pal > ntsc with 5.1 sound

iam trying to convert a ac3 pal to ntsc and keep 5.1 sound i extractrd audio with virtualdub and encode it with besweet and ac3machine changing the framerate from 25000fps > 29970fps and selecting 5.1 output and same bitrate as origanal ac3 file (448) i end up with a working ac3 file but it is about 17 seconds shorter than the encoded video file and seems to play back at a faster speed i also tryed using bsweetgui and besweetv.15b with gives the same length ac3 file as the video with5.1 but is al scathy sounding with no bass at all is there a way to get an ac3 5.1 to match my video or to fix the ac3 file i encoded with ac3machine so that is not 17 seconds shorter than video any help would be very welcome ty in advance :confused:

when converting film from PAL to NTSC you have to do a slowdown from 25.000 fps to 23.976 fps. A speedup to 29.970 fps is wrong!

the video i encoded from 25000 > 29970 fps using canopus procoder but it only outputs audio in 2 channel witch works if i convert it to ac3 but i want to keep th 5.1 that came with it i thought i needed 29970 fps for a dvd ? procoder has the frame rate box grayed out and can not change it from 29970 fps

i used nandub to etract ac3 witch i saved as .wav then used besliced on .wav renaming it to .ac3 there was also a sync error that besliced fixed. then i authored .ac3 and video encoded at 29970 fps with maestro and it plays perfect on pc and stand alone with 5.1 sound but i don't understand why unless besliced changed framerate i thought besliced just fixed damaged audio files because the .wav i extracted from origanal source is 25000fps and video is encoded at 29970 fps anyway it works but would be nice to know why ?:D

is there a way to take an AC3 and extract each of its channels to a wav file independently (1st channel = 1 wav, 2nd channel = 2nd wav, and so on) I know this question might be dumb, but I am new into this AC3 thing, I usually just take the AC3 and convert it with headache to a sinlge WAV sound and then back to AC3 using the tool from Scenearist. If this question has been answered before, I beg you please forgive me, since I just couldnt find what I was looking for since there were too many answers : oS Thanks