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|
#!/usr/bin/env bash
# This script builds FFmpeg libraries without any functional features.
#
# IMPORTANT:
# The resulting library files have to be LGPL version of FFmpeg libraries.
# - Do not enable `--enable-nonfree` and `--enable-gpl`.
# - Do not enable third party library integrations like x264.
#
# This script is not meant to build useful FFmpeg libraries, but to build
# a skeleton of FFmpeg libraries that are use only during the build process of
# torchaudio.
#
# The resulting FFmpeg libraries should not be shipped either.
set -eux
prefix="${FFMPEG_ROOT}"
args=""
if [[ "$OSTYPE" == "msys" ]]; then
args="--toolchain=msvc"
fi
ffmpeg_version="${FFMPEG_VERSION:-4.1.8}"
if [[ "${ffmpeg_version}" == "master" ]]; then
archive="https://github.com/FFmpeg/FFmpeg/archive/master.tar.gz"
else
archive="https://github.com/FFmpeg/FFmpeg/archive/refs/tags/n${ffmpeg_version}.tar.gz"
fi
build_dir=$(mktemp -d -t ffmpeg-build.XXXXXXXXXX)
cleanup() {
rm -rf "${build_dir}"
}
trap 'cleanup $?' EXIT
(
cd "${build_dir}"
# NOTE:
# When changing the version of FFmpeg, update the README so that the link to the source points
# the same version.
curl -LsS -o ffmpeg.tar.gz "${archive}"
tar -xf ffmpeg.tar.gz --strip-components 1
./configure \
--prefix="${prefix}" \
--disable-all \
--disable-everything \
--disable-programs \
--disable-doc \
--disable-debug \
--disable-autodetect \
--disable-x86asm \
--disable-iconv \
--disable-encoders \
--disable-decoders \
--disable-hwaccels \
--disable-muxers \
--disable-demuxers \
--disable-parsers \
--disable-bsfs \
--disable-protocols \
--disable-devices \
--disable-filters \
--disable-asm \
--disable-static \
--enable-shared \
--enable-rpath \
--enable-pic \
--enable-avcodec \
--enable-avdevice \
--enable-avfilter \
--enable-avformat \
--enable-avutil ${args}
make -j install
ls ${prefix}/*
)
# macOS: Fix rpath so that the libraries are searched dynamically in user environment.
# In Linux, this is handled by `--enable-rpath` flag.
if [[ "$(uname)" == Darwin ]]; then
major_ver=${ffmpeg_version:0:1}
if [[ ${major_ver} == 4 ]]; then
avutil=libavutil.56
avcodec=libavcodec.58
avformat=libavformat.58
avdevice=libavdevice.58
avfilter=libavfilter.7
elif [[ ${major_ver} == 5 ]]; then
avutil=libavutil.57
avcodec=libavcodec.59
avformat=libavformat.59
avdevice=libavdevice.59
avfilter=libavfilter.8
elif [[ ${ffmpeg_version} == master || ${major_ver} == 6 ]]; then
avutil=libavutil.58
avcodec=libavcodec.60
avformat=libavformat.60
avdevice=libavdevice.60
avfilter=libavfilter.9
else
printf "Error: unexpected FFmpeg major version: %s\n" ${major_ver}
exit 1;
fi
otool="/usr/bin/otool"
# NOTE: miniconda has a version of otool and install_name_tool installed and we want
# to use the default sytem version instead of the miniconda version since the miniconda
# version can produce inconsistent results
# Attempt to use /usr/bin/otool as our default otool
if [[ ! -e ${otool} ]]; then
otool="$(which otool)"
fi
install_name_tool="/usr/bin/install_name_tool"
# Attempt to use /usr/bin/install_name_tool as our default install_name_tool
if [[ ! -e ${install_name_tool} ]]; then
install_name_tool="$(which install_name_tool)"
fi
# list up the paths to fix
for lib in ${avcodec} ${avdevice} ${avfilter} ${avformat} ${avutil}; do
${otool} -l ${prefix}/lib/${lib}.dylib | grep -B2 ${prefix}
done
# Replace the hardcoded paths to @rpath
${install_name_tool} \
-change ${prefix}/lib/${avutil}.dylib @rpath/${avutil}.dylib \
-delete_rpath ${prefix}/lib \
-id @rpath/${avcodec}.dylib \
${prefix}/lib/${avcodec}.dylib
${otool} -l ${prefix}/lib/${avcodec}.dylib | grep -B2 ${prefix}
${install_name_tool} \
-change ${prefix}/lib/${avformat}.dylib @rpath/${avformat}.dylib \
-change ${prefix}/lib/${avcodec}.dylib @rpath/${avcodec}.dylib \
-change ${prefix}/lib/${avutil}.dylib @rpath/${avutil}.dylib \
-delete_rpath ${prefix}/lib \
-id @rpath/${avdevice}.dylib \
${prefix}/lib/${avdevice}.dylib
${otool} -l ${prefix}/lib/${avdevice}.dylib | grep -B2 ${prefix}
${install_name_tool} \
-change ${prefix}/lib/${avutil}.dylib @rpath/${avutil}.dylib \
-delete_rpath ${prefix}/lib \
-id @rpath/${avfilter}.dylib \
${prefix}/lib/${avfilter}.dylib
${otool} -l ${prefix}/lib/${avfilter}.dylib | grep -B2 ${prefix}
${install_name_tool} \
-change ${prefix}/lib/${avcodec}.dylib @rpath/${avcodec}.dylib \
-change ${prefix}/lib/${avutil}.dylib @rpath/${avutil}.dylib \
-delete_rpath ${prefix}/lib \
-id @rpath/${avformat}.dylib \
${prefix}/lib/${avformat}.dylib
${otool} -l ${prefix}/lib/${avformat}.dylib | grep -B2 ${prefix}
${install_name_tool} \
-delete_rpath ${prefix}/lib \
-id @rpath/${avutil}.dylib \
${prefix}/lib/${avutil}.dylib
${otool} -l ${prefix}/lib/${avutil}.dylib | grep -B2 ${prefix}
fi
|
