Have you checked for any updates for your Nero? It sounds like a frame-rate issue. If so it could be for a no. of reasons. Are you sure it was the standard format that your dvd player uses? (ie: PAL/NTSC/SECAM - which use different frame rates.) Is your player compatible with more than one format? In my country all players are made to be compatible with them all. Some have switches/buttons/menu options on them so you can switch over to the other format. Did you try playing the disk on your computer?

Some people change the frame-rate as a means of helping to compress the file.

Did you burn it to cd/dvd?