steps to build ffmpeg, ogg, vorbis, and opus

remember, the file formats have to be in .htaccess, and maybe in httpd.conf soon
AddType audio/wav wav
AddType audio/ogg oga ogg opus

ffmpeg:

notice how we disable the native vorbis and use one installed directly from vorbis:

./configure —disable-encoder=vorbis —enable-libvorbis —enable-libopus ;

live one:

export PKG_CONFIG_PATH=/usr/local/lib/pkgconfig ; ## 2015-03-01

 ./configure
     --disable-shared
     --enable-static  
     --enable-libopus
     --enable-libspeex
     --enable-libvorbis
     ;

make && make check && make install ;

ogg, ogg-tools, vorbis, vorbis-tools, and opus: (all five seemed to install pretty easily)

one needed this, but the ./configure will complain and tell you
./configure —disable-flac ;

to get information on a file:
ffmpeg -i marksFile.whatever ; ### will just give us codec information

ffmpeg create wav:
ffmpeg -i marksFile.whatever marksFile.wav ;

ffmpeg create opus:
ffmpeg -i marksFile.whatever -c:a libopus -b:a 64k -ar 48000 -ac 2 ./please_work.opus ;

ffmpeg create ogg:
ffmpeg -i please_work.flv -f ogg -acodec libvorbis -ac 2 please_work.ogg ;
ffmpeg -i please_work.flv -f ogg -acodec libvorbis -ac 1 please_work.ogg ;
ffmpeg -i please_work.flv -f ogg -acodec libvorbis -ac 2 -ab 128k -vn y please_work.ogg ;
-ac – channels

??
ffmpeg -i $file -f ogg -acodec libvorbis -ab 192k outputFile ;
ffmpeg -i $file -f ogg -acodec libvorbis -aq 6 outputFile ;
??

determine volume level:
/usr/local/bin/ffmpeg -i /blah/blah/clement.flv -af volumedetect -f null – ; ### volume

opusenc:
opusenc inputfile.wav outputfile.opus

opusdec:
opusdec inputfile.opus outputfile.wav

oggenc:
oggenc inputfile.wav -o outputfile.opus

oggdec inputfile.opus -o outputfile.wav