[MEncoder-users] Use of AMR in Mencoder for 3GP

[Bill Eldridge]

I've attempted to get AMR support into mencoder via
libavcodec (amr_nb-fixed & amr_wb) from ffmpeg CVS & adding

audiocodec ffamr
  info "FFMPEG amr codec"
  status working
  format 0x726D6173
  driver ffmpeg
  dll "amr_nb"

to my codecs.conf, but the following:

mencoder fifo.asx -ovc lavc -lavcopts vcodec=h263:vpass=1:acodec=amr 
-oac lavc -vf scale=176:144 -o test.3gp >&menc.errs &

just returns  "Audio LAVC, couldn't find encoder for codec amr"

Am I making an obvious mistake or is there a better way to do this or
is it currently a lost cause?

Thanks,
Bill