Function VTCompressionSessionEncodeFrame 

pub unsafe extern "C" fn VTCompressionSessionEncodeFrame(
    session: VTCompressionSessionRef,
    imageBuffer: CVImageBufferRef,
    presentationTimeStamp: CMTime,
    duration: CMTime,
    frameProperties: CFDictionaryRef,
    sourceFrameRefcon: *mut c_void,
    infoFlagsOut: *mut VTEncodeInfoFlags,
) -> OSStatus