hi, i have a few movies that i burned to dvd, i had them as an avi, converted them to dvd files, and burned them using dvd shrink. the file was no bigger than 2gb so there was no compression needed. when the dvd is played there are some green marks that appear when there is a quick change in light in any scene. does anyone know why this happens or what it is? is it because i am using dvd shrink? i really have no idea so any comments would be helpful for future backups. thanks.