I want to find out which AVCaptureDevice.Format are compatible with what AVVideoCodecType, so to enable or disable possible configurations in the app's UI. As of today, for example, 1080p @ 240 is not compatible with h264, nor is 4K@60. But, I know this because Apple's Camera configuration explains it so in the options to choose between "High Efficiency" and "Most Compatible".What is the sanctioned way to determine if a certain video format can be used with a certain codec?. The way I am thinking about is a bit convoluted. To find the video codecs compatible with a video format I need to: - Create and configure a AVCaptureSession - Add a AVCaptureVideoDataOutput to the video session - Set the AVCaptureDeviceInput's device active format. - Query the AVCaptureVideoDataOutput availableVideoCodecTypesForAssetWriter to obtain the supported codecs (h264, hevc, ...).On the iPhone 11, the wide angle alone camera supports 17 420f video formats. Do I need to loop through all of them in order to obtain the supported codecs (set active format, query for each) or is there a better way?Thanks!

I am trying to set the description of an image. The metadata tag necessary to add the description is of type alternateText. I create the child tag with the new description value: let childTag = CGImageMetadataTagCreate(identifier.section.namespace, identifier.section.prefix, "[x-default]" as CFString, .string, value as CFTypeRef) I then set the description tag like this: let parentTag = CGImageMetadataTagCreate(identifier.section.namespace, identifier.section.prefix, identifier.tagKey, .alternateText, [childTag] as CFTypeRef) let result = CGImageMetadataSetTagWithPath(metadata, nil, identifier.tagKey, parentTag) However, when I write the image file, I get a runtime error message and the operation fails: XMP Error: AltText array items must have an xml:lang qualifier So, I create the qualifier tag like this: let qualifierTag = CGImageMetadataTagCreate("http://www.w3.org/XML/1998/namespace" as CFString, "xml" as CFString, "lang" as CFString, .string, "x-default" as CFTypeRef) But I have not found a way to associate this qualifier tag to the child tag with the description value. What is the way to do it?

I am trying to deploy our first Core ML model through the dashboard at https://ml.developer.apple.com/. Immediately after I go into the site, I get a message that reads "Your request is invalid.". I click "+" to add a model collection, I enter a collection ID, a description and a single model ID and then tap on "Create". I get a message that reads "One of the fields was invalid.". I have tried changing the IDs and the description, but there is no way to make it work. I have been trying this for hours. Could you please guide me on how to make it work?