CMTime

Declaration

struct CMTime

Overview

Core Media represents time as a rational value, with a time value as the numerator and timescale as the denominator. The structure can represent a specific numeric time in the media timeline, and can also represent nonnumeric values like invalid and indefinite times or positive and negative infinity.

Topics

Creating a Time

• init(value:timescale:)
• init(value:timescale:flags:epoch:)
• init(seconds:preferredTimescale:)
• init()

Inspecting a Time

• seconds
• hasBeenRounded
• isValid
• isNumeric
• isIndefinite
• isPositiveInfinity
• isNegativeInfinity

Performing Time Calcualtions

• +(_:_:)
• -(_:_:)

Changing the Timescale

• convertScale(_:method:)
• CMTimeRoundingMethod

Accessing Time Values

• value
• timescale
• flags
• epoch

Constants

• zero
• invalid
• indefinite
• negativeInfinity
• positiveInfinity

Operators

• !=(_:_:)

Relationships

Conforms To

• BitwiseCopyable
• Comparable
• Copyable
• Equatable
• Escapable
• Hashable
• Sendable

See Also

Data Types

• CMTimeValue
• CMTimeScale
• CMTimeEpoch
• CMTimeFlags