Command to encode:
==================

mplayer and mencoder first had to be compiled manually using the
/usr/local/mplayer/ prefix for it to support v4l, debian's default didn't.
Well, actually debian didn't provide mplayer/mencoder, so it was actually
previously a debian package provided by a third party, and it didn't do the
job.  Once recompiled and reinstalled manually using the proper build options,
it can work.  I also had to come out with this command out of trial and error
:)

/usr/local/mplayer/bin/mencoder -tv driver=v4l:input=0:adevice=/dev/dsp:audiorate=44100:norm=NTSC:width=320:height=240:chanlist=us-cable:outfmt=yv12:fps=30:channel=26 -ovc lavc -lavcopts vcodec=mpeg4:vbitrate=800:vhq:vqmax=31:keyint=300 -oac mp3lame -lameopts br=128:cbr -ffourcc divx -o output.avi -af volnorm -vf denoise3d -endpos <time> tv://


Program scheduling:
===================

We can use the at(1) command to schedule record times, and mencoder supports
an option to only encode from a source for the given time, using the -endpos
parameter.  atq(1) can list queued items, and atrm(1) can delete queued
items to be executed later.  This allows to build a pretty nice system, remains
to write some kind of frontend for it.