well, dvd2onex is good, but using popcorn is better in the way that it compresses as it burns,
or rather, before it starts burning. but Ive come to find that popcorn, if youre compressing say a 7 gig dvd rip to fit on a single 4.7 gig dvdr. popcorn gives quality ratings and it comes out according to the quality, like good quality is good, mjeaning little or no compression needed,but it causes small skips in unimportant areas of dvds, like the 20th century fox opening.I personally use dvd21onex cause you can spewcify quiality and the size disc youll be burning to, then I burn in popcorn which will compress a tiny bit more if needed, but its usually not.