fast one

ffmpeg version 0.7.12, Copyright (c) 2000-2011 the FFmpeg developers
  built on Apr 11 2012 07:40:07 with gcc 4.4.5
  configuration: --enable-libdc1394 --prefix=/usr --extra-cflags='-Wall -g ' --cc='ccache cc' --enable-shared --enable-libmp3lame --enable-gpl --enable-libvorbis --enable-pthreads --enable-libfaac --enable-libxvid --enable-postproc --enable-x11grab --enable-libgsm --enable-libtheora --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libx264 --enable-libspeex --enable-nonfree --disable-stripping --enable-avfilter --enable-libdirac --disable-decoder=libdirac --enable-libfreetype --enable-libschroedinger --disable-encoder=libschroedinger --enable-version3 --enable-libopenjpeg --enable-libvpx --enable-librtmp --extra-libs=-lgcrypt --disable-altivec --disable-armv5te --disable-armv6 --disable-vis
  libavutil    50. 43. 0 / 50. 43. 0
  libavcodec   52.123. 0 / 52.123. 0
  libavformat  52.111. 0 / 52.111. 0
  libavdevice  52.  5. 0 / 52.  5. 0
  libavfilter   1. 80. 0 /  1. 80. 0
  libswscale    0. 14. 1 /  0. 14. 1
  libpostproc  51.  2. 0 / 51.  2. 0
[x11grab @ 0x1de72e0] device: :0.0 -> display: :0.0 x: 0 y: 0 width: 1024 height: 768
[x11grab @ 0x1de72e0] shared memory extension found
[x11grab @ 0x1de72e0] Estimating duration from bitrate, this may be inaccurate
Input #0, x11grab, from ':0.0':
  Duration: N/A, start: 1338221380.501348, bitrate: 377110 kb/s
    Stream #0.0: Video: rawvideo, rgb565le, 1024x768, 377110 kb/s, 29.97 tbr, 1000k tbn, 29.97 tbc
Incompatible pixel format 'rgb565le' for codec 'libvpx', auto-selecting format 'yuv420p'
[buffer @ 0x1df5260] w:1024 h:768 pixfmt:rgb565le tb:1/1000000 sar:0/1 sws_param:
[buffersink @ 0x1ddffe0] auto-inserting filter 'auto-inserted scaler 0' between the filter 'src' and the filter 'out'
[scale @ 0x1de11a0] w:1024 h:768 fmt:rgb565le -> w:1024 h:768 fmt:yuv420p flags:0x4
[libvpx @ 0x1de4300] v0.9.7-p1
Output #0, webm, to 'test.webm':
  Metadata:
    encoder         : Lavf52.111.0
    Stream #0.0: Video: libvpx, yuv420p, 1024x768, q=2-31, 200 kb/s, 1k tbn, 15 tbc
Stream mapping:
  Stream #0.0 -> #0.0
Press [q] to stop, [?] for help
frame=   29 fps= 12 q=0.0 Lsize=     105kB time=00:00:01.93 bitrate= 445.7kbits/s dup=0 drop=26
video:104kB audio:0kB global headers:0kB muxing overhead 0.687211%