john@john-P-6831FX:~/Videos/movies2$ avconv -i MOV012.wmv MOV012.mp4
avconv version 9.18-6:9.18-0ubuntu0.14.04.1, Copyright (c) 2000-2014 the Libav developers
  built on Mar 16 2015 13:19:10 with gcc 4.8 (Ubuntu 4.8.2-19ubuntu1)
[wmv3 @ 0x1c2e400] Extra data: 8 bits left, value: 0
Guessed Channel Layout for  Input Stream #0.1 : stereo
Input #0, asf, from 'MOV012.wmv':
  Metadata:
    WMFSDKVersion   : 11.0.6002.18049
    WMFSDKNeeded    : 0.0.0.0000
    IsVBR           : 0
  Duration: 00:00:18.24, start: 0.000000, bitrate: 6837 kb/s
    Stream #0.0(eng): Video: wmv3 (Main), yuv420p, 720x480, 8192 kb/s, PAR 8:9 DAR 4:3, 29.97 fps, 30 tbr, 1k tbn
    Stream #0.1(eng): Audio: wmav2, 32000 Hz, stereo, fltp, 32 kb/s
[libx264 @ 0x1c33da0] using SAR=8/9
[libx264 @ 0x1c33da0] using cpu capabilities: MMX2 SSE2Fast SSSE3 Cache64 SlowShuffle
[libx264 @ 0x1c33da0] profile High, level 3.0
[libx264 @ 0x1c33da0] 264 - core 142 r2389 956c8d8 - H.264/MPEG-4 AVC codec - Copyleft 2003-2014 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=3 lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.25 aq=1:1.00
encoder 'aac' is experimental and might produce bad results.
Add '-strict experimental' if you want to use it.