$ ffmpeg -y -i 0106021043.3g2 -acodec libmp3lame -vcodec copy test.avi
WARNING: gnome-keyring:: couldn't connect to: /run/user/eric/keyring-ib0sud/pkcs11: No such file or directory
ffmpeg version 0.8.6-6:0.8.6-0ubuntu0.12.10.1, Copyright (c) 2000-2013 the Libav developers
  built on Apr  2 2013 17:02:16 with gcc 4.7.2
*** THIS PROGRAM IS DEPRECATED ***
This program is only provided for compatibility and will be removed in a future release. Please use avconv instead.
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '0106021043.3g2':
  Metadata:
    major_brand     : 3g2a
    minor_version   : 0
    compatible_brands: 3g2a
    creation_time   : 2012-01-06 15:44:12
  Duration: 00:00:20.06, start: 0.000000, bitrate: 127 kb/s
    Stream #0.0(eng): Video: mpeg4 (Simple Profile), yuv420p, 320x240 [PAR 1:1 DAR 4:3], 112 kb/s, 14.40 fps, 15 tbr, 15 tbn, 15 tbc
    Metadata:
      creation_time   : 2012-01-06 15:44:12
    Stream #0.1(eng): Audio: qcelp, 8000 Hz, 1 channels, flt, 14 kb/s
    Metadata:
      creation_time   : 2012-01-06 15:44:12
Incompatible sample format 'flt' for codec 'libmp3lame', auto-selecting format 's16'
Output #0, avi, to 'test.avi':
  Metadata:
    major_brand     : 3g2a
    minor_version   : 0
    compatible_brands: 3g2a
    creation_time   : 2012-01-06 15:44:12
    ISFT            : Lavf53.21.1
    Stream #0.0(eng): Video: mpeg4, yuv420p, 320x240 [PAR 1:1 DAR 4:3], q=2-31, 112 kb/s, 15 tbn, 15 tbc
    Metadata:
      creation_time   : 2012-01-06 15:44:12
    Stream #0.1(eng): Audio: libmp3lame, 8000 Hz, 1 channels, s16, 200 kb/s
    Metadata:
      creation_time   : 2012-01-06 15:44:12
Stream mapping:
  Stream #0.0 -> #0.0
  Stream #0.1 -> #0.1
Press ctrl-c to stop encoding
[avi @ 0xdcc740] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 184 >= 184
av_interleaved_write_frame(): Invalid argument