[MPlayer-users] loosing part of the picture with resizing?

[Bernd Butscheidt]

> you must use either "-vf scale=720,-2,expand=:::::16/9:16" or "-zoom -xy 720" but not both

Thanks for the hints.

Trying 

"-zoom -xy 720"

alone changes nothing, the resolution stays at 720*576

"-vf scale=720:-2,expand=:::::16/9:16"

works and the good news: no picture content is left out.

But I am still confused:

- Why do I need the video filter expand on top? Leaving it out leads to the resolution 720*406 (using 720:-2) or 720*400 (using 720:-10).
Using the expand filter on top leads to a resolution of 736*416. 

- I would have expected to use "-vf scale=720:-3" or "-vf scale=720:-11" to use the original aspect ratio instead of the "prescaled" (I tried it, the resolution doesen't change again and stays at 720*576 although mencoder recognizes it as 16:9). Where is the aspect ratio prescaled?

Thanks again for any answers
Bernd B.