How to find the frames resolution ina video?

Hello i am trying to find the resolution of each frame in a video .I tried this :

FrameRes=read(V,1); %randomly select the first frame of the video 

But i am not sure if this is right . In matlab's workspace i get the result 240x320x3 .Is this correct?

Also , i tried to print message with the result i got like this :

fprintf('The resolution of each frame is %0.4f\n',FrameRes);

but it prints the whole vector (as it should do) . How can i print only resolution i found?

Answer 1

[Walter Roberson]

If you are working with a file rather than a stream:

https://www.mathworks.com/help/matlab/ref/mmfileinfo.html