ffmpeg -f x11grab -s 1920x1200 -r 15 -i :0.0 -c:v libx264 -preset fast -pix_fmt yuv420p -s 1280x800 -threads 0 -f flv rtmp://live.twitch.tv/app/`cat ~/.twitch_key`
ffmpeg version 1.0.7 Copyright (c) 2000-2013 the FFmpeg developers
  built on Jul 22 2013 22:38:20 with gcc 4.8.1 (Gentoo 4.8.1 p1.0, pie-0.5.6)
  configuration: --prefix=/usr --libdir=/usr/lib64 --shlibdir=/usr/lib64 --mandir=/usr/share/man --enable-shared --cc=x86_64-pc-linux-gnu-gcc --cxx=x86_64-pc-linux-gnu-g++ --ar=x86_64-pc-linux-gnu-ar --optflags='-march=native -O2 -pipe -m64' --extra-cflags='-march=native -O2 -pipe -m64' --extra-cxxflags='-march=native -O2 -pipe -m64' --disable-static --enable-gpl --enable-version3 --enable-postproc --enable-avfilter --enable-avresample --disable-stripping --disable-debug --disable-doc --enable-openssl --enable-nonfree --enable-libmp3lame --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libtheora --enable-libx264 --enable-libxvid --enable-libaacplus --enable-nonfree --enable-libfaac --enable-nonfree --enable-libcdio --enable-openal --disable-indev=v4l2 --disable-indev=oss --disable-indev=jack --enable-x11grab --enable-libpulse --disable-outdev=oss --enable-libass --enable-libfreetype --enable-pthreads --enable-libopencore-amrwb --enable-libopencore-amrnb --enable-libgsm --enable-librtmp --enable-libschr  libavutil      51. 73.101 / 51. 73.101
  libavcodec     54. 59.100 / 54. 59.100
  libavformat    54. 29.104 / 54. 29.104
  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
[x11grab @ 0x69a4a0] device: :0.0 -> display: :0.0 x: 0 y: 0 width: 1920 height: 1200
[x11grab @ 0x69a4a0] shared memory extension found
[x11grab @ 0x69a4a0] Estimating duration from bitrate, this may be inaccurate
Input #0, x11grab, from ':0.0':
  Duration: N/A, start: 1374549905.901525, bitrate: 1105920 kb/s
    Stream #0:0: Video: rawvideo (BGR[0] / 0x524742), bgr0, 1920x1200, 1105920 kb/s, 15 tbr, 1000k tbn, 15 tbc
Segmentation fault