I have a new RCA DVD player, and it usually plays back DVDs correctly... but when the mpeg on the cd is anything other than the standard 352*260 (or whatever the standard size is), the picture flys up and down like an old tv with bad vertical hold.

I have tried changing the dvd player's settings, all I could find was choose between widescreen and fullscreen, and either way it's a problem...

Thanks in advance for any help