Function VTCopyVideoDecoderExtensionProperties

pub unsafe extern "C-unwind" fn VTCopyVideoDecoderExtensionProperties(
    format_desc: &CMFormatDescription,
    media_extension_properties_out: NonNull<*const CFDictionary>,
) -> i32

Available on crate features VTUtilities and objc2-core-media only.

Returns information about the Media Extension video decoder required to decode the specified format.

If a Media Extension video decoder will be used to decode the specified format, this function will return information about the Media Extension that will be used.

Parameter formatDesc: The format description for the video format for which information is being requested.

Parameter mediaExtensionPropertiesOut: If a Media Extension video decoder will be used to decode the specified format, this pointer will return a dictionary with a set of properties describing the extension video decoder. The dictionary keys are VTExtensionPropertiesKey values.

Returns: If the function succeeds and a Media Extension video decoder will be used to decode this format, the return value will be noErr. If the function succeeds but a Media Extension video decoder will not be used to decode this format, the return value will be kVTCouldNotFindExtensionErr. Otherwise, the return value will be an error code describing the failure.