Final answer:
In audio and video editing, filler is used to replace trimmed sections in one track to keep it in sync with the others. This method is necessary for ensuring a seamless viewer or listener experience in the final product.
Step-by-step explanation:
In video and audio editing, filler is often used to maintain sync when editing multiple tracks simultaneously. Filler is essentially non-content that you insert to replace trimmed sections, so the remaining sections stay in sync. When you trim a section from one track, you insert an equivalent amount of filler in its place to keep the rest of that track in line with the others.
For instance, when trimming an interview video consisting of both audio and visuals, if we cut out a portion of the speaker's dialogue, we can place filler in that gap to prevent the video and audio timelines from going out of sync. This would make sure the audio still aligns with the person talking in the video.
Thereby, using filler in maintaining sync becomes crucial in ensuring a seamless viewing or listening experience in the final product.
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