There is another sample here for 320x240
http://www.mympxplayer.org/sample-ro...ons-df628.html
Also have you tried the viDrop convertor?
http://www.mympxplayer.org/vidrop-v0...ter-df741.html
and enter this line into Advanced settings / Extra parameters
-vf-add scale=320:240 -vf-add expand=320:240:-1:-1:1