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SMPTE Time

SMPTETime

SMPTE time is a format used to sync audio and video streams, based on video framing.

typedef struct SMPTETime {
UInt64 mCounter;
UInt32 mType;
UInt32 mFlags;
SInt16 mHours;
SInt16 mMinutes;
SInt16 mSeconds;
SInt16 mFrames;
} SMPTETime;

Availability

• Available in Mac OS X v10.0 and later.

Declared In

In this section:

SMPTE Types
SMPTE Time Stamps

SMPTE Types

These constants are used for the mType value in SMPTETime to specify different frame rates.

kSMPTETimeType24 = 0

kSMPTETimeType25 = 1

kSMPTETimeType30Drop = 2

kSMPTETimeType30 = 3

kSMPTETimeType2997 = 4

kSMPTETimeType2997Drop = 5

SMPTE Time Stamps

These constants are used for the mFlags value in SMPTETime.

kSMPTETimeValid = (1L << 0)

kSMPTETimeRunning = (1L << 1)

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