A Practical Guide to Video and Audio Compression

37

Preparing the Audio for Encoding

37.1 Audio Preprocessing

Now that the video is preprocessed and ready for encoding, the audio must be processed. There are several things that need to be checked, although there is no set order to doing these. Obviously, you want to make sure that each step removes unwanted artifacts without undoing what you did in the previous step.

37.2 Trimming and Cropping

The audio usually accompanies some video, so their durations must be cropped to the same length. The editing software should be maintaining the edits on the audio track as the video is cut; otherwise the lip sync is broken. There are occasions when the ...