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.
All the best, Primož 2011/1/24 Martin Samuelsson <s...@home.se>: > On Mon, 24 Jan 2011 14:39:48 +0100 > Primoz PETERLIN <primozz.peter...@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.peter...@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.peter...@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
