is amf0 still used? Is there any backward compatibility for amf0 in amf3?

Question

Is amf0 still used ?

Is there any backward compatibility for amf0 in amf3?

Which encoding does the current version of Adobe flex use---amf0 or amf3?

Answer 1

amf0 is for as2. amf3 is for amf3, though you can switch to amf0 if needed.

So amf0 is seldom used

yes, there is backward compatibility

flex uses amf3.

Answer 2

As of 2015, AMF0 is still widely used as the metadata format for FLV files.

While the MPEG-4 Part 14 (or simply MP4) file format has largely superseded FLV for most workflows, it is still used when publishing live video to RTMP servers like Adobe Media Server, Wowza, or nginx-rtmp.

It is therefore used in FLV events that are handled by NetStream instances, like this:

netStream.onMetaData = function(myMeta) { 
  for (var i in myMeta) { 
      trace(i + ":\t" + myMeta[i]) 
  } 
};