nobody@prior:>./ffmpeg/bin/ffmpeg -y -i import/oneday.mpg -acodec mp3 -ar 22050 -ab 32 -f flv v/8.flv
FFmpeg version SVN-rUNKNOWN, Copyright (c) 2000-2006 Fabrice Bellard, et al.
  configuration:  --disable-ffserver --disable-ffplay --prefix=/home/sdb/public_html/vid/ffmpeg_build 
  libavutil version: 49.0.2
  libavcodec version: 51.23.0
  libavformat version: 50.6.0
  built on Oct 31 2006 04:24:39, gcc: 3.4.6 20060404 (Red Hat 3.4.6-3)

Seems that stream 0 comes from film source: 25.00 (25025/1001) -> 25.00 (25/1)
Input #0, mpeg, from 'import/oneday.mpg':
  Duration: 00:04:12.1, start: 0.220000, bitrate: 1263 kb/s
  Stream #0.0[0x1e0]: Video: mpeg2video, yuv420p, 320x240, 1024 kb/s, 25.00 fps(r)
  Stream #0.1[0x1c0]: Audio: mp2, 44100 Hz, stereo, 160 kb/s
Output #0, flv, to 'v/8.flv':
  Stream #0.0: Video: flv, yuv420p, 320x240, q=2-31, 200 kb/s, 25.00 fps(c)
  Stream #0.1: Audio: 0x0000, 22050 Hz, stereo, 32 kb/s
Stream mapping:
  Stream #0.0 -> #0.0
  Stream #0.1 -> #0.1
Unsupported codec for output stream #0.1