On 2010-08-24 21:51, Ricardo Brazileiro wrote:
hi all,
How can I use two webcam in Gem to tracking (pix_blob) ?
use 2 [pix_video] objects.
Is it possible?
yes.
I have two webcam, /dev/video0 and /dev/video1. I tested using pix_video but I only change the device in the same window.
the window has nothing to do with either the video grabbing nor the video analysis. you can grab video, run [pix_blob] on it and still only see a teapot :-)
anyhow: pix_blob will only ever work on single pixes ("frames"). if you want to use 2 cameras (e.g. to enlargen the viewing angle), you basically have 2 possibilities:
techniques you are easy with. a simple one would be to display both pixes (probably in a not-displayed [gemframebuffer]), and use [pix_snap] to grab the composited image). then run whatever analysis you want on the new big pix.
gfmasdr IOhannes