w3c / w3c/webcodecs

"Presentation timestamp" is not defined in spec

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Description

The timestamp attribute of a frame is defined to be the "presentation timestamp", but that term is never defined.

Suggested definition:

The presentation timestamp is an indication of expected relative time of display between two frames. It is not guaranteed to correspond to any real (wall clock) time.
For live media, it is RECOMMENDED that the timestamp be the wall clock time of camera capture, to the precision that this can be ascertained.

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