[PD] unable to open pdp_v4l webcam video stream

[Menno van der Woude]

Thanks that helped and made it work!

The latency with this webcam is amazingly long, as in a second or more.
Speeding up the [metro] is of no influence.

Any ideas for the best (web)cam for the goal I have?
Or is the delay due to settings inside pd?
Either ieee1394 or usb would be fine.
It would be nice to bring down response to changes in the sight of the
cam to about 50 ms.

Bye, Menno.

On Sat, Nov 20, 2010 at 7:58 PM, Pagano, Patrick
<pat at digitalworlds.ufl.edu> wrote:
> try pdp_v4l2
> ________________________________________
> From: pd-list-bounces at iem.at [pd-list-bounces at iem.at] On Behalf Of Menno van der Woude [mennowo at gmail.com]
> Sent: Saturday, November 20, 2010 12:33 PM
> To: pd-list
> Subject: [PD] unable to open pdp_v4l webcam video stream
>
> Hello,
>
> with the purpose of being able to track elements in sight of a cam by
> virtue of their color, I would like to use and explore the
> possibilities of pdp_ctrack. While this does work with prerecorded
> video (avi) i am unable to try it with live video, cause pdp_v4l gives
> and error. See below what happens when trying to send [open
> /dev/video0< to [pdp_v4l].
>
> pdp_v4l: opening /dev/video0
> pdp_v4l: cap: name UVC Camera (046d:0802) type 1 channels 1 maxw 640
> maxh 480 minw 48 minh 32
> pdp_v4l: picture: brightness 32896 depth 0 palette 0
> pdp_v4l: channel 0 name Camera 1 type 2 flags 0
> pdp_v4l: switched to channel 0
> pdp_v4l: cant change to norm 0
> error: pdp_v4l: no method for 'type'
>
> Does anyone know if this is a matter of buying a better cam? Now using
> a Logitech very simple usb webcam. Or do i need to load/install a
> certain driver, or send other messages to [pdp_v4l]?
> My purpose is to get coordinates (and possibly size) of colored
> elements. I want to be able to track different elements
> simultaneously, and be able to calculate distance. Maybe a combination
> with size would also allow me to calculate distance in 3 dimension.
> Then to use the data for conditional sounds (tonal and/or atonal).
> Any help appreciated!
>
> Bye, Menno.
>
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