[MEncoder-users] How to get ".mp3" audio rather than "mp4a" audio?

[Reimar Döffinger]

On Tue, Nov 16, 2010 at 11:12:28AM +0000, Sheppard, Mark wrote:
> On 15 November 2010 16:54 The Wanderer wrote:
> > What's the command line you're currently using?
> 
> Sorry - forgot that!  Here's an example command line:
> 
> mencoder 588.wmv -o 588.mp4 -oac mp3lame -lameopts cbr:br=128 -channels 2 -srate 44100 -ofps 25 -of lavf -ovc x264 -x264encopts bitrate=1500:subq=5:8x8dct:frameref=2:threads=auto:global_header:nocabac:nob_adapt:bframes=0:keyint=50 -lavfopts format=mp4 -vf harddup,scale=1280:720

I can't see any way that would result in a video with mp4a audio.
I don't have an mencoder with lame/x264, but
-ovc lavc -oac lavc -of lavf -lavfopts format=mp4
for me results in a file with mp2 audio.