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Windows 7: How to determine the current aspect ratio of an mp4 file

02 Dec 2013   #1

Windows 7 Pro 64bit
How to determine the current aspect ratio of an mp4 file

Running Windows Media Center on Windows 7 operating system.

Many mp4 files now play in letterbox mode. They used to play in full screen.

I copied an mp4 file to another Windows 7 pc and the file played in letterbox mode.

So, I have to assume somehow the mp4 file changed.

1.) How can I determine the aspect ratio of an mp4 file?

2.) How does knowing the frame width and frame height help determine aspect ratio?

My System SpecsSystem Spec
03 Dec 2013   #2

W7 Pro SP1 64bit

Answer 1: Install MediaInfo...
...then right click on a media file
...and select MediaInfo from the context menu.

Answer 2: I'll let others explain how the aspect ratio is determined from those numbers.
My System SpecsSystem Spec

 How to determine the current aspect ratio of an mp4 file

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