I\'m trying to convert AMR audio files to MP3 using FFMPEG. I\'m running on Ubuntu 10.10 with VBox on Windows 7 host and i\'ve installed ffmpeg by running sudo apt-get
I solved this by following the instructions here http://pasindudps.blogspot.com/2010/12/compiling-ffmpeg-in-ubuntu-1010.html after doing so I had no problem doing the audio conversion
EDIT: the link I posted is dead now, here's another one for Linux systems http://linuxers.org/tutorial/how-install-ffmpeg-linux and here's another for Mac OS X http://jungels.net/articles/ffmpeg-howto.html
UPDATED ANSWER:
Since I had to use this solution seems like the process has gotten much easier. On Mac OS you can simply use Homebrew:
brew install ffmpeg --with-fdk-aac --with-ffplay --with-freetype --with-libass --with-libquvi --with-libvorbis --with-libvpx --with-opus --with-x265
Only Linux systems you can install from the repository:
sudo apt-get install ffmpeg
or
su -c 'yum install ffmpeg'
The FFMPEG website now has updated documentation and downloads for Windows, Mac or Linux as well; in case any further information is required.