[AVT] RTSP and negotiation about Codec's capabilities

[Shailendra.Singh at skyworksinc.com]

Hi,
        Could
some please clarify:
        With
RTSP as the control protocol for a streamed multimedia session, how does
the Server determine if the Player has the capability to decode the content
it receives? In other words, how does the Player specify the capabilities
of the codecs available with it?
        An
example might clarify the information I am looking for. Suppose the streamed
content contains a MPEG-4 video bitstream (Simple Profile and level L3).
Now the Server needs to check if the MPEG-4 video decoder available with
the Player has the capability to decode this bitstream or not. Conceptually,
it needs to query the Profile and Level supported by the MPEG-4 video decoder,
and that can help it decide whether the Player can decode this particular
MPEG-4 video bitstream or not.
        How
is this handled in a generic sense (the decoder could be a MP3 decoder,
MPEG-4 video decoder, AAC decoder ...) ? Is there standard set of parameters
about each codecâs capability that the Player would inform the Server
?

Thanks,
Shailendra
_______________________________________________
Audio/Video Transport Working Group
avt at ietf.org
https://www1.ietf.org/mailman/listinfo/avt