pub unsafe static kVTDecompressionPropertyKey_RequestedMVHEVCVideoLayerIDs: &'static CFStringVTDecompressionProperties only.Expand description
Requests multi-image decoding of specific MV-HEVC VideoLayerIDs.
MV-HEVC specific. Requires that the VTDecompressionSession client use VTDecompressionSessionSetMultiImageCallback to install a callback capable of receiving CMTaggedBufferGroups in response to multi-image DecodeFrame requests. The property value is a CFArray containing VideoLayerIDs as CFNumbers. MV-HEVC VideoLayerIDs not in this list do not need to be output, and the decoder may skip decoding them if not otherwise necessary. The property is NULL by default. If this property is NULL, MV-HEVC shall be decoded ignoring layers other than the base layer. Terminology note: in multi-image decompression, a single video sample (from one CMSampleBuffer) contains a single frame (with one PTS) that is decoded to produce multiple images.
See also Apple’s documentation