Output codec not supported when making psp movie.

Hi guys,

Sorry for the barrage of newb questions. :(

So I got ffmpeg to compile, with faac, mp3lame, and after the below  
failed the first time, even successfully recompiled with xvid (thanks  
to everyone here for the help with that) on my OSX box.

So I'm trying to make some psp movies, using the following command:

ffmpeg -i my.mov -f psp -r 14.985 -s 320x240 -b 768 -ar 24000 -ab 32  
M400002.MP4

and it tells me the audio codec is unsupported. (see below for  
complete message.)

Anyone know what I'm doing wrong? did I forget to enable one more  
necessary component on my build?

also, my.mov is known good.

Thanks again for all the help.

-- James



FFmpeg version CVS, Copyright (c) 2000-2004 Fabrice Bellard
  configuration:  --prefix=/opt/local --prefix=/opt/local --disable- 
vhook --mandir=/opt/local/share/man --extra-cflags=-DHAVE_LRINTF -- 
extra-ldflags=-d -L/opt/local/lib --enable-gpl
  libavutil version: 49.0.0
  libavcodec version: 51.2.0
  libavformat version: 50.2.1
  built on Feb 17 2006 15:11:43, gcc: 4.0.1 (Apple Computer, Inc.  
build 5247)
Input #0, mov,mp4,m4a,3gp,3g2, from 'my.mov':
  Duration: 00:02:07.8, start: 0.000000, bitrate: 30313 kb/s
  Stream #0.0(eng), 29.97 fps(r): Video: dvvideo, yuv411p, 720x480
  Stream #0.1(eng): Audio: pcm_s16be, 48000 Hz, stereo, 1536 kb/s
File 'M400002.MP4' already exists. Overwrite ? [y/N] y
Output #0, psp, to 'M400002.MP4':
  Stream #0.0, 14.99 fps(c): Video: mpeg4, yuv420p, 320x240, q=2-31,  
768 kb/s
  Stream #0.1: Audio: 0x0000, 24000 Hz, stereo, 32 kb/s
Stream mapping:
  Stream #0.0 -> #0.0
  Stream #0.1 -> #0.1
[mpeg4 @ 0x24ad00]removing common factors from framerate
Unsupported codec for output stream #0.1