title: How can I determine the CODECS value for a m3u8 playlist?
body: <p>I am creating a master m3u8 file to allow adaptive streaming of two streaming videos. Both have the readable codec name MPEG-4 AVC (part 10) (avc1)</p>
  <p>How can I translate this into the CODECS value that should appear in my master m3u8 playlist file, as in this example:</p>
  <p><code>#EXT-X-STREAM-INF:PROGRAM-ID=1,BANDWIDTH=1755600,CODECS=&quot;avc1.42001f,mp4a.40.2&quot;,RESOLUTION=354x240</code></p>
  <p>How do I get the value to replace <code>avc1.42001f,mp4a.40.2</code></p>
  <p>Apple's specs say &quot;Valid format identifiers are those in the ISO file format name space defined by RFC 6381 [RFC6381]&quot; but I have no idea how to read the RFC 6381 documentation.</p>