Hi, thanks for the help.
I solved the problem
I go to export settings ==> AVI movie ==> uncompressed
However, I noticed that the sound either does not work if I do this
or, the file won't open at all.
Only when I do export settings ==> avi movie ==> uncheck export audio option then the file works with full quality
Is there any suggestion about the sound?
although I managed to solve the problem by inserted the exported avi movie into Windows movie maker and then adding the sound, which worked just fine for me, but I am keen to know how to do this without discarding the sound in swish and then using windows Movie Maker just to add the sound!