[MEncoder-users] encoding 3gp, mp4, wmv

[Michel Bardiaux]

RC wrote:
> On Wed, 03 Aug 2005 10:51:54 +0200
> Michel Bardiaux <mbardiaux at mediaxim.be> wrote:
> 
> 
>> Maybe you actually used -ab 16 or -ab 32, or you used a version 
>>of mp3lame that supports 12kbits while mine (debian woody, liblame0 
>>3.96-woody1) does not.
> 
> 
> No doubt the difference is the audio sample-rate in your source files.
> 
> For lame to produce files with low bitrates, the sample-rate has to be
> set to very low values, like 8000 or 16000.  Using lame directly, it
> will automatically resample to the needed rates, but used through
> mencoder/ffmpeg you often have to set these manually.
> 
You seem to have missed that -ab 8 works fine. Its -ab 12 that fails. 
And anyway my command did set the sample rate explicitly:

ffmpeg -i utc_1434.mpg -b 80 -vcodec wmv1 -acodec mp3 -ar 8000 -ab 12 -y 
out.wmv

-- 
Michel Bardiaux
R&D Director
MediaXim S.A.  Bd. du Souverain, 191  B-1160 Bruxelles
Tel : +32 2 790.29.41