olson@boxen ~/Desktop $ ffmpeg -f alsa -ac 2 -i hw:1,0 -f x11grab -r 20 -s 1920x1080 -i :0.0 -acodec pcm_s16le -vcodec libx264  -preset ultrafast -threads 2 output.avi
ffmpeg version N-35096-g7fd467f Copyright (c) 2000-2012 the FFmpeg developers
  built on Aug 10 2012 21:40:03 with gcc 4.6 (Ubuntu/Linaro 4.6.3-1ubuntu5)
  configuration: --enable-gpl --enable-libfaac --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-librtmp --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libx264 --enable-nonfree --enable-version3 --enable-x11grab
  libavutil      51. 67.100 / 51. 67.100
  libavcodec     54. 51.100 / 54. 51.100
  libavformat    54. 23.100 / 54. 23.100
  libavdevice    54.  2.100 / 54.  2.100
  libavfilter     3.  7.100 /  3.  7.100
  libswscale      2.  1.101 /  2.  1.101
  libswresample   0. 15.100 /  0. 15.100
  libpostproc    52.  0.100 / 52.  0.100
[alsa @ 0x2c7f340] Estimating duration from bitrate, this may be inaccurate
Guessed Channel Layout for  Input Stream #0.0 : stereo
Input #0, alsa, from 'hw:1,0':
  Duration: N/A, start: 1344966203.969562, bitrate: 1536 kb/s
    Stream #0:0: Audio: pcm_s16le, 48000 Hz, stereo, s16, 1536 kb/s
[x11grab @ 0x2c80100] device: :0.0 -> display: :0.0 x: 0 y: 0 width: 1920 height: 1080
[x11grab @ 0x2c80100] shared memory extension found
[x11grab @ 0x2c80100] Estimating duration from bitrate, this may be inaccurate
Input #1, x11grab, from ':0.0':
  Duration: N/A, start: 1344966204.023852, bitrate: 1327104 kb/s
    Stream #1:0: Video: rawvideo (BGR[0] / 0x524742), bgr0, 1920x1080, 1327104 kb/s, 20 tbr, 1000k tbn, 20 tbc
[libx264 @ 0x2c84d20] using cpu capabilities: MMX2 SSE2Fast FastShuffle SSEMisalign LZCNT
[libx264 @ 0x2c84d20] profile High 4:4:4 Predictive, level 4.0, 4:4:4 8-bit
Output #0, avi, to 'output.avi':
  Metadata:
    ISFT            : Lavf54.23.100
    Stream #0:0: Video: h264 (H264 / 0x34363248), yuv444p, 1920x1080, q=-1--1, 20 tbn, 20 tbc
    Stream #0:1: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 48000 Hz, stereo, s16, 1536 kb/s
Stream mapping:
  Stream #1:0 -> #0:0 (rawvideo -> libx264)
  Stream #0:0 -> #0:1 (pcm_s16le -> pcm_s16le)
Press [q] to stop, [?] for help
frame=  245 fps=7.4 q=-1.0 Lsize=    9577kB time=00:00:12.25 bitrate=6404.6kbits/s
video:2758kB audio:6189kB subtitle:0 global headers:0kB muxing overhead 7.034805%
[libx264 @ 0x2c84d20] frame I:1     Avg QP:20.00  size:344835
[libx264 @ 0x2c84d20] frame P:244   Avg QP:12.70  size: 10163
[libx264 @ 0x2c84d20] mb I  I16..4: 100.0%  0.0%  0.0%
[libx264 @ 0x2c84d20] mb P  I16..4:  1.4%  0.0%  0.0%  P16..4:  9.9%  0.0%  0.0%  0.0%  0.0%    skip:88.6%
[libx264 @ 0x2c84d20] coded y,u,v intra: 17.6% 7.6% 7.1% inter: 3.4% 0.8% 0.8%
[libx264 @ 0x2c84d20] i16 v,h,dc,p: 54% 29%  6% 12%
[libx264 @ 0x2c84d20] kb/s:1844.70
olson@boxen ~/Desktop $