Date: Wed, 22 Oct 2003 07:22:32 -0400 From: stan <stanb@panix.com> To: freebsd-multimedia@freebsd.org Subject: Re: FW: still image capture from video stream Message-ID: <20031022112232.GA12252@teddy.fas.com> In-Reply-To: <20031022074854.0aae52e3.steve@sohara.org> References: <20031021193549.GC21626@teddy.fas.com> <20031022074854.0aae52e3.steve@sohara.org>
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On Wed, Oct 22, 2003 at 07:48:54AM +0200, Steve O'Hara-Smith wrote: > On Tue, 21 Oct 2003 15:35:49 -0400 > stan <stanb@panix.com> wrote: > > S> I'm thinking I can do this with a video capture borad, right? Which > S> ones are well supported under FreeBSD? I don't need ultra high > > Almost any BT8[47][89] based card, and almost nothing else. > > There's a very simple program to capture a jpeg from the bktr > interface called bktr2jpeg that should do the job - a search should find > the code quickly enough (it's a single C file very simple code, the > meteor man page has enough information to rewrite it). Thanks, that sounds usefule. I'll search for it. > > You could also set ffmpeg to run at 4 frames per second and emit > an MJPEG, AVI or MPEG stream. Did I mention that there were 4 different cameras? I'm either goging to have to use 4 cards, or something like the Inpact series of cards. Is switiching between the sources supported? How quick can U switch? > > S> resolutin, as a matter of fact, gien the number of images that I'll be > S> accumulating (4/per second * 60 seconds * 60 minutes * 24 hours * > S> number of days I need to keep) small image size is very important. > > You can set that down to quarter resolution (160x120 for NTSC). That will help. > > S> So, how about some pointers to docs on this? And some advice on > S> hardware would be welcome also. > > man bktr > man meteor > Thanks for the feedback! -- "They that would give up essential liberty for temporary safety deserve neither liberty nor safety." -- Benjamin Franklin
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