I am trying to convert a flv video to 3gp with mobile media converter.

But I am getting this error



Code:
>> Command executed:
ffmpeg -y -i "/home/tux/325 litre Malawi cichlid tank - YouTube.flv"  -vf scale=352:288 -f 3gp -vcodec h263 -r 15 -b 200k -acodec libvo_aacenc -ac 2 -ar 32000 -ab 64k "/home/tux/325 litre Malawi cichlid tank - YouTube.3gp"


>> Result: 
ffmpeg version 0.8.5-4:0.8.5-0ubuntu0.12.04.1, Copyright (c) 2000-2012 the Libav developers
  built on Jan 24 2013 18:01:36 with gcc 4.6.3
*** THIS PROGRAM IS DEPRECATED ***
This program is only provided for compatibility and will be removed in a future release. Please use avconv instead.
[flv @ 0x11bd9c0] Estimating duration from bitrate, this may be inaccurate
Input #0, flv, from '/home/tux/325 litre Malawi cichlid tank - YouTube.flv':
  Metadata:
    starttime       : 0
    totalduration   : 224
    totaldatarate   : 1262
    bytelength      : 35310013
    canseekontime   : true
    sourcedata      : B4A7DA925MM1362765817125709
    purl            : 
    pmsg            : 
  Duration: 00:03:43.80, start: 0.000000, bitrate: 1284 kb/s
    Stream #0.0: Video: h264 (Main), yuv420p, 854x478 [PAR 1:1 DAR 427:239], 1185 kb/s, 25 tbr, 1k tbn, 50 tbc
    Stream #0.1: Audio: aac, 44100 Hz, stereo, s16, 98 kb/s
[buffer @ 0x11bd940] w:854 h:478 pixfmt:yuv420p
[scale @ 0x11c04a0] w:854 h:478 fmt:yuv420p -> w:352 h:288 fmt:yuv420p flags:0x4
[h263 @ 0x1415140] Invalid pixel aspect ratio 3843/2629, limit is 255/255
Output #0, 3gp, to '/home/tux/325 litre Malawi cichlid tank - YouTube.3gp':
    Stream #0.0: Video: h263, yuv420p, 352x288 [PAR 3843:2629 DAR 427:239], q=2-31, 200 kb/s, 90k tbn, 15 tbc
    Stream #0.1: Audio: libfaac, 32000 Hz, stereo, s16, 200 kb/s
Stream mapping:
  Stream #0.0 -> #0.0
  Stream #0.1 -> #0.1
Error while opening encoder for output stream #0.0 - maybe incorrect parameters such as bit_rate, rate, width or height
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