I've noticed recently that the quality of the video in the preview windown when the DVD is burning is completely different from the quality of the video when I play the disc back on my PS3 or DVD player.

In the preview window when burning the video footage looks smooth and clear but when the disc is played back on an external DVD player the footage is pixelated and very hard to watch. I've used this program before to convert a single .AVI file and the quality was great. So my question is why is this happening?

thank you!