CODEWITHSUNDEEP
iosobjective-cmacos
Hanns Broun
Hanns Broun

Reputation: 1

CMTimeMake(duration, fps). What is this mean?

I am making video file on my Mac programmatically. I want to know that "CMtimeMake" is what's mean.

For example:

AVAssetWriterInputPixelBufferAdaptor * avAdaptor = [AVAssetWriterInputPixelBufferAdaptor assetWriterInputPixelBufferAdaptorWithAssetWriterInput:writerInput sourcePixelBufferAttributes:NULL];

[avAdaptor appendPixelBufferixelBuffer withPresentationTime:CMTimeMake(1, 10)];

Upvotes: 0

Views: 506

Answers (1)

Akash KR
Akash KR

Reputation: 798

CMTimeMake makes a valid CMTime with value and timescale.

Here in your code:

CMTimeMake(1,10)

A CMTime is represented as a rational number, with a numerator (an int64_t value), and a denominator (an int32_t timescale).

CMTimeMake is called to create CMTime representing times(either durations or timestamps).

1 is the value field of the resulting CMTime and 10 means each unit represents a tenth of a second.

Upvotes: 1

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