i've got a pal MPEG2 that i'm trying to convert to an NTSC MPEG2 for authoring on a dvd. i've been using the tutorials here for PAL SVCD to NTSC SVCD. but when i run the audio through besweet, it just speeds the audio up, same thing when i run the video through TMPEG, it's not keeping the same overall time. it's a 62 minute MPEG, and the output is either 55 or 75 minutes.

can someone help point out where i'm going wrong?