All “Drop Frames” means is your computer can’t play back video in real time because your hard drive or RAID is too slow for the video format you’re trying to playback.
I unchecked that box once to see what would happen if it stopped warning me. The audio and video just went out of snyc – not permanently – just for that instance where I was playing back video.
It will affect your output if you are outputting to tape. Not if you are exporting a reference or self-contained file.
Robert J. Grauert, Jr.
http://www.robgrauert.com
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