[PLUG] ffmpeg to convert video ratio and resolution [UPDATE]

[Rich Shepard]

On Wed, 17 Jun 2020, Rich Shepard wrote:

> I've used the LaTeX Beamer class to prepare PDF slides for presentations
> for more than 20 years. The PDFs are in 4:3 aspect ratio with the default
> resolution dependent on monitor resolution. I can set the display
> resolution in impressive to 800x600, but not to a 16:9 aspect ratio that I
> need for video presentations.

I just learned that the Beamer class option 'aspectratio=169' can be used
... now I need to find where it is to be specified.

This still leaves the resolution to be adjusted with ffmpeg.

Rich