avprobe version 0.8.10-6:0.8.10-0ubuntu0.12.10.1, Copyright (c) 2007-2013 the Libav developers
  built on Feb  6 2014 20:56:10 with gcc 4.7.2
[mp3 @ 0x16eaba0] max_analyze_duration reached
Input #0, mp3, from 'output_file.mp3':
  Metadata:
    major_brand     : qt
    minor_version   : 537199360
    compatible_brands: qt
    creation_time   : 2014-09-25 18:18:54
    encoder         : Lavf53.21.1
  Duration: 00:30:02.65, start: 0.000000, bitrate: 192 kb/s
    Stream #0.0: Audio: mp3, 44100 Hz, stereo, s16, 192 kb/s