[PD] controlling a webcam?
martinrp at vax2.concordia.ca
Thu Sep 29 17:46:39 CEST 2005
julieta Maria wrote:
>Hi, list! I have a question: I have to be able to
>control a the movement of web cam through internet. I
>was thinking to attach it to a couple of motors and
>control them through a serial port via a stamp... I
>would try to control the stamp sending values from PD
>(via the serial port)...
You could use a serial-to-servo controller like the minissc and skip the
stamp part, to control two servos from a serial port. If your webcam is
lightweight hobby servos work fine. Total cost < $150.
> And somehow send these values
>to PD from a web interface... Is this possible and/or
>the best/easier way to do it? Can I use the netreceive
>object for this, and what kind of objects/ software
>should I use to send this kind of data over the
>internet, what info would I need for that? I am
>practically new to networking...
perl or whatever that takes input from a web page and translates it to
serial data for the servo controller. You don't need pd for this at all.
Another approach is to run a pd patch instead of a web browser, that
talks over the net to a script/program on the camera machine. A
standalone programs included with pd called pdreceive can be used to
interface other programs/scripts with pd's netsend object. Programming
in c you could start with u_pdreceive.c to make a program to accept
specific commands from a pdsend object in a remote pd patch and
communicate with the servo controller ... otherwise have pdreceive pipe
to a script/program that does the command parsing and serial port bit.
Or you could use pd at both ends of the connection, but there is no
serial object for non-unix pd it seems.
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