$ ffmpeg -f video4linux2 -vcodec h264 -i /dev/video1 -vcodec copy -f mp4 test.mp4
ffmpeg version N-39863-gc4ce870 Copyright (c) 2000-2012 the FFmpeg developers
  built on Apr 17 2012 05:45:58 with gcc 4.6.3
  configuration: --enable-vdpau --enable-bzlib --enable-libgsm --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libvorbis --enable-pthreads --enable-zlib --enable-libvpx --enable-runtime-cpudetect --enable-libfreetype --enable-vaapi --enable-frei0r --enable-libopenjpeg --enable-gpl --enable-postproc --enable-x11grab --enable-libmp3lame --enable-librtmp --enable-libv4l2 --enable-libx264 --enable-libopencore-amrnb --enable-version3 --enable-libopencore-amrwb --enable-version3 --enable-version3 --enable-version3 --shlibdir=/usr/lib/i386-linux-gnu/i686/cmov --cpu=i686 --enable-shared
  libavutil      51. 46.100 / 51. 46.100
  libavcodec     54. 14.101 / 54. 14.101
  libavformat    54.  3.100 / 54.  3.100
  libavdevice    53.  4.100 / 53.  4.100
  libavfilter     2. 70.100 /  2. 70.100
  libswscale      2.  1.100 /  2.  1.100
  libswresample   0. 11.100 /  0. 11.100
  libpostproc    52.  0.100 / 52.  0.100
[video4linux2,v4l2 @ 0x83e1620] Cannot find a proper format for codec_id 28, pix_fmt -1.
/dev/video1: Input/output error