hope i am in the right forum. sorry if not

I downloaded an avi OpenDivx v4, that is playing too slow. this is a concert so the result is pretty bad.
i have tried to play it in divx, powerdvd,winamp, atifile reader,windows media, no change.
i imported it in premiere pro to increase the speed to 120% and it works fine.
problem is that half of the audio file is not imported in premiere, for whatever reason. so it is pointless to reencode the whole file.
the file is in sync and the video quality is good for info

do you have an idea to "reencode" or to play this file at a 110 or 120% speed?

thank you very much in advance
didier