I have a problem with camera resolution.
During runtime, my application must run with 320*240 camera resolution.
If a client user always uses 640*480 as his/her default camera resolution.
How should I change the camera resolution 640*480 into 320*240 by "in process"?

...I have no idea :-P

__________________
-Aaron

?? - This doesn't really sound like a C/C++ question. If it isn't you should try posting in the hardware forums here. If it is a C/C++ question could you clarify what you are looking for? Do you want to write a program that will reduce a 640x480 jpg to a 320x240 jpg?

Nah... someone else was doing some camera stuff awhile ago, and I'm pretty sure there's some code process that changes the camera recording resolution from 640*480 to 320*240.

__________________
-Aaron

Thanks dsmith!
Because I use C++ for my programming language. So this is a question
with C++ programming technique. However, the important thing is to clarify
my question. This is not a question with "reducing a 640x480 jpg to a 320x240 jpg?" Reducing a 640x480 jpg to a 320x240 jpg is a question on
"image processing". What I want to question is a "camera display resolution".
I recently created a program for education. During the initializing of my app,
the runtime envronment should be 320*240 resolution to display camera image. But if a user usually use 640*480 or other resolution not 320*240,
my app will not allow such envrinment to run and will be termated.
How should I change camera resulotion, during my app runtime,
into 320*240 without any notification for user(that is in process) if the user is not using 320*240?
Thanks dsmith!

Thanks aaroncohn!
You can have a reference to my reply to dsmith about clarifying my question.
If there's process code to handle such question domain, please give me a hint or instruction or reference or even source code, anyway.
Thanks aaroncohn!

http://www.gidforums.com/t-2569.html

I remember that you posted this awhile ago, and it appears to contain a function call to initialize the camera with a certain size.

This appears to do what you want to do. I don't see anything wrong with shutting down the camera and reinitializing it just to change the capture resolution.

__________________
-Aaron

Thanks aaroncohn!
Yes! I had posted such program code like:

BOOL Init(HWND hwnd, int width=320, int height=240);

But the purpose of this code is to DISPLAY camera image with 320*240 and to run my app normally "but not to CHANGE camera resolution into 320*240 under the circumstance of user who do not use 320*240 as his/her camera default resolution."

My question is:

If a user usually use 640*480 or other resolution not 320*240,
my app will not allow such envrinment to run and will be terminated.
How should I "CHANGE" camera resulotion, during my app runtime,
into 320*240 without any notification for user(that is in process) if the user is not using 320*240?

uhh... refer to my first post... the one near the top

__________________
-Aaron