help-problem with sound delay on copied dvds

hello
have been backing up some videos i have on my laptop using dvdflick and imgburn

when played back on dvd player the voices and sound isnt matching up
it is playing the sound of someones voice and then they are saying it about 3 secs later

am i doing something wrong with dvdflick or something
can somebody help me

thanks
leanne xxx

 

Try converting one of the problem AVI files with FAVC to see if there's a difference.

 

they arent avi files they are mepg2

leanne xx