[MEncoder-users] Sizing JPEGs Correctly For Any Dimension

[Martin Collins]

On Fri, 26 May 2006 23:08:16 -0400
"Robert Sandie" <sandieman at gmail.com> wrote:

> I think I may have confused.

Yup.

> This is regarding generating images
> from frames in a video. This technique is used to properly show
> images in a pre-defined jpeg size.
> 
> Youtube, Google Video.. everyone does it to create first frame
> images that represent video. 

I don't know what they do. Are you asking how to extract a still image
from a video? Use -vo jpeg, pick the one you want then scale it with
ImageMagick or the Gimp.

Or are you asking how to get your video to display with non-square
pixels? Use -lavcopts aspect=x/y when encoding, but be aware some
players will not respect this.

Martin