[MPlayer-users] encoding with libavcodec audio codec

[Eduardo Moreno]

Hi all.

I'm trying to compress a file using the "new" featured audio libavcodec.

I install the new "pre3" source package and i'm using:

mencoder file.avi -o file_compress.avi -ovc lavc -oac lavc -lavcopts 
vcodec=mpeg4:acodec=mp3

but i receive an error:
 > Couldn't open codec mp3, br=224

and it's the same with acodec=mp2 (the default)...

There is something that i am missing? the libavcodec must be compiled 
from CVS? or I'm misunderstanding the meaning of this new feature?

Thanks in advance to all.