Hi,
I think you missunderstood Ling's question.
Normally a user describes his RECEIVING capabilities in the SDP ("I am able to
receive these codecs on this port" etc etc etc). But, for MPEG-4, I believe
Ling's point was tha the fmtp attribute refered to actually describes a SENDING
capability (not related to whether the stream is sendrecv, sendonly, or
something else...).
Or, was it ME who missunderstood the question? :)
Regards,
Christer
-----Original Message-----
From: [EMAIL PROTECTED]
To: Ling, Fan; [email protected]
Sent: 4.11.2005 6:32
Subject: Re: [Sip-implementors] media description in SDP is for sender
orreceiver?
Hi,
RFC 3264 specifies sendonly, recvonly, sendrecv and
inactive attributes. UA can specify any of these
attributes according to it's preference. When no such
attribute is present, it is assumed that the stream is
"sendrecv" stream and whatever the encodings specified
applies to both sender and receiver side.
Regards
Somesh S. Shanbhag
--- "Ling, Fan" <[EMAIL PROTECTED]> wrote:
> Hi,
>
> The following SDP message describes a MPEG4 video
> bitstream:
>
>
>
> m=video 20000 RTP/AVP 98 34
>
> a=rtpmap:98 MP4V-ES/90000
>
> a=fmtp:98
>
profile-level-id=8;config=000001B008000001B5090000010000000120008440FA28
> 2C2090A21F
>
>
>
> Does this SDP message describes the sender encoder
> generated media
> settings or the required media settings on the
> receiver's encoder? Or
> both? Can some one point me to the proper RFCs? I
> believe this media
> settings is for the sender side, but I can't find
> definitely
> description in any RFCs.
>
> Thanks a lot
>
> Fan
>
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>
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>
-----------------------------------------
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BE NATURAL LIVE NATURAL.
-----------------------------------------
Somesh S. Shanbhag
Focus Area - VoIP Team (FA-VoIP)
Mascon Global Communication Technologies
Enterprise of Mascon Global Limited
#59/2, 100Ft Ring Road
Banashankari II stage
Bangalore-560070
Karnataka
INDIA
Website: http://www.masconit.com
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