[MPlayer-users] How to force SSA subtitles size to constant one ?

[Evgeniy Stepanov]

On Sunday 05 August 2007, Παναγιώτης Κατσαλούλης wrote:
> On 04 Αυγ 2007, at 11:27 ΜΜ, Evgeniy Stepanov wrote:
> > On Saturday 04 August 2007, Παναγιώτης
> >
> > Κατσαλούλης wrote:
> >> So, the only way to set a font to a fixed size is to do something
> >> like:
> >> -ass-font-scale (PlayResY/video height)
> >
> > No, -ass-font-scale multiplies all font sizes by a fixed amount.
> > Different
> > styles will look differently. What you meant is probably -ass-force-
> > style
> > FontSize=(desired size * PlayResY / video height).
>
> Well, if I just want to keep the "original" font size, i.e. the one
> described in the ssa/ass file (and not a constant size all over) ,
> then it is better to use -ass-font-scale instead of -ass-force-style
> - right?

Keeping original font size is the default behaviour. If you want to 
proportionally increase or decrease all font sizes, use -ass-font-scale.

> Moreover, if the PlayResY is not defined, I have seen this message:
> [ass] PlayResX undefined, setting 917.
> Is this a constant number? Or is it somewhat calculated?

It is calculated as PlayResX / (video AR). If both PlayResX and PlayResY are 
undefined, they are set to 384x288.