Function VTCopyVideoEncoderList 

pub unsafe extern "C-unwind" fn VTCopyVideoEncoderList(
    options: Option<&CFDictionary>,
    list_of_video_encoders_out: NonNull<*const CFArray>,
) -> i32

Available on crate feature VTVideoEncoderList only.

Builds a list of available video encoders.

The caller must CFRelease the returned list.