I've gotten the impression that when you take an existing video, make adjustments, and then reburn it, you lose a slight bit of quality, due to it being "one step down" from the original. That was certainly true when we were making copies of VHS tapes. Is that digitally true, too?
I have this HD video I downloaded. The audio is a bit low. Since I want to show this on a projector and play it through some portable speakers, I'd like to change the audio gain and re=burn it. Is there a way to save a file with changes, and not lose quality of the video? Or is that really an issue?
Depending on your compression, there is likely to be a difference, but you will not see it with the eyes. Please consider the following discussion.