[VCDImager] Compliant way for muxing MPG stills

[Andrea Gimignani]

I've finally set up my linux box, and I managed in creating mpg stills.
Now I've to mux them.

I've noticed that using:
mplex -f 6 -o still.mpg lowres.m1v hires.m1v
or:
mplex -f 6 -o still.mpg hires.m1v lowres.m1v
gives different results.

(If you watch them with M$ media player, in the first case you see the
low-res image, in the second case you see the high quality still!)

What is the compliant way to multiplex them?

Thank you!

Andrea