Contents

VTFrameSiloCallBlockForEachSampleBuffer(_:in:handler:)

Retrieves sample buffers from a frame silo object.

Declaration

func VTFrameSiloCallBlockForEachSampleBuffer(_ silo: VTFrameSilo, in timeRange: CMTimeRange, handler: (CMSampleBuffer) -> OSStatus) -> OSStatus

Parameters

  • silo:

    The frame silo object.

  • timeRange:

    The decode time range of sample buffers to retrieve. Pass kCMTimeRangeInvalid to retrieve all sample buffers from the VTFrameSilo.

  • handler:

    A block to be called, in decode order, with each sample buffer that was added. To abort iteration early, return a nonzero status. The VTFrameSilo object may write sample buffers and data to the backing file between addition and retrieval; do not expect to get identical object pointers back.

Return Value

kVTFrameSiloInvalidTimeRangeErr if any time ranges are non-numeric, overlap, or are not in ascending order. Returns any nonzero status returned by the handler block.

Discussion

You call this function to retrieve sample buffers at the end of a multipass compression session.

See Also

Configuring Frame Silos