[gentoo-user] high priority task as user (nice/ionice)

[meino.cramer@gmx.de]

Hi,

with guvcview I capture video streams of some birds, which
sometime arrive on the roof.
When they do I press the record button of the guvcview application.

The webcam I use is able to deliver 30fps at 640x320 pixel with audio 
via usb.
Unfortunately while recording nothing else should use the CPU/the IO
system heavily otherwise I will get an vi-vi-ddd-d----d-deooo-o--o-o
(stuttering performance).

In this list I read about ionice and nice, which latter I know before.
Form the manpages of both I read, that only root is allowed to give
process higher priority than normal.
I want to give guvcview high IO- and CPU-priority without the hassle
to pickup PIDs and lunch nice/ionice by root-hand after the start of 
guvcview (user-process).

And I am iusing icewm (no KDE/GNOME as desktop)

Is there any chance to start guvcview with user rights AND to give the
application higer priorities so that whatever guvcview wants from the
system will be served as soon as possible to avoid stuttering videos?

Thank you very much in advance for any help!

Have a nice sunday!
mcc

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