An example of improving performance of video preview on mobile platform by replacing WebCamTexture of Unity standard API with NatCam.
An example using the new asset "NatDevice" has been published. https://github.com/EnoxSoftware/NatDeviceWithOpenCVForUnityExample
After building an Xcode project from Unity, add the following keys to the Info.plist
file with a good description:
NSPhotoLibraryUsageDescription
NSPhotoLibraryAddUsageDescription