[prev in list] [next in list] [prev in thread] [next in thread] 

List:       mjpeg-users
Subject:    Re: [Mjpeg-users] lavrec: setting gain/offset for captured video
From:       Martin Samuelsson <sam () home ! se>
Date:       2011-01-30 21:54:43
Message-ID: 20110130225443.263e5052 () kvantarell
[Download RAW message or body]

On Fri, 28 Jan 2011 10:25:36 +0100
Primoz PETERLIN <primozz.peterlin@gmail.com> wrote:

> Thank you for your reply. v4lctl from the xawtv package indeed seems
> to be the tool I need, although I haven't quite mastered it yet.  I
> can see the values in "v4lctl list" changed after I issue "v4lctl
> bright" or "v4lctl contrast" command, but the video signal captured by
> lavrec seems unaffected by it.

Curious. I think it should work fine.

I don't have any Zoran card running at the moment, and can't experiment with it.

Regards,
/Martin

> 
> All the best,
> Primož
> 
> 2011/1/24 Martin Samuelsson <sam@home.se>:
> > On Mon, 24 Jan 2011 14:39:48 +0100
> > Primoz PETERLIN <primozz.peterlin@gmail.com> wrote:
> >
> >> Hello everybody,
> >>
> >> Once again, I need to digitize some old tapes, so I reactivated my
> >> trusty mjpeg-tools. :)
> >>
> >> However, I noticed some of the tapes come out rather washed out when
> >> digitized, i.e., white is almost saturated, and it is difficult to
> >> discern any details (my tapes originate from a phase-contrast
> >> microscope, so they are grayscale to start with).  Do the Zoran-type
> >> cards (I am using DC30) allow any software control over gain and/or
> >> offset?  Is there any user-level possibility to change these settings?
> >
> > v4lctl may be what you're looking for, and specifically its bright and contrast commands.
> >
> > Regards,
> > /Martin
> >
> >>
> >> Thank you in advance,
> >> Primož
> >>
> >> --
> >> Primož Peterlin,   Inštitut za biofiziko, Med. fakulteta, Univerza v Ljubljani
> >> Lipičeva 2, SI-1000 Ljubljana, Slovenija.        primoz.peterlin@mf.uni-lj.si
> >> Tel +386-1-5437612, fax +386-1-4315127,  http://biofiz.mf.uni-lj.si/~peterlin/
> >> F8021D69 OpenPGP fingerprint: CB 6F F1 EE D9 67 E0 2F  0B 59 AF 0D 79 56 19 0F
> >>
> >> ------------------------------------------------------------------------------
> >> Special Offer-- Download ArcSight Logger for FREE (a $49 USD value)!
> >> Finally, a world-class log management solution at an even better price-free!
> >> Download using promo code Free_Logger_4_Dev2Dev. Offer expires
> >> February 28th, so secure your free ArcSight Logger TODAY!
> >> http://p.sf.net/sfu/arcsight-sfd2d
> >> _______________________________________________
> >> Mjpeg-users mailing list
> >> Mjpeg-users@lists.sourceforge.net
> >> https://lists.sourceforge.net/lists/listinfo/mjpeg-users
> >
> > ------------------------------------------------------------------------------
> > Special Offer-- Download ArcSight Logger for FREE (a $49 USD value)!
> > Finally, a world-class log management solution at an even better price-free!
> > Download using promo code Free_Logger_4_Dev2Dev. Offer expires
> > February 28th, so secure your free ArcSight Logger TODAY!
> > http://p.sf.net/sfu/arcsight-sfd2d
> > _______________________________________________
> > Mjpeg-users mailing list
> > Mjpeg-users@lists.sourceforge.net
> > https://lists.sourceforge.net/lists/listinfo/mjpeg-users
> >
> 
> 
> 
> -- 
> Primož Peterlin,   Inštitut za biofiziko, Med. fakulteta, Univerza v Ljubljani
> Lipičeva 2, SI-1000 Ljubljana, Slovenija.        primoz.peterlin@mf.uni-lj.si
> Tel +386-1-5437612, fax +386-1-4315127,  http://biofiz.mf.uni-lj.si/~peterlin/
> F8021D69 OpenPGP fingerprint: CB 6F F1 EE D9 67 E0 2F  0B 59 AF 0D 79 56 19 0F
> 
> ------------------------------------------------------------------------------
> Special Offer-- Download ArcSight Logger for FREE (a $49 USD value)!
> Finally, a world-class log management solution at an even better price-free!
> Download using promo code Free_Logger_4_Dev2Dev. Offer expires 
> February 28th, so secure your free ArcSight Logger TODAY! 
> http://p.sf.net/sfu/arcsight-sfd2d
> _______________________________________________
> Mjpeg-users mailing list
> Mjpeg-users@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/mjpeg-users

------------------------------------------------------------------------------
Special Offer-- Download ArcSight Logger for FREE (a $49 USD value)!
Finally, a world-class log management solution at an even better price-free!
Download using promo code Free_Logger_4_Dev2Dev. Offer expires 
February 28th, so secure your free ArcSight Logger TODAY! 
http://p.sf.net/sfu/arcsight-sfd2d
_______________________________________________
Mjpeg-users mailing list
Mjpeg-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/mjpeg-users

[prev in list] [next in list] [prev in thread] [next in thread]