ffmpeg -i test.ogv -vcodec libx264  -ab 92k -aspect 320:240  "out.mp4"
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.
[theora @ 0x134aac0] 7 bits left in packet 82
[ogg @ 0x13489c0] Estimating duration from bitrate, this may be inaccurate
Input #0, ogg, from 'test.ogv':
  Duration: N/A, start: 0.000000, bitrate: N/A
    Stream #0.0: Video: theora, yuv420p, 320x240 [PAR 1:1 DAR 4:3], 30 fps, 30 tbr, 30 tbn, 30 tbc
    Stream #0.1: Audio: vorbis, 4000 Hz, mono, s16, 0 kb/s
File 'out.mp4' already exists. Overwrite ? [y/N] y
[buffer @ 0x14ed9c0] w:320 h:240 pixfmt:yuv420p
[libx264 @ 0x14da900] using SAR=1/1
[libx264 @ 0x14da900] using cpu capabilities: MMX2 SSE2Fast SSSE3 FastShuffle SSE4.2 AVX
[libx264 @ 0x14da900] profile Main, level 1.3
[libx264 @ 0x14da900] 264 - core 120 r2151 a3f4407 - H.264/MPEG-4 AVC codec - Copyleft 2003-2011 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x1:0x111 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=0 me_range=16 chroma_me=1 trellis=1 8x8dct=0 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=1 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=0 b_adapt=1 b_bias=0 direct=1 weightb=0 open_gop=1 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
[libfaac @ 0x1350700] libfaac doesn't support this output format!
Output #0, mp4, to 'out.mp4':
    Stream #0.0: Video: libx264, yuv420p, 320x240 [PAR 1:1 DAR 4:3], q=-1--1, 90k tbn, 30 tbc
    Stream #0.1: Audio: libfaac, 4000 Hz, mono, s16, 92 kb/s
Stream mapping:
  Stream #0.0 -> #0.0
  Stream #0.1 -> #0.1
Error while opening encoder for output stream #0.1 - maybe incorrect parameters such as bit_rate, rate, width or height