Hi all, I would like to understand well it in general, but I have a little problem. I would like to use ffmpeg to convert amr files into wav or other. I installed via yum from freshrpms all ffmpeg (and all related dependencies) but when I trie to convert my file with the command ffmpeg -i Reg.amr Reg.wav I receive this output FFmpeg version CVS, Copyright (c) 2000-2004 Fabrice Bellard configuration: --prefix=/usr --libdir=/usr/lib64 --mandir=/usr/share/man --incdir=/usr/include/ffmpeg --extra-cflags=-fPIC --enable-mp3lame --enable-libogg --enable-vorbis --enable-theora --enable-faad --enable-faac --enable-libgsm --enable-xvid --enable-x264 --enable-a52 --enable-a52bin --enable-dts --enable-pp --enable-shared --enable-pthreads --enable-gpl --disable-opts --disable-strip I think that I have to download the source package and rebuild with --enable-amr_nb --enable-amr_wb --enable-mp3lame I don't know how to make it via rpm. Can someone explain me all the steps? Tnx Ambrogio