compiling ffmpeg (and mplayer) with amr7 support
http://www.penguin.cz/~utx/amr
apt-get install libgsm1-dev toolame libgsm1-dev libvorbis-dev libogg-dev
apt-get install libfaad2-dev
apt-get install subversion
apt-get install libgsm1-dev libgsmme-dev
apt-get install unzip
apt-get install liba52-0.7.4-dev
apt-get install patch

wget http://downloads.xvid.org/downloads/xvidcore-1.1.2.tar.bz2
tar -jxf xvidcore-1.1.2.tar.bz2
wget http://mesh.dl.sourceforge.net/sourceforge/lame/lame-3.97.tar.gz
tar -zxvf lame-3.97.tar.gz
cd lame-3.97
./configure --prefix=/usr;make;make install
cd ..
cd xvidcore-1.1.2/build/generic/
./configure --prefix=/usr;make;make install
cd ../../../

svn checkout svn://svn.mplayerhq.hu/ffmpeg/trunk ffmpeg
cd ffmpeg/libavcodec/
mkdir amrwb_float
cd amrwb_float
wget http://www.3gpp.org/ftp/Specs/archive/26_series/26.204/26204-510.zip
unzip 26204-510.zip
unzip 26204-510_ANSI-C_source_code.zip
cd ..
mkdir amr_float
cd amr_float
wget http://www.3gpp.org/ftp/Specs/archive/26_series/26.104/26104-510.zip
unzip 26104-510.zip
unzip 26104-510_ANSI_C_source_code.zip
cd ../../
wget http://ftp.penguin.cz/pub/users/utx/amr/amrwb-7.0.0.1.tar.bz2
tar -jxvf amrwb-7.0.0.1.tar.bz2
cd amrwb-7.0.0.1
./configure --prefix=/usr ; make ; make install
wget http://ftp.penguin.cz/pub/users/utx/amr/amrnb-6.1.0.4.tar.bz2
tar -jxvf amrnb-6.1.0.4.tar.bz2
cd amrnb-6.1.0.4
./configure --prefix=/usr ; make ; make install

./configure --prefix=/usr --enable-libamr-nb --enable-libamr-wb --enable-libogg --enable-libvorbis --enable-libgsm --enable-libxvid --enable-liba52 --enable-libmp3lame --enable-gpl;
make ; make install
cd ..
wget http://www2.mplayerhq.hu/MPlayer/releases/MPlayer-1.0rc1.tar.bz2
wget http://www2.mplayerhq.hu/MPlayer/releases/codecs/essential-20061022.tar.bz2
tar -jxvf essential-20061022.tar.bz2
mkdir /usr/lib/codecs/
cd essential-20061022
mv * /usr/lib/codecs/
cd ..
cd MPlayer-1.0rc1/
./configure --prefix=/opt/mplayer
make; make install