Video Convertion

Hello,
I have several video clips mp4 format, 720 x 960 size. I am trying to resize them to 720 x 1280, bitrate and frame rate stay the same.
To do this I use "Format Factory" and "VideoPad Video editor"(each at a time), in both I make all the settings and start the encoding, after a while the final video (mp4) remains 720 x 960 size. Checked again all the settings, do again the encoding
with same results.
Any tips will do.
Thanks for answering.
Motim

Hello Forum,
So sorry I forgot to write this: Sometimes "Format Factory" resizes the clip to 720 x 1280 by adding black margins on both sides.
Sorry
Motim