[Live-devel] RTCP and synchronization

[Ross Finlayson]

>Ok, but I still don't get how the final recipient gets to know the
>*original* presentation time (which correspond to audio) if I generate a
>new one in the transcoder...

Each incoming frame (from your "RTPSource" object) has an accurate 
presentation time, which you know (because it's passed as a parameter 
to your "afterGetting...()" function).  If your transcoder works by 
translating each incoming frame into a corresponding new transcoded 
frame, then it should simply assign each transcoded frame the 
presentation time from its corresponding incoming frame.  (Note, 
though, that if the incoming frames contain B-frames, but the 
transcoded frames don't, then the sequence of transcoded frames will 
not exactly match the sequence of incoming frames, and you should 
reorder the presentation times accordingly.)

If, however, your transcoder does *not* work by translating each 
incoming frame into a corresponding new transcoded frame, then things 
are more complicated.

But in any case, you're on your own from now on...
-- 

Ross Finlayson
Live Networks, Inc.
http://www.live555.com/