[MPlayer-users] Zooming and Changing Aspect Ratio .. During playback?

[Sammo]

Hi all .. two questions:

1. How do I zoom into a video? From command line, I could crop and 
resize it, but that would be different for each resolution. I just want 
to be able to zoom 105%, 110%, etc ...  Also, is it possible to do that 
while watching the video (not from command line)?

2. How do I change the aspect ratio of a video while watching it? I want 
to be able to change between 4:3, 13:9, 14:9, 15:9, 16:9 ..