VTCompressionSession.Create 方法
定義
重要
部分資訊涉及發行前產品，在發行之前可能會有大幅修改。 Microsoft 對此處提供的資訊，不做任何明確或隱含的瑕疵擔保。
多載
Create(Int32, Int32, CMVideoCodecType, VTCompressionSession+VTCompressionOutputCallback, VTVideoEncoderSpecification, CVPixelBufferAttributes)
public static VideoToolbox.VTCompressionSession Create (int width, int height, CoreMedia.CMVideoCodecType codecType, VideoToolbox.VTCompressionSession.VTCompressionOutputCallback compressionOutputCallback, VideoToolbox.VTVideoEncoderSpecification encoderSpecification, CoreVideo.CVPixelBufferAttributes sourceImageBufferAttributes);static member Create : int * int * CoreMedia.CMVideoCodecType * VideoToolbox.VTCompressionSession.VTCompressionOutputCallback * VideoToolbox.VTVideoEncoderSpecification * CoreVideo.CVPixelBufferAttributes -> VideoToolbox.VTCompressionSession參數
- width
- Int32
- height
- Int32
- codecType
- CMVideoCodecType
- compressionOutputCallback
- VTCompressionSession.VTCompressionOutputCallback
- encoderSpecification
- VTVideoEncoderSpecification
- sourceImageBufferAttributes
- CVPixelBufferAttributes
傳回
適用於
Create(Int32, Int32, CMVideoCodecType, VTCompressionSession+VTCompressionOutputCallback, VTVideoEncoderSpecification, NSDictionary)
警告
This overload requires that the provided compressionOutputCallback manually CFRetain the passed CMSampleBuffer, use Create(int,int,CMVideoCodecType,VTCompressionOutputCallback,VTVideoEncoderSpecification,CVPixelBufferAttributes) variant instead which does not have that requirement.
建立壓縮會話
[System.Obsolete("This overload requires that the provided compressionOutputCallback manually CFRetain the passed CMSampleBuffer, use Create(int,int,CMVideoCodecType,VTCompressionOutputCallback,VTVideoEncoderSpecification,CVPixelBufferAttributes) variant instead which does not have that requirement.")]
public static VideoToolbox.VTCompressionSession Create (int width, int height, CoreMedia.CMVideoCodecType codecType, VideoToolbox.VTCompressionSession.VTCompressionOutputCallback compressionOutputCallback, VideoToolbox.VTVideoEncoderSpecification encoderSpecification = null, Foundation.NSDictionary sourceImageBufferAttributes = null);static member Create : int * int * CoreMedia.CMVideoCodecType * VideoToolbox.VTCompressionSession.VTCompressionOutputCallback * VideoToolbox.VTVideoEncoderSpecification * Foundation.NSDictionary -> VideoToolbox.VTCompressionSession參數
- width
- Int32
以圖元為單位的框架寬度。
- height
- Int32
以圖元為單位的框架高度。
- codecType
- CMVideoCodecType
用來壓縮畫面格的編碼器。
- compressionOutputCallback
- VTCompressionSession.VTCompressionOutputCallback
將叫用以處理壓縮框架的方法。 如需所接收參數的詳細資訊，請參閱委派類型。
- encoderSpecification
- VTVideoEncoderSpecification
選擇要選擇編碼器的參數，或為 Null，讓 VideoToolbox 選擇它。
- sourceImageBufferAttributes
- NSDictionary
從 CVPixelBufferAttributes 類型擷取的 Dictionary 屬性，或是具有所需 CoreVideo 圖元緩衝區屬性值的 NSDictionary。
傳回
- 屬性
備註
compressionOutputCallback將會依解碼順序為每個畫面叫用 ，而不一定是顯示順序。