OK so I made my first project yesterday. It was a game video. It was made from 4 separate videos. Now First one was okay video and sound were matching like 100 % But when I added the 2,3 and 4th they all had the same issue. The sound at first was going with the video then it started going further and further. By the end of each video the sound goes ahead like with 10 or more seconds for no reason what so ever... I play the video to see if its from the video itself, but its not.
So why does this happen ?