ubuntu@ip-10-0-0-196:~/prav$ ffmpeg -i sintel-2048-surround.mp4 -c:v libx264 -c:a libfaac -vf "scale=720:-1" -crf 22 sintel-720-h264-ffmpeg.mp4
ffmpeg version git-2012-09-26-299c0b3 Copyright (c) 2000-2012 the FFmpeg developers
  built on Sep 26 2012 09:07:15 with gcc 4.6.1 (Ubuntu/Linaro 4.6.1-9ubuntu3)
  configuration: --enable-gpl --enable-libfaac --enable-libass --enable-libfdk-aac --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-librtmp --enable-libtheora --enable-libvorbis --enable-libvpx --enable-x11grab --enable-libx264 --enable-nonfree --enable-version3
  libavutil      51. 73.101 / 51. 73.101
  libavcodec     54. 59.100 / 54. 59.100
  libavformat    54. 28.101 / 54. 28.101
  libavdevice    54.  2.101 / 54.  2.101
  libavfilter     3. 17.100 /  3. 17.100
  libswscale      2.  1.101 /  2.  1.101
  libswresample   0. 15.100 /  0. 15.100
  libpostproc    52.  0.100 / 52.  0.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'sintel-2048-surround.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    creation_time   : 1970-01-01 00:00:00
    title           : Sintel
    encoder         : Lavf52.78.5
    copyright       : (c) copyright Blender Foundation | durian.blender.org
    description     : Sintel open movie project
  Duration: 00:14:48.06, start: 0.000000, bitrate: 2798 kb/s
    Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 2048x872 [SAR 1:1 DAR 256:109], 2352 kb/s, 24 fps, 24 tbr, 24 tbn, 48 tbc
    Metadata:
      creation_time   : 1970-01-01 00:00:00
      handler_name    : VideoHandler
    Stream #0:1(eng): Audio: aac (mp4a / 0x6134706D), 48000 Hz, 5.1, s16, 440 kb/s
    Metadata:
      creation_time   : 1970-01-01 00:00:00
      handler_name    : SoundHandler
File 'sintel-720-h264-ffmpeg.mp4' already exists. Overwrite ? [y/N] y
height not divisible by 2 (720x307)
Output #0, mp4, to 'sintel-720-h264-ffmpeg.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    description     : Sintel open movie project
    title           : Sintel
    encoder         : Lavf52.78.5
    copyright       : (c) copyright Blender Foundation | durian.blender.org
    Stream #0:0(und): Video: h264, yuv420p, 720x307 [SAR 4912:4905 DAR 256:109], q=-1--1, 90k tbn, 24 tbc
    Metadata:
      creation_time   : 1970-01-01 00:00:00
      handler_name    : VideoHandler
    Stream #0:1(eng): Audio: none, 48000 Hz, 5.1, s16, 128 kb/s
    Metadata:
      creation_time   : 1970-01-01 00:00:00
      handler_name    : SoundHandler
Stream mapping:
  Stream #0:0 -> #0:0 (h264 -> libx264)
  Stream #0:1 -> #0:1 (aac -> libfaac)
Error while opening encoder for output stream #0:0 - maybe incorrect parameters such as bit_rate, rate, width or height