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First HDD MPEG4 Video Camcorder

wesman keyframes make it possible (321 comments)

Mpeg like most other video compression schemes uses key frames. Every so many frames it does 1 complete frame that doesn't rely on the previous frames to generate an image. Start the tape and it will give you nothing for a couple of seconds until it hits a key frame then the video starts. Digital cable and DSS television work this way. Ever wonder why it takes more time to change channels than with analog? Thats why.

more than 11 years ago


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