sh
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@@ -3,21 +3,30 @@
# variables used externally
# shellcheck disable=SC2034
# default compile options
# compile option descriptions
unset FB_COMP_OPTS_DESC
declare -Ag FB_COMP_OPTS_DESC
# clean build directories before building
# default compile options
FB_COMP_OPTS_DESC['CLEAN']='clean build directories before building'
DEFAULT_CLEAN=true
# enable link time optimization
FB_COMP_OPTS_DESC['LTO']='enable link time optimization'
DEFAULT_LTO=ON
# optimization level (0-3)
FB_COMP_OPTS_DESC['OPT']='optimization level (0-3)'
DEFAULT_OPT=3
# static or shared build
FB_COMP_OPTS_DESC['STATIC']='static or shared build'
DEFAULT_STATIC=ON
# architecture type (x86-64-v{1,2,3,4}, armv8-a, etc)
FB_COMP_OPTS_DESC['ARCH']='architecture type (x86-64-v{1,2,3,4}, armv8-a, etc)'
DEFAULT_ARCH=native
# prefix to install to, default is local install
FB_COMP_OPTS_DESC['PREFIX']='prefix to install to, default is local install in ./gitignore/sysroot'
DEFAULT_PREFIX='local'
# configure what ffmpeg enables
FB_COMP_OPTS_DESC['ENABLE']='configure what ffmpeg enables'
DEFAULT_ENABLE="\
libsvtav1_psy \
libopus \

4
lib/docker.sh
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@@ -100,7 +100,7 @@ docker_login() {
}
FB_FUNC_NAMES+=('docker_build_image')
FB_FUNC_DESCS['docker_build_image']='build docker image with required dependencies pre-installed'
FB_FUNC_DESCS['docker_build_image']='build a docker image with the required dependencies pre-installed'
FB_FUNC_COMPLETION['docker_build_image']="${VALID_DOCKER_IMAGES[*]}"
docker_build_image() {
local image="$1"
@@ -243,7 +243,7 @@ docker_load_image() {
}
FB_FUNC_NAMES+=('docker_run_image')
FB_FUNC_DESCS['docker_run_image']='run docker image with given flags'
FB_FUNC_DESCS['docker_run_image']='run a docker image with the given arguments'
FB_FUNC_COMPLETION['docker_run_image']="${VALID_DOCKER_IMAGES[*]}"
docker_run_image() {
local image="$1"

4
lib/efg.sh
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@@ -25,8 +25,8 @@ set_efg_opts() {
local minOpt=1
# using all
local maxOpt=${numOpts}
test $# -lt ${minOpt} && echo_fail "not enough arguments" && efg_usage && return 1
test $# -gt ${maxOpt} && echo_fail "too many arguments" && efg_usage && return 1
test $# -lt ${minOpt} && efg_usage && return 1
test $# -gt ${maxOpt} && efg_usage && return 1
local OPTARG OPTIND
while getopts "${opts}" flag; do
case "${flag}" in

10
lib/encode.sh
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@@ -152,10 +152,10 @@ encode_usage() {
echo -e "\t[-p] print the command instead of executing it (default: ${PRINT_OUT})"
echo -e "\t[-c] use cropdetect (default: ${CROP})"
echo -e "\t[-d] enable dolby vision (default: ${DV_TOGGLE})"
echo -e "\t[-v] Print relevant version info"
echo -e "\t[-v] print relevant version info"
echo -e "\t[-s] use same container as input, default is convert to mkv"
echo -e "\n\t[output] if unset, defaults to ${HOME}/"
echo -e "\n\t[-u] update script (git pull at ${REPO_DIR})"
echo -e "\n\t[output] if unset, defaults to \${HOME}/av1-input-file-name.mkv"
echo -e "\n\t[-u] update script (git pull ffmpeg-builder)"
echo -e "\t[-I] system install at ${ENCODE_INSTALL_PATH}"
echo -e "\t[-U] uninstall from ${ENCODE_INSTALL_PATH}"
return 0
@@ -181,8 +181,8 @@ set_encode_opts() {
local minOpt=1
# using all + output name
local maxOpt=$((numOpts + 1))
test $# -lt ${minOpt} && echo_fail "not enough arguments" && encode_usage && return 1
test $# -gt ${maxOpt} && echo_fail "too many arguments" && encode_usage && return 1
test $# -lt ${minOpt} && encode_usage && return 1
test $# -gt ${maxOpt} && encode_usage && return 1
local optsUsed=0
local OPTARG OPTIND
while getopts "${opts}" flag; do

