Stretching the playtime of a .wav file

[ephemeron <eph...@ne...>]

I have an mpeg video whose audio I need to synchronize. The solution I'm
thinking of is to stretch or lengthen the playing time of the audio. I'm
assuming it loses sync at a constant rate. My question: can glame
stretch the total playing time of the sound file ( .wav format) I'll get
from demultiplexing the mpeg video?