VideoToolbox Namespace
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The VideoToolbox namespace provides low-level classes for encoding and decoding video streams.
Classes
| VTCompressionProperties |
Strongly typed set of options for compression sessions |
| VTCompressionPropertyKey |
A class that encapsulates keys necessary for compression sessions. Used by VTCompressionProperties |
| VTCompressionSession |
Turns uncompressed frames into compressed video frames |
| VTDecompressionProperties |
Strongly typed set of options for decompression sessions. |
| VTDecompressionPropertyKey |
A class that encapsulates keys necessary for decompression sessions. Used by VTDecompressionProperties |
| VTDecompressionResolutionKeys |
A class that encapsulates keys necessary by VTEncodeFrameOptions. |
| VTDecompressionResolutionOptions |
Strongly typed set of options used by ReducedResolutionDecode. |
| VTDecompressionSession |
Turns compressed frames into uncompressed video frames. |
| VTEncodeFrameOptionKey |
A class that encapsulates keys necessary by VTEncodeFrameOptions |
| VTEncodeFrameOptions |
Strongly typed set of options. |
| VTFrameSilo |
Sample buffers storage object, used in conjuction of a multi pass compression session |
| VTH264EntropyModeKeys |
A class that encapsulates keys necessary by VTH264EntropyMode. |
| VTMultiPassStorage |
Class that provides a storage for encoding metadata. |
| VTMultiPassStorageCreationOptionKeys |
A class that encapsulates keys necessary by VTMultiPassStorageCreationOptions |
| VTMultiPassStorageCreationOptions |
Strongly typed set of options. |
| VTPixelTransferProperties |
Strongly typed set of options used by PixelTransferSettings. |
| VTPixelTransferPropertyKeys |
A class that encapsulates keys needed by VTPixelTransferProperties. |
| VTProfileLevelKeys |
A class that encapsulates keys necessary by VTProfileLevel. |
| VTPropertyKeys |
A class that encapsulates keys necessary by VTPropertyOptions. |
| VTPropertyOptions |
Strongly typed set of options. |
| VTPropertyReadWriteStatusKeys |
A class that encapsulates keys necessary by ReadWriteStatus. |
| VTPropertyTypeKeys |
A class that encapsulates keys necessary by VTPropertyType. |
| VTSession |
Base class of VTCompressionSession and VTDecompressionSession. |
| VTSupportedEncoderProperties | |
| VTUtilities |
Extensions class for CVPixelBuffer. |
| VTVideoDecoderSpecification |
Strongly typed set of options. |
| VTVideoDecoderSpecificationKeys |
A class that encapsulates keys necessary by VTVideoDecoderSpecification. |
| VTVideoEncoder |
Class to fetch available encoders |
| VTVideoEncoderSpecification |
Strongly typed representation of a video encoder. |
| VTVideoEncoderSpecificationKeys |
A class that encapsulates keys necessary by VTVideoEncoderSpecification. |
Structs
| VTDataRateLimit |
Strongly typed representation of bytes and seconds used in DataRateLimits. |
Enums
| VTColorPrimaries |
Represents color primaries in compressed sample buffers |
| VTCompressionSessionOptionFlags |
Flags to control encoder in multi pass compression sessions |
| VTDecodeFrameFlags |
Flags to control encoder in a decompression session |
| VTDecodeInfoFlags |
Flags for status reporting in decoding sessions. |
| VTDeinterlaceMode |
Deinterlacing techniques. |
| VTDownsamplingMode |
Chroma downsampling techniques. |
| VTEncodeInfoFlags |
Encoding status flags. |
| VTFieldCount |
Frame encoding options. |
| VTFieldDetail |
Field ordering options. |
| VTFieldMode |
Decoder field mode options. |
| VTH264EntropyMode |
Strongly typed set of options used by H264EntropyMode. |
| VTOnlyTheseFrames |
Strongly typed set of options used by OnlyTheseFrames. |
| VTProfileLevel |
Strongly typed set of options used by ProfileLevel. |
| VTPropertyType |
Strongly typed set of options. |
| VTReadWriteStatus |
Strongly typed set of options used by ReadWriteStatus. |
| VTScalingMode |
Image scaling options. |
| VTStatus |
Possible VideoToolbox API errors. |
| VTTransferFunction |
Strongly typed set of options used by TransferFunction. |
| VTYCbCrMatrix |
Colorimetry for compressed content. |
Delegates
| VTCompressionSession.VTCompressionOutputCallback |
Handler prototype to be called for each compressed frame |
| VTDecompressionSession.VTDecompressionOutputCallback |
Handler prototype to be called for each decompressed frame. |
Remarks
Use VideoToolbox to create your own video encoding or decoding applications: Use VTCompressionSession to compress frames and VTDecompressionSession to decompress frames.
Take advantage of the strongly typed dictionaries like VTCompressionProperties and VTDecompressionProperties to set your compression an decompression settings.