[MPlayer-users] Transcoding from one aspect ratio to another

[Reimar Döffinger]

On Fri, Nov 05, 2010 at 09:40:43AM +0100, Oliver Seitz wrote:
> >In that case I should maybe at least mention that your
> >example with audio made me think if something like
> >this is possible for video as well.
> >To be specific, I am talking about e.g. stretching a video
> >to be more wide than it was originally, but without it
> >looking strange.
> 
> In contrast to your suggestion on changeing the image dependent on
> its content, I remember to have seen something like that built-in in
> some widescreen TV. It was a different approach though: The center
> of the image, that usually conatins the more important things was
> not touched at all, while the sides were stretched more to
> compensate the missing pixels. There was a smooth gradient from
> no-stretch to maximum-stretch, perhaps sine-like.
> 
> It looked so good in fact that I hadn't seen the trick at all if
> there hadn't been a horizontally scrolling text ticker.

Should be not too hard to come up with a command-line for
-vf geq that does this, if someone is motivated to...