Getting Video Dimensions

[mbowen89]

So, I am really new to C++. I have Visual C++ 2008.

How can I retrieve the width and height from a video file?

Thanks for any help!

[martinlb]

It depends on the format.
That information is usually in the header of the file. For example, in .avi files, the width is defined by the 4 bytes at offset 64 and height by those at offset 68

[mbowen89]

I would need to be able to look at the most popular formats.

By telling me what you did, how can I get the information from that avi file? Could you give me an example script?

[martinlb]

this would show the dimensions of an avi file in most systems:

// avi width and height
#include <iostream>
#include <fstream>
using namespace std;
int main()
{
	int width,height;
	std::ifstream f;
	f.open ("thevideo.avi",f.binary|f.in);
	f.seekg(64,f.beg);
	f.read((char*)&width,4);
	f.read((char*)&height,4);
	f.close();
	std::cout << width << "x" << height << "\n";
	return 0;
}

[kia]

hi! could u explain me what is avi file and what is it use of ?
thnx :).