webcam

I have been trying to create a simple program with Python which uses OpenCV to get a video feed from my webcam and display it on the screen. I know I am partly there because the window is created and the light on my webcam flicks on, but it just doesn't seem to show anything in the window. Hopefully someone can explain what I'm doing wrong. import cv cv.NamedWindow("w1", cv.CV_WINDOW_AUTOSIZE) capture = cv.CaptureFromCAM(0) def repeat(): frame = cv.QueryFrame(capture) cv.ShowImage("w1", frame) while True: repeat() On an unrelated note, I have noticed that my webcam sometimes changes its index

So all I need is simple - a list of currently avaliable video capture devices (web cameras). I need it in simple C or C++ console app. By list I mean something like such console output: 1) Asus Web Camera 2) Sony Web Camera So It seems simple but I have one requirement - use of native OS apis as much as possible - no external libs - after all - all we want is to print out a a list - not to fly onto the moon!) How to do such thing? also from this series: How to get a list of video capture devices on linux? and special details on getting cameras NAMES with correct, tested answers How to get a

In my C/C++ program, I'm using OpenCV to capture images from my webcam. The camera ( Logitech QuickCam IM ) can capture at resolutions 320x240 , 640x480 and 1280x960 . But, for some strange reason, OpenCV gives me images of resolution 320x240 only. Calls to change the resolution using cvSetCaptureProperty() with other resolution values just don't work. How do I capture images with the other resolutions possible with my webcam? Grifo I'm using openCV 1.1pre1 under Windows (videoinput library is used by default by this version of openCv under windows). With these instructions I can set camera