Giz*_*odo 5 avfoundation ios cmsamplebuffer swift
我正在尝试找出哪种方法可以更好地捕获 JPEG
AVFoundation -> PhotoCaptureDelegate
我可以用:
photoSettings = AVCapturePhotoSettings(format: [ kCVPixelBufferPixelFormatTypeKey as String: Int(kCVPixelFormatType_32BGRA) ])
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或者
photoSettings = AVCapturePhotoSettings(format: [AVVideoCodecKey : AVVideoCodecJPEG, AVVideoCompressionPropertiesKey : [AVVideoQualityKey : 1.0]] as [String : Any])
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我注意到使用AVVideoCodecJPEG,我可以使用压缩质量;但是,如果我在PhotoCaptureDelegate中的CMSampleBuffer中执行任何 TIFF 转换或其他任务,则无法使用。
然而,如果我想以新的方式保存到 JPEG(猜测最有效的方式,我必须使用AVVideoCodecJPEG来执行以下操作:
func capture(_ captureOutput: AVCapturePhotoOutput, didFinishProcessingPhotoSampleBuffer photoSampleBuffer: CMSampleBuffer?, previewPhotoSampleBuffer: CMSampleBuffer?, resolvedSettings: AVCaptureResolvedPhotoSettings, bracketSettings: AVCaptureBracketedStillImageSettings?, error: Error?) {
self.jpegPhotoData = AVCapturePhotoOutput.jpegPhotoDataRepresentation(forJPEGSampleBuffer: photoSampleBuffer, previewPhotoSampleBuffer: previewPhotoSampleBuffer)
}
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使用哪个更好?
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