ffmpeg -i bbc1sample.mp4 -v 9 -loglevel 99 -vb 300k -vsync 1 -async 1 -acodec libfaac -ab 192k -ac 2 -ar 44100 -vcodec mpeg4 bbc1-ok.mov
ffmpeg version N-31890-gecaf514, Copyright (c) 2000-2011 the FFmpeg developers
  built on Aug 14 2011 20:17:18 with clang 2.1 (tags/Apple/clang-163.7.1)
  configuration: --prefix=/opt/local --enable-gpl --enable-postproc --enable-swscale --enable-avfilter --enable-libmp3lame --enable-libvorbis --enable-libtheora --enable-libdirac --enable-libschroedinger --enable-libfaac --enable-libxvid --enable-libx264 --enable-libvpx --enable-libspeex --enable-nonfree --mandir=/opt/local/share/man --enable-shared --enable-pthreads --disable-indevs --cc=/Developer/usr/bin/clang --arch=x86_64
  libavutil    51. 12. 0 / 51. 12. 0
  libavcodec   53. 10. 0 / 53. 10. 0
  libavformat  53.  7. 0 / 53.  7. 0
  libavdevice  53.  3. 0 / 53.  3. 0
  libavfilter   2. 31. 1 /  2. 31. 1
  libswscale    2.  0. 0 /  2.  0. 0
  libpostproc  51.  2. 0 / 51.  2. 0
[h264 @ 0x7fa0e4026000] AVC: nal size 21839902
[h264 @ 0x7fa0e4026000] no frame!
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'bbc1sample.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    encoder         : Lavf54.25.104
  Duration: 00:00:49.58, start: 0.000000, bitrate: 901 kb/s
    Stream #0.0(und): Video: h264 (Main), yuv420p, 640x360 [SAR 1:1 DAR 16:9], 798 kb/s, 28.27 fps, 25 tbr, 1k tbn, 50 tbc
    Stream #0.1(und): Audio: aac, 44100 Hz, stereo, s16, 93 kb/s
File 'bbc1-ok.mov' already exists. Overwrite ? [y/N] y
[buffer @ 0x7fa0e3c2cde0] w:640 h:360 pixfmt:yuv420p tb:1/1000000 sar:1/1 sws_param:
[aac @ 0x7fa0e4013600] Unsupported bit depth: 0
Output #0, mov, to 'bbc1-ok.mov':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    encoder         : Lavf53.7.0
    Stream #0.0(und), 0, 1/25: Video: mpeg4, yuv420p, 640x360 [SAR 1:1 DAR 16:9], 1/25, q=2-31, 300 kb/s, 25 tbn, 25 tbc
    Stream #0.1(und), 0, 1/44100: Audio: libfaac, 44100 Hz, 2 channels, s16, 192 kb/s
Stream mapping:
  Stream #0.0 -> #0.0
  Stream #0.1 -> #0.1
Press [q] to stop, [?] for help
[h264 @ 0x7fa0e4026000] AVC: nal size 21839902
[h264 @ 0x7fa0e4026000] no frame!
Error while decoding stream #0.0
[h264 @ 0x7fa0e4026000] no picture
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frame= 1241 fps=223 q=31.0 Lsize=    3052kB time=00:00:49.57 bitrate= 504.4kbits/s dup=0 drop=160    
video:2105kB audio:920kB global headers:0kB muxing overhead 0.926839%