Function

CMSampleBufferGetFormatDescription

Returns the format description of the samples in a CMSampleBuffer.

Declaration

CMFormatDescriptionRef CMSampleBufferGetFormatDescription(CMSampleBufferRef sbuf);

Parameters

sbuf

The CMSampleBuffer being interrogated.

Return Value

The format description of the samples in the CMSampleBuffer or NULL if there is an error.

Discussion

On return, the caller does not own the returned formatDesc, and must retain it explicitly if the caller needs to maintain a reference to it.

See Also

Inspecting Sample Buffers

CMSampleBufferGetDataBuffer

Returns a CMSampleBuffer's CMBlockBuffer of media data.

CMSampleBufferGetDecodeTimeStamp

Returns the numerically earliest decode timestamp of all the samples in a CMSampleBuffer.

CMSampleBufferGetDuration

Returns the total duration of a CMSampleBuffer.

CMSampleBufferGetImageBuffer

Returns a sample buffer's CVImageBuffer of media data.

CMSampleBufferGetNumSamples

Returns the number of media samples in a CMSampleBuffer.

CMSampleBufferGetOutputDecodeTimeStamp

Returns the output decode timestamp of the CMSampleBuffer.

CMSampleBufferGetOutputDuration

Returns the output duration of a CMSampleBuffer.

CMSampleBufferGetOutputPresentationTimeStamp

Returns the output presentation timestamp of the CMSampleBuffer.

CMSampleBufferGetOutputSampleTimingInfoArray

Retrieves an array of output CMSampleTimingInfo structs, one for each sample in a CMSampleBuffer.

CMSampleBufferGetPresentationTimeStamp

Returns the numerically earliest presentation timestamp of all the samples in a CMSampleBuffer.

CMSampleBufferGetSampleAttachmentsArray

Returns a reference to a CMSampleBuffer's immutable array of mutable sample attachments dictionaries (one dictionary per sample in the CMSampleBuffer).

CMSampleBufferGetSampleSize

Returns the size in bytes of a specified sample in a CMSampleBuffer.

CMSampleBufferGetSampleSizeArray

Retrieves an array of sample sizes, one for each sample in a CMSampleBuffer.

CMSampleBufferGetSampleTimingInfo

Retrieves a CMSampleTimingInfo struct describing a specified sample in a CMSampleBuffer.

CMSampleBufferGetSampleTimingInfoArray

Retrieves an array of CMSampleTimingInfo structs, one for each sample in a CMSampleBuffer.

CMSampleBufferGetTotalSampleSize

Returns the total size in bytes of sample data in a CMSampleBuffer.

CMSampleBufferHasDataFailed

Indicates if the sample buffer's data loading request has failed.

CMSampleBufferDataIsReady

Determines if the sample buffer's data is ready.

CMSampleBufferIsValid

Queries whether a sample buffer is still valid.

CMSampleBufferGetTypeID

Returns the CFTypeID of CMSampleBuffer objects.