[FFmpeg-user] web cam issue.

[Luca Della Ghezza]

Hi to all and happy new year.
I have a linux box with Ubuntu 10.04 (AMD64), kernel 2.6.32-37.
I recently installed latest version of ffmpeg from git, because I'm
trying to compile ffdiaporama suite. Apart from this I'm trying to use
ffserver and ffmpeg to stream my webcam. 
ffserver starts with no problems, but ffmpeg isn't able to access my web
cam

luca at pc-cuarto:~$ ffmpeg -i /dev/video1 http://localhost:8090/feed1.ffm
ffmpeg version N-36211-g5764301, Copyright (c) 2000-2011 the FFmpeg
developers
  built on Dec 27 2011 09:58:18 with gcc 4.4.3
  configuration: --enable-libmp3lame --enable-libxvid --enable-libvorbis
--enable-gpl --enable-libfaac --enable-libtheora --enable-zlib
--disable-shared --enable-libx264 --enable-libdirac --enable-nonfree
--enable-version3 --enable-libschroedinger --enable-avfilter
--enable-libspeex --enable-libopenjpeg --enable-libgsm --enable-postproc
--enable-pthreads --enable-libopencore-amrnb --enable-libopencore-amrwb
--enable-ffplay --enable-pthreads --prefix=/usr/local --enable-x11grab
--enable-runtime-cpudetect --enable-bzlib --enable-libdc1394
--enable-libvpx
  libavutil      51. 33.100 / 51. 33.100
  libavcodec     53. 48.100 / 53. 48.100
  libavformat    53. 28.100 / 53. 28.100
  libavdevice    53.  4.100 / 53.  4.100
  libavfilter     2. 54.100 /  2. 54.100
  libswscale      2.  1.100 /  2.  1.100
  libswresample   0.  5.100 /  0.  5.100
  libpostproc    51.  2.100 / 51.  2.100
/dev/video1: Invalid data found when processing input
luca at pc-cuarto:~$ 

After the error appears on terminal, I find this line in dmesg:

[23958.647431] zc3xx: probe 2wr ov vga 0x0000


Note that my web cam is normally working with a plenty of software like:
skype, motion, amsn, cheese, uvcwiev, etc.

Can somebody help me?
Thx a lot.

Luca