Build the FFmpeg libraries, that can be used with Audacity 3.0.3 AppImage

ffmpeg_build.sh

#!/bin/bash

################################################################################
# Build the FFmpeg libraries, that can be used with Audacity 3.0.3 AppImage
# This requires build-essential, GCC, nasm or yasm from the distro of your choice.
# This script will create FFmpeg_Package_v2.2.2 in the current working directory,
# that contains the required libraries in the lib folder.
# The DT_RUNPATH is set to the location of the resulting package, so it is 
# not really movable
################################################################################


################################################################################
# Specify the URLs for the following packages
################################################################################

GSM='http://www.quut.com/gsm/gsm-1.0.19.tar.gz'
SPEEX='http://downloads.us.xiph.org/releases/speex/speex-1.2.0.tar.gz'
AMR='https://downloads.sourceforge.net/project/opencore-amr/opencore-amr/opencore-amr-0.1.5.tar.gz'
LAME='https://downloads.sourceforge.net/project/lame/lame/3.100/lame-3.100.tar.gz'
OPUS='https://archive.mozilla.org/pub/opus/opus-1.3.1.tar.gz'
FFMPEG='http://ffmpeg.org/releases/ffmpeg-2.2.2.tar.gz'

# Uncomment the following for snapshot builds
#FFMPEG='http://www.ffmpeg.org/releases/ffmpeg-snapshot.tar.bz2'

export CPPFLAGS="-fPIC"
export CFLAGS="-fPIC"
export CXXFLAGS="-fPIC"
export LDFLAGS="-fPIC"
################################################################################
# Define and create temporary installation destinations
################################################################################
ROOT="$(pwd)"
BUILD_DIR="${ROOT}/build"
PARENT="${ROOT}/.."
PREFIX="${BUILD_DIR}/local"
OUTPUT="${BUILD_DIR}/Output"

mkdir -p "$BUILD_DIR"
cd "$BUILD_DIR"

################################################################################
# Retrieve distributions
################################################################################
for VAR in GSM SPEEX AMR LAME OPUS FFMPEG
do
    eval URL="\$${VAR}"

    TAR=$(basename "$URL")

    if [ ! -e "${TAR}" ]
    then
        echo "Downloading ${TAR}"
        curl -L -o "${TAR}" "${URL}"
        if [ $? -ne 0 ]
        then
            echo "Failed to download required package...check to make sure URLs are valid"
            exit 1
        fi
    fi

    eval DIR="$(tar tf ${TAR} | sed -e '1s/\/.*//;2,$d')"

    [ ! -x "${DIR}" ] && tar xf "${TAR}"

    eval ${VAR}_DIR="${DIR}"
done

################################################################################
# Speed things up a bit
################################################################################
export MAKEFLAGS="-j $(nproc)"

mkdir -p "${PREFIX}/include"
mkdir -p "${PREFIX}/lib"
mkdir -p "${PREFIX}/lib/pkgconfig"
mkdir -p "${OUTPUT}"

export PKG_CONFIG_PATH="${PREFIX}/lib/pkgconfig"

echo "################################################################################"
echo "# Gsm"
echo "################################################################################"

if true
then
    cd "${GSM_DIR}"

    make CCINC="${CFLAGS}" LDINC="${LDFLAGS}" lib/libgsm.a
    if [ $? -ne 0 ]
    then
        echo "gsm make failed"
        exit 1
    fi

    mkdir -p "${PREFIX}/include/gsm"
    cp -pR inc/* "${PREFIX}/include/gsm"
    cp -pR $(find . -name \*.a) "${PREFIX}/lib"

    cd ..
fi

echo "################################################################################"
echo "# Speex"
echo "################################################################################"

if true
then
    cd "${SPEEX_DIR}"

    ./configure --enable-static=yes --enable-shared=no --disable-dependency-tracking
    if [ $? -ne 0 ]
    then
        echo "speex configure failed"
        exit 1
    fi

    make -C libspeex
    if [ $? -ne 0 ]
    then
        echo "speex make failed"
        exit 1
    fi

    make -C include
    if [ $? -ne 0 ]
    then
        echo "speex make failed"
        exit 1
    fi

    cp -pR include/* "${PREFIX}/include"
    cp -pR speex.pc "${PREFIX}/lib/pkgconfig"
    cp -pR $(find . -name \*.a) "${PREFIX}/lib"

    cd ..
fi

echo "################################################################################"
echo "# Opencore-amr"
echo "################################################################################"

if true
then
    cd "${AMR_DIR}"

    ./configure --enable-static=yes --enable-shared=no --disable-dependency-tracking
    if [ $? -ne 0 ]
    then
        echo "opencore-amr configure failed"
        exit 1
    fi

    make -C amrnb
    if [ $? -ne 0 ]
    then
        echo "opencore-amrnb make failed"
        exit 1
    fi

    make -C amrwb
    if [ $? -ne 0 ]
    then
        echo "opencore-amrwb make failed"
        exit 1
    fi

    mkdir -p "${PREFIX}/include/opencore-amrnb"
    mkdir -p "${PREFIX}/include/opencore-amrwb"
    cp -pR amrnb/*.h "${PREFIX}/include/opencore-amrnb"
    cp -pR amrwb/*.h "${PREFIX}/include/opencore-amrwb"
    cp -pR $(find . -name \*.a) "${PREFIX}/lib"

    cd ..
fi 

echo "################################################################################"
echo "# Lame"
echo "################################################################################"

if true
then 
    cd "${LAME_DIR}"

