ffmpeg version N-35110-g0b9a69f, Copyright (c) 2000-2011 the FFmpeg developers
  built on Nov 23 2011 12:55:01 with gcc 4.6.2
  configuration: --prefix=/usr --enable-libmp3lame --enable-libvorbis --enable-libxvid --enable-libx264 --enable-libvpx --enable-libtheora --enable-libgsm --enable-libspeex --enable-postproc --enable-shared --enable-x11grab --enable-libopencore_amrnb --enable-libopencore_amrwb --enable-libschroedinger --enable-libopenjpeg --enable-librtmp --enable-gpl --enable-version3 --enable-runtime-cpudetect --disable-debug --disable-static
  libavutil    51. 26. 0 / 51. 26. 0
  libavcodec   53. 37. 0 / 53. 37. 0
  libavformat  53. 21. 0 / 53. 21. 0
  libavdevice  53.  4. 0 / 53.  4. 0
  libavfilter   2. 49. 0 /  2. 49. 0
  libswscale    2.  1. 0 /  2.  1. 0
  libpostproc  51.  2. 0 / 51.  2. 0
[x11grab @ 0x1d29a20] device: :0.0 -> display: :0.0 x: 0 y: 0 width: 1920 height: 1080
[x11grab @ 0x1d29a20] shared memory extension found
X Error of failed request:  BadMatch (invalid parameter attributes)
  Major opcode of failed request:  147 (MIT-SHM)
  Minor opcode of failed request:  4 (X_ShmGetImage)
  Serial number of failed request:  11
  Current serial number in output stream:  11