[Ffmpeg-devel] AAC bitrate

Luca Abeni lucabe72
Fri Feb 10 17:04:23 CET 2006

Hello Dennis,

I just repeated the test, and I get 8kbps:
host3:/tmp/ffmpeg-test# ./ffmpeg -i test.wav -acodec aac -ac 1 -ar 8000 -ab 8 -vol 150 test1.3gp
FFmpeg version CVS, Copyright (c) 2000-2004 Fabrice Bellard
  configuration:  --cc=gcc-4.0 --enable-faac --extra-cflags=-I /tmp/aac/include --extra-ldflags=-L /tmp/aac/lib 
  libavutil version: 49.0.0
  libavcodec version: 51.2.0
  libavformat version: 50.2.1
  built on Feb 10 2006 16:52:52, gcc: 4.0.3 20060128 (prerelease) (Debian 4.0.2-8)
Input #0, wav, from 'test.wav':
  Duration: 00:00:50.0, start: 0.000000, bitrate: 1411 kb/s
  Stream #0.0: Audio: pcm_s16le, 44100 Hz, stereo, 1411 kb/s
Output #0, 3gp, to 'test1.3gp':
  Stream #0.0: Audio: aac, 8000 Hz, mono, 8 kb/s
Stream mapping:
  Stream #0.0 -> #0.0
Press [q] to stop encoding
size=      52kB time=49.5 bitrate=   8.6kbits/s    
video:0kB audio:48kB global headers:0kB muxing overhead 7.577720%

So, I think you are using a too old version of ffmpeg?

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