how to close 1 channel when it finish to record

#1
hi, because i use a octa-tuner dvb-t2 card, i have
sometimes also 6-10 channels open on the screen
because i schedule recording for 24 hours.
but 10 channels that work (record or view) at the
same time on the screen take a big work on the cpu.
so, i ask:
if 1 channel or more have finish to record (the record scheduled),
how i can close them in the program, but of course i want
that the other channels continue to record (what was scheduled).
of course:
if i'm at home i stop channels when i want,
but if i'm outside house ???
thank very much.