title: CVPixelBuffer vs. CVImageBuffer, and Buffers in general
body: <p>What's the difference between <a href="https://developer.apple.com/documentation/corevideo/cvimagebuffer-q40" rel="noreferrer">CVImageBuffer</a> which is returned by <code>CMSampleBufferGetmageBuffer</code> and <a href="https://developer.apple.com/documentation/corevideo/cvpixelbuffer-q2e" rel="noreferrer">CVPixelBuffer</a>? I just want to retrieve the image planes (RGBA) but I can't figure out how to retrieve this information from CVImageBuffer. I'm using Swift.</p>
  
  <p>Thanks.</p>