Math is not my strong suit,,,

[Dave]

Clients upload QuickTime .MOV files to our web site which is written in
Classic ASP.

Our host provider does not have any QuickTime related APIs installed, so
I cannot use the QuickTime API to access data about the MOV files
uploaded.

I want to get the following information:

Width, Height, Frame Rate, Duration

After googling for an hour I could not find any sample code to get this
info in ASP, PHP, Perl or any other language I can read. But I did find
a link to:

http://developer.apple.com/documentation/QuickTime/QTFF/qtff.pdf

Which is the QuickTime file format.

It's taken a couple of hours, but I've managed to write some code to get
the Width and Height of the MOV file, and the duration in full seconds.
But I can't figure out the frame rate or the number of frames if the
duration is not an even number of seconds.

These are the values I have to work with:

qt_time_scale = 7680
qt_duration = 85504

seconds = qt_duration \ qt_time_scale

But there is a remainder and I can't figure out how to calculate how
many frames that remainder is...

Has anyone else done this?

 

[jp2code]

Dave,

Thanks for helping with my post immediately below yours.

Maybe I can help you, but I'm not great at ASP:

Can ASP calculate a modulus?

If A = 5 and B = 2, then in C/C++:

value = A / B = 2;
// value would be 2 because 2 goes into 5 twice

remain = A % B = 1;
// remain would be the remainder.

HTH,
Joe

 

[Dave]

Nevermind, I figured it out. All frames are a constant size of "256",
so I just divide the remainder by 256 to get the number of frames left.

And, if I divide the qt_time_code by 256 I get the frame rate.

--Dave