added support to set web cam resolution

[kartik-nighania]

No description provided.

[wb666greene]

I like the idea, but webcams are all over the map in terms of what resolutions they will accept. Doing the set() doesn't mean the resolution has changed to what you requested or that it even changed at all. This needs to be followed with a get() to verify if the new resolution really happened or not.

Then the question becomes how to best deal with not getting the requested resolution.

[jcRisch]

You missed a coma between name="WebcamVideoStream" and resolution=(640, 480) .
Otherwise everything is ok for me !

[psodaz]

approve

[atakli]

I have done the same modifications but when I change the resolution to (a,b) for a webcam, it becomes (a/2,b/2). What is the possible reason for this?
I'm using Python 3.5
Thanks

[njern]

Any plans to merge this?

[cengiz7]

Somebody update this pr please :D

[jrosebr1]

I think a better, long-term solution would be for the src to accept two types of values:

1. An integer, like it currently does (i.e., the index of the webcam)
2. Or, an already instantiated cv2.VideoCapture object

In the constructor we can check to see if it's an integer, and if so, instantiate our own cv2.VideoCapture.

Otherwise, we can instantiate our cv2.VideoCapture object in the driver script, use the .set method to set any parameters (such as resolution), and then pass it as the src.

That way we can:

• Still leverage threaded streams
• Be able to set whatever parameters we like
• And not have it break existing code

[makew0rld]

#177 is a newer PR that does a similar thing. I can confirm it works.