As for the audio its 256 kbps DD 2.0
I also want to update that when join two MPEG 2 files with MPEG2VCR there is a lock up on old DVD players. Very old DVD player. I have one of the first Sony DVD players. it has also had problems with Lord Of the Rings the real copy not the back up. I have test my back up of Star Wars on APEX Panasonic Playstation 2 and Pioneer no problems. I did a test on another sony player a newer one about a year or two old after the second break you see some green blocks. Seems funny that Sonys Playstation 2 did a better job then a stand alone sony DVD player. So the only problem that really big is my old six or seven year old sony DVD player.
Also I did make a back up set with my Panasonic E80 using FR mode this set was made about a year ago this set has no problems with play back on my Sony DVD player.
I will rate my SP copies If laser Disc copies are a 10 then my SP copy would be a 9.5 my FR mode copies would be 9.3
Yes the Sp copies are little better but after watching them again and taken a second look FR copy is very close second. But if you are going to make a FR copy and dub down do it in the one hour mode XP.