我的帧率低是因为时间戳设置为1s了，需要手动设置一下偏移量
// MARK: 屏幕共享
func startSharingScreen(renderer: RTCVideoRenderer) {
guard let videoSource = screenCapture else {
return
}
var tempTimeCount = 0
let recoder = RPScreenRecorder.shared()
recoder.startCapture { (buffer, type, error) in
switch (type){
case .video:
let pixelBuffer:CVPixelBuffer = CMSampleBufferGetImageBuffer(buffer)!
let rtcPixelBuffer = RTCCVPixelBuffer(pixelBuffer: pixelBuffer)
let timeStampNs = UInt64(CMTimeGetSeconds(CMSampleBufferGetPresentationTimeStamp(buffer)) + Double(tempTimeCount)) * NSEC_PER_SEC
let videoFrame = RTCVideoFrame(buffer: rtcPixelBuffer, rotation: ._0, timeStampNs: Int64(timeStampNs))
videoSource.capturer(self.videoCapturer!, didCapture: videoFrame)
tempTimeCount += 1
//print(timeStampNs)
break
case .audioApp:
break
case .audioMic:
break
@unknown default:
break
}
} completionHandler: { (error) in
if (error != nil){
print("startSceenCapture completionHandler 出错\(error!)")
}
}
self.localVideoTrack?.add(renderer)
}
