build static sox with lame and flac support for AWS lambda
You need to add the libvorbis and flac libraries to your static build and flag the sox build to include them. I have made changes to the script from your example questions to show you how this done.
sudo yum update
sudo yum install gcc44 gcc-c++ libgcc44 cmake –y
# now grab sox and its dependencies
mkdir -p deps
mkdir -p deps/unpacked
mkdir -p deps/built
mkdir -p deps/built/libmad
mkdir -p deps/built/sox
mkdir -p deps/built/lame
mkdir -p deps/built/libvorbis
mkdir -p deps/built/flac
wget -O deps/sox-14.4.2.tar.bz2 "http://downloads.sourceforge.net/project/sox/sox/14.4.2/sox-14.4.2.tar.bz2?r=http%3A%2F%2Fsourceforge.net%2Fprojects%2Fsox%2Ffiles%2Fsox%2F14.4.2%2F&ts=1416316415&use_mirror=heanet"
wget -O deps/libmad-0.15.1b.tar.gz "http://downloads.sourceforge.net/project/mad/libmad/0.15.1b/libmad-0.15.1b.tar.gz?r=http%3A%2F%2Fsourceforge.net%2Fprojects%2Fmad%2Ffiles%2Flibmad%2F0.15.1b%2F&ts=1416316482&use_mirror=heanet"
wget -O deps/lame-3.99.5.tar.gz "http://downloads.sourceforge.net/project/lame/lame/3.99/lame-3.99.5.tar.gz?r=http%3A%2F%2Fsourceforge.net%2Fprojects%2Flame%2Ffiles%2Flame%2F3.99%2F&ts=1416316457&use_mirror=kent"
wget -O deps/libvorbis-1.3.5.tar.xz "http://downloads.xiph.org/releases/vorbis/libvorbis-1.3.5.tar.xz"
wget -O deps/flac-1.3.2.tar.xz "https://superb-dca2.dl.sourceforge.net/project/flac/flac-src/flac-1.3.2.tar.xz"
# unpack the dependencie
pushd deps/unpacked
tar xvfp ../sox-14.4.2.tar.bz2
tar xvfp ../libmad-0.15.1b.tar.gz
tar xvfp ../lame-3.99.5.tar.gz
tar xvfp ../libvorbis-1.3.5.tar.xz
tar xvfp ../flac-1.3.2.tar.xz
popd
# build libmad, statically
pushd deps/unpacked/libmad-0.15.1b
./configure --disable-shared --enable-static --prefix=$(realpath ../../built/libmad)
# Patch makefile to remove -fforce-mem
sed s/-fforce-mem//g < Makefile > Makefile.patched
cp Makefile.patched Makefile
make
make install
popd
# build lame, statically
pushd deps/unpacked/lame-3.99.5
./configure --disable-shared --enable-static --prefix=$(realpath ../../built/lame)
make
make install
popd
# build libvorbis, statically
pushd deps/unpacked/libvorbis-1.3.5
./configure --disable-shared --enable-static --prefix=$(realpath ../../built/libvorbis)
make
make install
popd
# build flac, statically
pushd deps/unpacked/flac-1.3.2
./configure --disable-shared --enable-static --prefix=$(realpath ../../built/flac)
make
make install
popd
# build sox, statically
pushd deps/unpacked/sox-14.4.2
./configure --disable-shared --enable-static --prefix=$(realpath ../../built/sox) \
LDFLAGS="-L$(realpath ../../built/libmad/lib) -L$(realpath ../../built/lame/lib) -L$(realpath ../../built/libvorbis/lib) -L$(realpath ../../built/flac/lib)" \
CPPFLAGS="-I$(realpath ../../built/libmad/include) -I$(realpath ../../built/lame/include) -I$(realpath ../../built/libvorbis/include) -I$(realpath ../../built/flac/include)" \
--with-mad --with-lame --with-libvorbis --with-flac --without-oggvorbis --without-oss --without-sndfile --without-gomp
make -s
make install
popd
cp deps/built/sox/bin/sox .
rm -rf deps/built
rm -rf deps/unpacked
How do I reduce the play time of a voice mp3 file with sox to 75%?
Try this (with input.wav as your input file)
sox input.wav output.wav speed 1.33
Taken from this, its example 13.
Regarding pitch correction, if the pitch should stay the same, use this command instead.
sox input.wav output.wav tempo 1.33
Regarding filesize. It depends on the audio format you want to use. If it is compressed, select settings for higher compression. If not, you may want to convert it to mono, reduce the sample rate or bits.
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