Hello, is there somebody who knows how to generate a mp3 file as output ! I compile the source everything is alright. configure was started befor with the following parameter: ./configure --enable-mp3lame --enable-faac --enable-amr_nb --enable- amr_wb --enable-pthreads I want to generate an output file type mp3 with audio-codec also mp3. When i define -acodec mp3 the program tell me unknown codec. When i only define -f mp3 then the output is codec mp2 sample: ./ffmpeg -benchmark -y -vn -i 'eqmr7EGfF.mp3' -f mp3 -ac 1 -ar 22050 -ab 24 -acodec mp3 'eqmr7EGfF-test.mp3' result is codec mp2: (but i want to have mp3) Input #0, mp3, from '/home/www/web2/html/MOBILEXXL.DE/music/ eqmr7EGfF.mp3': Duration: 00:00:30.0, start: 0.000000, bitrate: 128 kb/s Stream #0.0: Audio: mp3, 44100 Hz, stereo, 128 kb/s Output #0, mp2, to 'eqmr7EGfF-test.mp3': Stream #0.0: Audio: 0x0000, 22050 Hz, mono, 24 kb/s Stream mapping: Stream #0.0 -> #0.0 Unsupported codec for output stream #0.0 Thanks for help Joerg