从CVPixelBuffer
创建CMSampleBuffer我得到一个CVPixelBuffer从ARSessionDelegate:从CVPixelBuffer
func session(_ session: ARSession, didUpdate frame: ARFrame) { frame.capturedImage // CVPixelBufferRef
}
但我的应用程序的另一部分(即我不能改变)使用CMSampleBuffer。
CMSampleBuffer是CVPixelBuffer的容器。
为了创建一个CMSampleBuffer我可以使用此功能:
func CMSampleBufferCreateReadyWithImageBuffer(_ allocator: CFAllocator?, _ imageBuffer: CVImageBuffer,
_ formatDescription: CMVideoFormatDescription,
_ sampleTiming: UnsafePointer<CMSampleTimingInfo>,
_ sBufOut: UnsafeMutablePointer<CMSampleBuffer?>) -> OSStatus
唯一缺少的参数对于我来说是sampleTiming
- 我怎么能提取从CVPixelBuffer?
回答:
的sampleTiming主要包含presentationTimeStamp
,您可以通过以下代码轻松创建:
let scale = CMTimeScale(NSEC_PER_SEC) let pts = CMTime(value: CMTimeValue(frame.timestamp * Double(scale)),
timescale: scale)
var timingInfo = CMSampleTimingInfo(duration: kCMTimeInvalid,
presentationTimeStamp: pts,
decodeTimeStamp: kCMTimeInvalid)
以上是 从CVPixelBuffer 的全部内容, 来源链接: utcz.com/qa/265510.html