ios - Why is the avvideocompositing renderframe not continuous?

Question

Why is the AVVideocompositing renderframe not continuous? I want to use the func startrequest(_Request:avasynchronous videoposition request) method to implement a custom video transition effect. Because the rendering time is not continuous, the transition effect seems to be lagging.

The output is as follows:

compositionTime= CMTime(value: 0, timescale: 1, flags: __C.CMTimeFlags(rawValue: 1), epoch: 0)
compositionTime= CMTime(value: 21, timescale: 600, flags: __C.CMTimeFlags(rawValue: 1), epoch: 0)

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question from:https://stackoverflow.com/questions/65598554/why-is-the-avvideocompositing-renderframe-not-continuous

Answer 1

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