How to add multiple resolutions to CMIO camera extension

Hello, I referred to the official camera extension example at https://developer.apple.com/documentation/coremediaio/creating_a_camera_extension_with_core_media_i_o?language=objc. I'm using CMake to build the camera extension plugin and integrate it into a Qt CMake project. When installing the system extension file, I receive a failure prompt with the following message: Error Domain=OSSystemExtensionErrorDomain Code=8 "Invalid code signature or missing entitlements" UserInfo={NSLocalizedDescription=Invalid code signature or missing entitlements} Here are the entitlements files for the camera extension: <?xml version=\"1.0\" encoding=\"UTF-8\"?> <!DOCTYPE plist PUBLIC \"-//Apple//DTD PLIST 1.0//EN\" \"http://www.apple.com/DTDs/PropertyList-1.0.dtd\"> <plist version=\"1.0\"> <dict> <key>com.apple.security.app-sandbox</key> <true/> <key>com.apple.security.application-groups</key> <array> <string>com.yealink.meeting.app</string> </array> </dict> </plist> The info.List.in file for the camera extension: <?xml version=\"1.0\" encoding=\"UTF-8\"?> <!DOCTYPE plist PUBLIC \"-//Apple//DTD PLIST 1.0//EN\" \"http://www.apple.com/DTDs/PropertyList-1.0.dtd\"> <plist version=\"1.0\"> <dict> <key>CMIOExtension</key> <dict> <key>CMIOExtensionMachServiceName</key> <string>$(TeamIdentifierPrefix)$(PRODUCT_BUNDLE_IDENTIFIER)</string> </dict> </dict> </plist> And the entitlements file for the app: <?xml version=\"1.0\" encoding=\"UTF-8\"?> <!DOCTYPE plist PUBLIC \"-//Apple//DTD PLIST 1.0//EN\" \"http://www.apple.com/DTDs/PropertyList-1.0.dtd\"> <plist version=\"1.0\"> <dict> <key>com.apple.developer.system-extension.install</key> <true/> <key>com.apple.security.app-sandbox</key> <true/> <key>com.apple.security.application-groups</key> <array> <string>com.yealink.meeting.app</string> </array> <key>com.apple.security.device.camera</key> <true/> <key>com.apple.security.device.microphone</key> <true/> <key>com.apple.security.device.usb</key> <true/> <key>com.apple.security.network.client</key> <true/> <key>com.apple.security.network.server</key> <true/> <key>com.apple.security.personal-information.location</key> <true/> </dict> </plist> I'm looking forward to your response.

I create a camera extension and App can push video data to camera extension with sinkStream. I want to monitor the number of clients connected to the camera extension and close the app's push stream when the number of connected client is zero.