April 2005
Intermediate to advanced
800 pages
20h 52m
English
Content preview from A Practical Guide to Video and Audio CompressionBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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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 ...
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