[Ffmpeg-devel] AAC bitrate

Media Streaming Services mediastream
Mon Feb 6 19:04:50 CET 2006

Hi All,

got a small problem here, I've compiled
ffmpeg version CVS, build 3276800, Copyright (c) 2000-2004 Fabrice Bellard
 configuration:  --enable-amr_nb --enable-amr_wb --enable-faac
--enable-faad --enable-xvid --enable-mp3lame --enable-gpl
--enable-pthreads --disable-ffserver --disable-ffplay --enable-libogg
--enable-vorbis --enable-pp --enable-shared

used faac and faad as you can see, unfortunately, I can't produce AAC
audio files (mp4 and 3gp) at ***8 kbit bitrate*** (which supposed to be the
lowest setting for AAC- 1 channel/8000 Hz).

The lowest ffmpeg was able to produce is 12.6 kbps AAC encoded file.

./ffmpeg -i 1.wav -acodec aac -ac 1 -ar 8000 -ab 8 -vol 150 test1.3gp

QuickTime (in Windows) can produce the aac file @8KBIT, but I just
hate to use QT

Please advise.


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