linux-kernel - Re: cafe_ccic: possible reason why gqcam is not working

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Message-ID: <20081023085533.6828ee0b@bike.lwn.net>
Date:	Thu, 23 Oct 2008 08:55:33 -0600
From:	Jonathan Corbet <corbet@....net>
To:	Németh Márton <nm127@...email.hu>
Cc:	video4linux-list@...hat.com, LKML <linux-kernel@...r.kernel.org>
Subject: Re: cafe_ccic: possible reason why gqcam is not working

On Thu, 23 Oct 2008 11:17:39 +0200
Németh Márton <nm127@...email.hu> wrote:

>  - gqcam currently only supports video4linux 1, and it uses the
> following ioctls: VIDIOCSPICT, VIDIOCSWIN, VIDIOCGCAP, VIDIOCGWIN and
> VIDIOCGPICT.

...and that, of course, is the problem.  The V4L1 emulation in the
kernel cannot do a perfect job of things.  This application really
needs to be dragged forward to V4L2 if it is to work well with
contemporary video drivers.

Thanks,

jon
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