Toast creating bad disks

[ibeedug]

Backing up DVDs for personal use.

I start by using MTR (either 2.6 or 3.0) to create Video_ts files.

Then, using Toast 7 or 8, I use FIT TO DVD COMPRESSION.

Toast burns the DVD without errors, but when I try to play the disk on my Mac, (OS 10.4) the dvd chokes on various chapters, (i.e. never the same spot) and crashes. When playing the DVD on a regular DVD player, the movie becomes unviewable at the same trouble spot.

Now, taking the same Video_TS files, I make a DVD with toast on another Mac and I get a Perfect DVD.

I switched media, also.