kCMSampleAttachmentKey_NotSync
Indicates whether the sample is a sync sample (type CFBoolean, default false).
Declaration
let kCMSampleAttachmentKey_NotSync: CFStringDiscussion
A sync sample, also known as a key frame or IDR (Instantaneous Decoding Refresh), can be decoded without requiring any previous samples to have been decoded. Samples following a sync sample also do not require samples prior to the sync sample to have been decoded. Samples are assumed to be sync samples by default — set the value for this key to kCFBooleanTrue for samples which should not be treated as sync samples.
This attachment is read from and written to media files.
See Also
Sample Keys
kCMSampleAttachmentKey_PartialSynckCMSampleAttachmentKey_DependsOnOtherskCMSampleAttachmentKey_IsDependedOnByOtherskCMSampleAttachmentKey_DisplayImmediatelykCMSampleAttachmentKey_DoNotDisplaykCMSampleAttachmentKey_EarlierDisplayTimesAllowedkCMSampleAttachmentKey_HasRedundantCodingkCMSampleAttachmentKey_PostDecodeProcessingMetadata