Date: Tue, 23 Sep 1997 12:51:29 -0700 (PDT) From: Alex Belits <abelits@phobos.illtel.denver.co.us> To: Alfred Perlstein <perlsta@cs.sunyit.edu> Cc: hackers@FreeBSD.ORG Subject: Re: quickcam? Message-ID: <Pine.LNX.3.95.970923115335.31989C-100000@phobos.illtel.denver.co.us> In-Reply-To: <Pine.BSF.3.96.970923144707.355A-100000@server.local.sunyit.edu>
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On Tue, 23 Sep 1997, Alfred Perlstein wrote: > > currently use it to take 1 fps "video" from color quickcam. > > hmmm, how many input formats does it support and at what speeds? color quickcam "millions of colors" (24bpp) mode, b&w quickcam 4bpp and 6bpp with unidirectional or bidirectional parallel port, reduced image size, 1/2 and 1/4 resolutions are supported in all modes. Color quickcam "billions of colors" (pseudo-double resolution) mode isn't supported (working on it), "thousands of colors" compressed mode isn't supported (Connectix doesn't provide documentation or libraries) and bidirectional ports, configured to pretend to be unidirectional confuse the autodetection. Frame rate is 0.8-1 fps in color mode 320x240 or 3-4 fps in 6bpp b&w mode, it's hardware limitation of the camera intrface. Long exposure values cause frame rate to decrease further. Program takes a lot of processor time while grabbing the image, so lower frame rates may be more reasonable. -- Alex
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