ffmpeg -i http://localhost:8000/event1.ogv -f ffm http://127.0.0.1:8090/feed1.ffm
ffmpeg version git-2013-03-09-22cc8a1 Copyright (c) 2000-2013 the FFmpeg developers
  built on Mar  9 2013 19:38:35 with gcc 4.4.5 (Debian 4.4.5-8)
  configuration: --enable-gpl --enable-libass --enable-libfaac --enable-libfdk-aac --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libspeex --enable-librtmp --enable-libtheora --enable-libvorbis --enable-libvpx --enable-x11grab --enable-libx264 --enable-nonfree --enable-version3
  libavutil      52. 19.100 / 52. 19.100
  libavcodec     54. 92.100 / 54. 92.100
  libavformat    54. 63.104 / 54. 63.104
  libavdevice    54.  3.103 / 54.  3.103
  libavfilter     3. 42.103 /  3. 42.103
  libswscale      2.  2.100 /  2.  2.100
  libswresample   0. 17.102 /  0. 17.102
  libpostproc    52.  2.100 / 52.  2.100
[theora @ 0x340df80] 7 bits left in packet 82
[ogg @ 0x3409f20] Estimating duration from bitrate, this may be inaccurate
Input #0, ogg, from 'http://localhost:8000/event1.ogv':
  Duration: N/A, start: 0.000000, bitrate: N/A
    Stream #0:0: Video: theora, yuv420p, 320x240, 30 tbr, 30 tbn, 30 tbc
Mon Mar 11 17:23:34 2013 127.0.0.1 - - [GET] "/feed1.ffm HTTP/1.1" 200 4175
Missing audio stream which is required by this ffm