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Date:      Thu, 20 Mar 2008 17:51:15 +0100
From:      usleepless@gmail.com
To:        "Luigi Rizzo" <rizzo@iet.unipi.it>
Cc:        Julian Elischer <julian@elischer.org>, multimedia@freebsd.org
Subject:   Re: webcam video capture
Message-ID:  <c39ec84c0803200951s3fb8fbf1kd4e15f95836ca3a9@mail.gmail.com>
In-Reply-To: <20080320082100.GA5947@onelab2.iet.unipi.it>
References:  <47E20F35.4060102@elischer.org> <20080320082100.GA5947@onelab2.iet.unipi.it>

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On Thu, Mar 20, 2008 at 9:21 AM, Luigi Rizzo <rizzo@iet.unipi.it> wrote:
> On Thu, Mar 20, 2008 at 12:16:05AM -0700, Julian Elischer wrote:
>  > does anyone have anything that can capture video
>  > from the webcams that we have support for?
>  >
>  > I have been able to get still shots but I would like to be able to
>  > write a stream to a file..
>  >
>  >
>  > I could do it with firewire, but I need to do it with cheap
>  > hardware..
>
>  if you look at the pwcview application that is in the linux-kmod-compat
>  or linux-kmod-gspca, that one has support for writing raw or jpg
>  frames to disk. The source code is small and relatively simple
>  to modif, and it can run in headless mode.
>
>  Note though that for many of the webcams, the gspca driver does not
>  have good support for controlling brightness or contrast, which
>  basically means that outdoor pictures tend to come coimpletely
>  white.

i observed the same with my Pixart-chipset webcam, and have patches
for this problem.

i will try to get the patches applied upstream ( still messing about
with the agc ). if anyone is interested right now, make yourself
heard.

regards,

usleep



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