administrator@administrator:~/Desktop$ ffmpeg -i file.mp4
WARNING: gnome-keyring:: couldn't connect to: /run/user/administrator/keyring-BXaHTB/pkcs11: No such file or directory
ffmpeg version 0.8.9-6:0.8.9-0ubuntu0.13.04.1, Copyright (c) 2000-2013 the Libav developers
  built on Nov  9 2013 19:09:48 with gcc 4.7.3
*** 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 'file.mp4':
  Metadata:
    major_brand     : avc1
    minor_version   : 0
    compatible_brands: avc1isom
    creation_time   : 2012-01-19 23:42:56
  Duration: 00:03:35.00, start: 0.000000, bitrate: 4710 kb/s
    Stream #0.0(eng): Video: h264 (Main), yuv420p, 1280x720 [PAR 1:1 DAR 16:9], 12553 kb/s, 59.94 fps, 59.94 tbr, 90k tbn, 119.88 tbc
    Metadata:
      creation_time   : 2012-01-19 23:42:56
    Stream #0.1(eng): Audio: aac, 48000 Hz, stereo, s16, 128 kb/s
    Metadata:
      creation_time   : 2012-01-19 23:42:56
    Stream #0.2(eng): Subtitle: text / 0x74786574, 0 kb/s
    Metadata:
      creation_time   : 2012-01-19 23:42:56
    Stream #0.3(eng): Subtitle: text / 0x74786574, 13 kb/s
    Metadata:
      creation_time   : 2012-01-19 23:42:56
At least one output file must be specified