[MPlayer-users] General video question so as to understand movie aspect

[Martin Collins]

On Wed, 06 Sep 2006 07:23:25 +1200
Phil Bertram <phil.bertram at clear.net.nz> wrote:

> Am I correct to assume that after I crop off the black bars and
> thus have a movie that is 16/9 shape (crop=688:416:16:80), the
> movie is still has an aspect of 4/3 and so aspect I should use
> -aspect 4/3 when encoding with mencoder.

With PAL the general formula is
 aspect = width * 1.094 / height
since PAL pixels are not square.

So in this case you would use
 -lavcopts aspect=752/416
which is close to, but not exactly, 16/9.

Martin