要解决AVCaptureSession视频稳定滞后的问题,可以尝试以下方法:
let captureSession = AVCaptureSession()
captureSession.sessionPreset = AVCaptureSessionPreset640x480
let videoDataOutput = AVCaptureVideoDataOutput()
videoDataOutput.videoSettings = [kCVPixelBufferPixelFormatTypeKey as String: kCVPixelFormatType_420YpCbCr8BiPlanarFullRange]
let videoDevice = AVCaptureDevice.default(for: AVMediaType.video)
do {
try videoDevice?.lockForConfiguration()
videoDevice?.activeVideoMinFrameDuration = CMTimeMake(1, 15) // 设置为15帧/秒
videoDevice?.unlockForConfiguration()
} catch {
// 处理错误
}
func captureOutput(_ output: AVCaptureOutput, didOutput sampleBuffer: CMSampleBuffer, from connection: AVCaptureConnection) {
DispatchQueue.global(qos: .default).async {
// 在其他线程处理视频数据
// ...
DispatchQueue.main.async {
// 在主线程更新UI
// ...
}
}
}
通过以上方法,可以优化AVCaptureSession的配置和视频数据处理,提高视频稳定性和实时性,减少视频滞后的情况。