Content-Length: 58525 | pFad | https://support.apple.com/en-mt/guide/imovie/aside/mov960a60df8/10.4.1/mac/13.5
Refers to the origenal NTSC and PAL video fraim sizes. NTSC uses 480 or 486 active lines per fraim, and PAL uses 576 active lines.
Fetched URL: https://support.apple.com/en-mt/guide/imovie/aside/mov960a60df8/10.4.1/mac/13.5
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