[MPlayer-users] problem with the aspect ratio

[pablo daniel rey]

>El Lun 28 Feb 2005 09:18, Moritz Bunkus escribió:
>Hey,
>
>The AVI headers contain a field for aspect ratio, the OGM headers don't.
>The solution is not to use OGM. Use Matroska instead.
>
>Mosu
>
>-- 
>If Darl McBride was in charge, he'd probably make marriage
>unconstitutional too, since clearly it de-emphasizes the commercial
>nature of normal human interaction, and probably is a major impediment
>to the commercial growth of prostitution. - Linus Torvalds

how can i transform an .avi file into matroska?
is there any utility like ogmmerge but for matroska?.
thanks