Why are my authored dvd movies jumping from one scene to another?

[KJ2009]

I am using AVS DVD authoring software (can't remember the build, 1.6 I think) and when I make a movie disc everything goes so well, with no error messages. However in my friends DVD player the movie jumps around. Could it be the age of the model? Am not sure if he just has a crappy dvd player or I am doing something wrong. Either way I am starting to get annoyed because now he is ridiculing my DVD authoring skills.

For example yesterday I put 2 movies on 2 separate DVDS. One of them was 5 times bigger data size (4 Gb) compared with the other DVD AT (700Mb) yet the picture quality was very similar on both discs

They both played for about 10 minutes before hopping back to near the start of the chapter. Sometimes they hop forward.

Is it the DVD PLAYER? BOUGHT 1990 i THINK = £135 or am I missing something.

Also does other BACKGROUND activity on your PC affect the finished DVD? I have a 2 GHZ Core 2 duo and 2 gig ram 250gb HD

BY THE WAY, DOES ANYONE KNOW HOW TO MAKE AVS DVD AUTHORING COMPATIBLE WITH WINDOWS 7? I CAN'T GET IT TO WORK NOW i HAVE WIN 7

[guns1inger]

I Don't know the software in question, but the place to start for support would be their website. There may be an update for Win 7 compatibility. That said, I would suggest there is better software around, some of it free.

1990 would make it one of the first DVD players, so it has probably seen a lot of playback, and will not be aware of current blanks. This might cause issues.

You would have to post mediainfo tree outputs of the source files, but generally the size of the source has little to do with the size of the finished DVD. A 4GB MKV file and a 700 MB AVI that are 90 minutes movies, for example, will produce the same sized files for DVD.

I would try using a different program - AVStoDVD, for example - to see if it is the software.