FW: still image capture from video stream

stan stanb at panix.com
Wed Oct 22 04:22:35 PDT 2003

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 at 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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