size=   33909kB time=4328.70 bitrate=  64.2kbits/s
video:0kB audio:33380kB global headers:0kB muxing overhead 1.584995%
FFmpeg version SVN-r26402, Copyright (c) 2000-2011 the FFmpeg developers
  built on Feb 10 2012 10:13:27 with gcc 4.1.2 20080704 (Red Hat 4.1.2-51)
  configuration:
  libavutil     50.36. 0 / 50.36. 0
  libavcore      0.16. 1 /  0.16. 1
  libavcodec    52.108. 0 / 52.108. 0
  libavformat   52.93. 0 / 52.93. 0
  libavdevice   52. 2. 3 / 52. 2. 3
  libavfilter    1.74. 0 /  1.74. 0
  libswscale     0.12. 0 /  0.12. 0
[aac @ 0x91a94c0] max_analyze_duration reached
[aac @ 0x91a94c0] Estimating duration from bitrate, this may be inaccurate
Input #0, aac, from '334357894600.aac':
  Duration: 00:12:09.74, bitrate: 26 kb/s
    Stream #0.0: Audio: aac, 16000 Hz, mono, s16, 26 kb/s
Output #0, mp4, to '334357894600.aac.mp4':
  Metadata:
    encoder         : Lavf52.93.0
    Stream #0.0: Audio: aac, 16000 Hz, mono, s16, 64 kb/s
Stream mapping:
  Stream #0.0 -> #0.0
Press [q] to stop encoding