I am trying to join two wmv files. I tried some ffmpeg commands but they
are not working.

I tried from
https://trac.ffmpeg.org/wiki/How%20to%20concatenate%20%28join,%20merge%29%20media%20files#differentcodecbut
these commands are not working. getting errors.

and ffmpeg is suggesting me to use avconv
so I tried using avconv from
http://libav.org/faq.html#How-can-I-join-video-files_003f

but from avconv I am not able to control bitrate so final joined video have
very poor quality

I am seeking clean way or some working command.

I am giving details of files

alok@alok:~$ ffprobe video1.wmv
avprobe version 0.8.9-6:0.8.9-0ubuntu0.13.10.1, Copyright (c) 2007-2013 the
Libav developers
  built on Nov  9 2013 19:15:22 with gcc 4.8.1
[wmv3 @ 0x95b4020] Extra data: 8 bits left, value: 20
Input #0, asf, from 'video1.wmv':
  Metadata:
    WMFSDKVersion   : 12.0.9200.16384
    WMFSDKNeeded    : 0.0.0.0000
    IsVBR           : 1
    VBR Peak        : 274
    Buffer Average  : 271
  Duration: 00:00:06.13, start: 0.000000, bitrate: 1205 kb/s
    Stream #0.0(eng): Video: wmv3 (Main), yuv420p, 960x720, 1157 kb/s,
30.30 tbr, 1k tbn, 1k tbc
[wmv3 @ 0x95b4020] Extra data: 8 bits left, value: 20


alok@alok:~$ ffprobe video2.wmv
avprobe version 0.8.9-6:0.8.9-0ubuntu0.13.10.1, Copyright (c) 2007-2013 the
Libav developers
  built on Nov  9 2013 19:15:22 with gcc 4.8.1
Input #0, asf, from 'splitter.wmv':
  Metadata:
    encoder         : Lavf53.21.1
  Duration: 00:00:02.96, start: 0.000000, bitrate: 1244 kb/s
    Stream #0.0: Video: msmpeg4, yuv420p, 960x720, 30 tbr, 1k tbn, 1k tbc
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