[MEncoder-users] 4X3 to 16X9 adding pillar-boxing

[James Hastings-Trew]

Laine Lee wrote:
> I want to convert a short 4X3 mpeg2 clip so that it can be added among
> existing mpeg2 passages which are 16X9. How can I perform the conversion
> from 4X3 to 16X9 so that pillar-boxing results, preserving aspect ratio of
> the 4X3 content? Thanks.
>
>
> Laine Lee
>   
You'll have to scale the video correctly, and then expand the image area 
accordingly.

-vf scale=540:480,expand=720:480

(this is assuming NTSC - if it is PAL, you'll have to do the math yourself).