How to change the aspect ratio?

[Selflezz]

Hi,

I use the ps3 Media Server for a couple of media formats.
Those formats have different aspect ratios (16:9, 4:3, 16:10)

The PS3 Media Server just seem to use one aspect ratio.

It scales every File to full screen not carrying about the original format.

So my question would be iof there a way to change the scaling options for a file or a media format such as mkv,avi or something.

I don't want encode every single video I want to watch or to type the height and the width for every video.

I appreciaty your work!!

Sincerely,
Selflezz