Someone got me a portable DVD player at Christmas (a Tevion 45688). It's supposed to be able to play mp4 files from a USB stick or SD card, so I was hoping to load up a USB stick with movies. Having tinkered around with it and tried a few different files, I've yet to be able to get any files to play properly (either getting audio with no video, or nothing at all). I've tried some downloads, some digital copies from DVDs, and tried converting to mp4 using WinFF but to no avail. The only support I can find for the device says "files need to be in mpeg mp4 format". Any help appreciated.