    ./configure --enable-static=yes --enable-shared=no --disable-dependency-tracking --disable-frontend
    if [ $? -ne 0 ]
    then
        echo "lame configure failed"
        exit 1
    fi

    make -C mpglib
    if [ $? -ne 0 ]
    then
        echo "lame make mpglib failed"
        exit 1
    fi

    make -C libmp3lame
    if [ $? -ne 0 ]
    then
        echo "lame make mp3lame failed"
        exit 1
    fi

    mkdir -p "${PREFIX}/include/lame"
    cp -p include/* "${PREFIX}/include/lame"
    cp -pR $(find . -name \*.a) "${PREFIX}/lib"

    cd ..
fi

echo "################################################################################"
echo "# Opus"
echo "################################################################################"

if true
then
    cd "${OPUS_DIR}"

    ./configure --enable-static=yes --enable-shared=no --disable-dependency-tracking --disable-doc --disable-extra-programs
    if [ $? -ne 0 ]
    then
        echo "opus configure failed"
        exit 1
    fi

    make
    if [ $? -ne 0 ]
    then
        echo "opus make failed"
        exit 1
    fi

    cp -pR opus.pc "${PREFIX}/lib/pkgconfig"
    cp -pR include/opus.h include/opus_multistream.h include/opus_types.h include/opus_defines.h include/opus_projection.h "${PREFIX}/include"
    cp -pR $(find .libs -name \*.a) "${PREFIX}/lib"

    cd ..
fi 

echo "################################################################################"
echo "# FFmpeg"
echo "################################################################################"

if true
then
    cd "${FFMPEG_DIR}"

    if true
    then
        ./configure --arch=x86_64 \
                       --cc=gcc \
                       --disable-ffplay \
                       --disable-ffprobe \
                       --disable-avdevice \
                       --disable-debug \
                       --disable-static \
                       --disable-doc \
                       --disable-swresample \
                       --disable-swscale \
                       --disable-postproc \
                       --disable-avfilter \
                       --enable-gpl \
                       --enable-nonfree \
                       --enable-version3 \
                       --enable-libopencore-amrnb \
                       --enable-libopencore-amrwb \
                       --enable-pthreads \
                       --enable-libspeex \
                       --enable-libgsm \
                       --enable-libmp3lame \
                       --enable-libopus \
                       --enable-shared \
                       --extra-cflags="-I../local/include" \
                       --extra-ldflags="-L../local/lib"
        if [ $? -ne 0 ]
        then
            echo "ffmpeg configure failed"
            exit 1
        fi

        make
        if [ $? -ne 0 ]
        then
            echo "ffmpeg make failed"
            exit 1
        fi
    fi

    ################################################################################
    # Get the FFmpeg version and create the package name
    ################################################################################
    if [ "${FFMPEG/*snapshot*/snapshot}" = "snapshot" ]
    then
        VER="$(date +%Y%m%d)"
    else
        VER="v$(<VERSION)"
    fi
    PKG="FFmpeg_Package_${VER}"

    mkdir -p "${ROOT}/${PKG}/"{docs,libs}
    cp COPYING.GPLv3 "${ROOT}/${PKG}/docs/License.txt"

    OUT_LIB_DIR="${ROOT}/${PKG}/libs"

    for lib in $(find . -name \*.so.\*)
    do
        cp -p "${lib}" "${OUT_LIB_DIR}"
        patchelf --set-rpath "${OUT_LIB_DIR}" "${OUT_LIB_DIR}/$(basename ${lib})"
    done

    cd ..
fi

rm -Rf "${BUILD_DIR}"

DT_RUNPATH is set to the location of the resulting package, so it is not really movable

I think there's a trick you can do with RUNPATH=$ORIGIN (or $ORIGIN/../../path/to/something) to make it movable.

Also, Audacity's AppRun script could look for FFMPEG and add it to LD_LIBRARY_PATH if it is found in a known location, such as in the same directory as the AppImage location.

ffmpeg_libs="$(dirname "${APPIMAGE}")/FFMPEG/libs"

if [[ -d "${ffmpeg_libs}" ]]; then
    export LD_LIBRARY_PATH="${ffmpeg_libs}:${LD_LIBRARY_PATH}"
fi

I've tried $ORIGIN with no luck. Seems like it always expands to an executable path. There is a chance I've mistaken something though.

Setting LD_LIBRARY_PATH will surely work, but I don't like messing with the global environment.

Also, I'm pretty sure that Audacity always looks in the LD_LIBRARY_PATH as we do dlopen("avformat.so.55") as a fallback measure.

Sorry, looked carefully for your workaround. It will work, but still, FFMPEG libraries won't be really relocatable anyway. Also, we will need to check all the dependencies, so it can work across at least a few of the systems

Thank you so much. This helped me to use the 3.0.4 AppImage. I tried build the libraries with --enable-shared but the AppImage doesn't recognize.

Great script. Thanks for creating. FYI, I've twice now had to re-run this script because the patchelf package isn't installed by default in a Linux Mint 20 environment. Takes a while to re-run because it blows away all the source and intermediate object files after it runs. Suggest adding an auto-install of patchelf or at least an error / warning to the user that the patchelf package must be installed prior to running the script.