118
lib/readme.sh
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@@ -1,22 +1,136 @@
#!/usr/bin/env bash
make_bullet_points() {
for arg in "$@"; do
echo "- ${arg}"
done
}
gen_function_info() {
local funcName="$1"
echo "${FB_FUNC_DESCS[${funcName}]} using \`./scripts/${funcName}.sh\`"
}
gen_compile_opts_info() {
for opt in "${FB_COMP_OPTS[@]}"; do
echo "- \`${opt}\`: ${FB_COMP_OPTS_DESC[${opt}]}"
done
}
FB_FUNC_NAMES+=('gen_readme')
FB_FUNC_DESCS['gen_readme']='generate project README.md'
gen_readme() {
local readme="${REPO_DIR}/README.md"
echo "
A collection of scripts for building ffmpeg and encoding content with the built ffmpeg
# ffmpeg-builder
A collection of scripts for building \`ffmpeg\` and encoding content with the built \`ffmpeg\`.
Tested on:
- linux x86_64/aarch64 on:
$(printf ' - %s\n' "${VALID_DOCKER_IMAGES[@]}")
- darwin aarch64
With these scripts you can:
1. $(gen_function_info install_deps)
2. $(gen_function_info build)
3. $(gen_function_info encode)
4. $(gen_function_info efg)
# 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:
$(make_bullet_points ${DEFAULT_ENABLE})
The user-overridable compile options are:
$(gen_compile_opts_info)
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 $(gen_function_info install_deps). Then $(gen_function_info build).
### Docker build
1. choose a given distro from: ${VALID_DOCKER_IMAGES[*]}.
2. $(gen_function_info docker_build_image) \`<distro>\`.
3. $(gen_function_info docker_run_image) \`<distro>\` \`./scripts/build.sh\`
Docker builds support the same configuration options as native builds. For example:
\`ENABLE='libdav1d' ./scripts/docker_run_image.sh ubuntu ./scripts/build.sh\` to build \`ffmpeg\` on ubuntu with only \`libdav1d\` enabled.
# Encoding scripts
The encoding scripts are designed to be installed to system paths for re-use via symbolic links back to this repo.
## Encoding with svtav1-psy and opus
\`\`\`bash
$(COLOR=OFF print_cmds)
$(encode)
\`\`\`
- Uses svtav1-psy for the video encoder
- Uses libopus for the audio encoder
- Skips re-encoding av1/opus content
- 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
\`\`\`bash
$(efg)
\`\`\`
- Provides a way to estimate the ideal film-grain amount by encoding from low-high given values and the step amount.
- Observing the point of diminishing returns, one can make an informed decision for a given film-grain value to choose.
Example usage:
- \`efg -i input.mkv -p\`
\`\`\`
1 +------------------------------------------------------------------------------------------------------+
| *****G***** + + + |
| *****G** '/tmp/plot.dat' ***G*** |
0.95 |-+ ***** +-|
| **G* |
| *** |
| **** |
0.9 |-+ *G* +-|
| **** |
| **** |
0.85 |-+ *G* +-|
| *** |
| **** |
0.8 |-+ *G* +-|
| *** |
| **** |
| *G* |
0.75 |-+ *** +-|
| **** |
| *G* |
0.7 |-+ *** +-|
| ** |
| *** |
| *G* |
0.65 |-+ *** +-|
| **** |
| + + + *|
0.6 +------------------------------------------------------------------------------------------------------+
\`\`\`
" >"${readme}"
}