trying to convert stuttering video but having problems

[billsantos]

Recently I downloaded four streaming videos. Three of them play at 24 fps and present no problems. The fourth however plays at something around 23.5 or 23.976 fps and shows significant stuttering. At first I used a program called AVIdemux to change frame rate from 23.5 to 24 fps. This solved the stuttering, but now I am left with out of sync audio that I can't seem to remedy. AVIdemux seems to allow audio frame rate changes from NTSC to PAL or similar, but I can't input a deluxe change. I've tried adjusting the audio offset, but the longer the video plays, the more out of sync the audio becomes. Need some help here..... if I change the video from 23.5 to 24 fps, what has to be done exactly to the audio to compensate? Is there software that can perform both tasks simultaneously and successfully?

Thanks.