[PD] philips 680 webcam and pdp

chris clepper cgc at humboldtblvd.com
Sat Aug 23 20:13:37 CEST 2003

>hi list
>finally after some nice kernelcompiling my usbwebcam is working.
>at least in camstream i recieve the images i want.
>but if i use the cam with pdp the xv-window is splitted into
>two parts a green and a dark green one, no images are visible.
>but there are no errors on  the printout.

i don't work on pdp, but i think i know what the problem is.  you are 
most likely seeing an improper display of yuv color-space in an rgb 
display.  pdp might have a color-space conversion object that would 
convert yuv to rgb and vice versa.  a potential source of the problem 
you are seeing is the webcam reporting the wrong color space or pdp 
not detecting the right one to use.  i don't really know a whole lot 
about v4l, but i seem to recall it supporting several color-spaces 
for capture devices.


>what could this be?
>thx marc
>pdp_v4l: opening /dev/video
>pdp_v4l: cap: name Philips 680 webcam type 1 channels 1 maxw 640 
>maxh 480 minw 128 minh 96
>pdp_v4l: picture: brightness 32768 depth 24 palette 15
>pdp_v4l: channel 0 name Webcam type 2 flags 0
>pdp_v4l: switched to channel 0
>pdp_v4l: buffer size 921600, frames 2, offset 0 460800
>pdp_v4l: using VIDEO_PALETTE_YUV420P
>pdp_v4l: frame 0 0, format 15, width 320, height 240
>pdp_v4l: Opened video connection (320x240)
>pdp_v4l: detected pwc
>watchdog: signaling pd...
>pdp_v4l: camera framerate set to 27 fps
>pdp_ctrack : reallocated buffers
>pdp_xv: autocreate window
>pdp_xvideo: grabbed port 103 on adaptor 0
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