erlendr@pc4038:~$ ffmpeg -f alsa -ac 2 -i pulse -f x11grab -s 1680x1050 -r 25 -i :0.0+0,0 -vcodec libtheora -pix_fmt yuv420p -vf yadif,scale=1280:720 -r 20 -acodec libvorbis -ab 160000 -g 30 -threads 0 -f mpegts /tmp/fifo1 | vlc -I dummy /tmp/fifo1 --sout '#std{access=http,mux=ts,dst=:8080}'
VLC media player 1.0.6 Goldeneye
ffmpeg version git-2012-05-23-0da28d6 Copyright (c) 2000-2012 the FFmpeg developers
  built on May 23 2012 16:04:42 with gcc 4.4.3
  configuration: --enable-gpl --enable-libfaac --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libx264 --enable-nonfree --enable-version3 --enable-x11grab
  libavutil      51. 53.100 / 51. 53.100
  libavcodec     54. 23.100 / 54. 23.100
  libavformat    54.  6.100 / 54.  6.100
  libavdevice    53.  4.100 / 53.  4.100
  libavfilter     2. 76.100 /  2. 76.100
  libswscale      2.  1.100 /  2.  1.100
  libswresample   0. 15.100 /  0. 15.100
  libpostproc    52.  0.100 / 52.  0.100
[alsa @ 0xa6cb440] Estimating duration from bitrate, this may be inaccurate
Guessed Channel Layout for  Input Stream #0.0 : stereo
Input #0, alsa, from 'pulse':
  Duration: N/A, start: 1338305925.929696, bitrate: 1536 kb/s
    Stream #0:0: Audio: pcm_s16le, 48000 Hz, stereo, s16, 1536 kb/s
[x11grab @ 0xa6c5940] device: :0.0+0,0 -> display: :0.0 x: 0 y: 0 width: 1680 height: 1050
[x11grab @ 0xa6c5940] shared memory extension found
[0x9513ac0] dummy interface: using the dummy interface module...
[x11grab @ 0xa6c5940] Estimating duration from bitrate, this may be inaccurate
Input #1, x11grab, from ':0.0+0,0':
  Duration: N/A, start: 1338305927.942839, bitrate: 1411200 kb/s
    Stream #1:0: Video: rawvideo (BGR[0] / 0x524742), bgr0, 1680x1050, 1411200 kb/s, 25 tbr, 1000k tbn, 25 tbc
File '/tmp/fifo1' already exists. Overwrite ? [y/N] [0x9530bd0] main access out: creating httpd
y
w:1680 h:1050 pixfmt:bgr0 tb:1/1000000 sar:0/1 sws_param:flags=2
[buffersink @ 0xa6cc200] No opaque field provided
[yadif @ 0xa6cc9c0] mode:0 parity:-1 auto_enable:0
[yadif @ 0xa6cc9c0] auto-inserting filter 'auto-inserted scaler 0' between the filter 'src' and the filter 'Parsed_yadif_0'
[scale @ 0xa6cd360] w:1680 h:1050 fmt:bgr0 sar:0/1 -> w:1680 h:1050 fmt:yuv444p10le sar:0/1 flags:0x4
[scale @ 0xa6cce60] w:1680 h:1050 fmt:yuv444p10le sar:0/1 -> w:1280 h:720 fmt:yuv420p sar:0/1 flags:0x4
[aformat @ 0xa79fb60] auto-inserting filter 'auto-inserted resampler 0' between the filter 'src' and the filter 'aformat'
[aresample @ 0xa7b7c20] r:48000Hz -> r:48000Hz
[mpegts @ 0xa6c3260] muxrate VBR, pcr every 2 pkts, sdt every 200, pat/pmt every 40 pkts
Output #0, mpegts, to '/tmp/fifo1':
  Metadata:
    encoder         : Lavf54.6.100
    Stream #0:0: Video: theora, yuv420p, 1280x720, q=2-31, 200 kb/s, 90k tbn, 20 tbc
    Stream #0:1: Audio: vorbis, 48000 Hz, stereo, flt, 160 kb/s
Stream mapping:
  Stream #1:0 -> #0:0 (rawvideo -> libtheora)
  Stream #0:0 -> #0:1 (pcm_s16le -> libvorbis)
Press [q] to stop, [?] for help
[libvorbis @ 0xa6c43c0] Que input is backward in time
libdvbpsi error (PSI decoder): TS discontinuity (received 4, expected 0) for PID 0
libdvbpsi error (PSI decoder): TS discontinuity (received 4, expected 0) for PID 4096
libdvbpsi error (PSI decoder): TS discontinuity (received 1, expected 0) for PID 17
[0x9528e48] main input error: ES_OUT_SET_(GROUP_)PCR  is called too late, increasing pts_delay to 338 ms
[0x9528e48] main input error: ES_OUT_RESET_PCR called
[0x9528e48] main input error: ES_OUT_SET_(GROUP_)PCR  is called too late, increasing pts_delay to 380 ms
[0x9528e48] main input error: ES_OUT_RESET_PCR called
frame=  549 fps= 21 q=0.0 Lsize=       0kB time=00:00:26.74 bitrate=   0.0kbits/s dup=518 drop=0
video:700kB audio:1kB global headers:7kB muxing overhead -100.000000%
^C[0x947f3f0] signals interface error: Caught Interrupt signal, exiting...