The AMR codec from android is available under the Apache license. This license is incompatible with GPLv2, although it is compatible with GPLv3. You have the option of distributing FFmpeg under GPLv3, and can do so along with the apache-licensed AMR codec. However, the FFmpeg developers would like to maintain GPLv2 compatibility and for this reason have chosen not to include this code in FFmpeg.
The AMR codec from android is available under the Apache license. This license is incompatible with GPLv2, although it is compatible with GPLv3. You have the option of distributing FFmpeg under GPLv3, and can do so along with the apache-licensed AMR codec. However, the FFmpeg developers would like to maintain GPLv2 compatibility and for this reason have chosen not to include this code in FFmpeg.
Development of a new AMR decoder for inclusion in FFmpeg has been sponsored as part of the 2009 Google Summer of Code. For the status of this project, please see http:// wiki.multimedia .cx/index. php?title= FFmpeg_ Summer_ Of_Code