[FFmpeg-user] How can I modify this command so that it works?

[maujhsn]

maujhsn209-desktop:~$ ffmpeg -f oss -i /dev/dsp -f video4linux2 -i
/dev/video0 /tmp/out.mpg
FFmpeg version SVN-r0.5.9-4:0.5.9-0ubuntu0.10.04.2, Copyright (c) 2000-2009
Fabrice Bellard, et al.
  configuration: --extra-version=4:0.5.9-0ubuntu0.10.04.2 --prefix=/usr
--enable-avfilter --enable-avfilter-lavf --enable-vdpau --enable-bzlib
--enable-libgsm --enable-libschroedinger --enable-libspeex
--enable-libtheora --enable-libvorbis --enable-pthreads --enable-zlib
--disable-stripping --disable-vhook --enable-runtime-cpudetect --enable-gpl
--enable-postproc --enable-swscale --enable-x11grab --enable-libdc1394
--enable-shared --disable-static
  libavutil     49.15. 0 / 49.15. 0
  libavcodec    52.20. 1 / 52.20. 1
  libavformat   52.31. 0 / 52.31. 0
  libavdevice   52. 1. 0 / 52. 1. 0
  libavfilter    0. 4. 0 /  0. 4. 0
  libswscale     0. 7. 1 /  0. 7. 1
  libpostproc   51. 2. 0 / 51. 2. 0
  built on Dec 18 2012 18:02:54, gcc: 4.4.3
Input #0, oss, from '/dev/dsp':
  Duration: N/A, start: 1357708250.973816, bitrate: N/A
    Stream #0.0: Audio: pcm_s16le, 44100 Hz, mono, s16, 705 kb/s
[video4linux2 @ 0x93ea7d0]Wrong size (0x0)
/dev/video0: Error while opening file
maujhsn209 at maujhsn209-desktop:~$