[MPlayer-users] Re: AVI->DVD: Problem understanding expand and scale

[Thomas Heuving]

Giacomo Comes schrieb am Sat, 8 Oct 2005 14:12:22 -0400:
>> But it seems to be necessary to do two invokations, as I didn't find
>>  and nobody mentioned a working example of putting black borders and do
>>  a scaling in one go.
>
> I already told you that that if you do scale-expand you can do it in one pass.
>
> For you particular movie
>
> -vf scale=684:547,expand=720:576  will add 5% border and
> -vf scale=648:518,expand=720:576  will add 10% border
>
> This numbers assumes that your avi has aspect ratio 1:1 and the mpeg aspect 16/9.
> If the aspect ratio is different, the numbers have to be modified.

Can you tell me how you did the math, as I want to do it the next
time by myself.

Thanks
-- 
Thomas Heuving