Hi;
yes, correct. Yuo will send paquets marked with payload 97, and ready to
receive wit payload 96.
Erez Morabia wrote:
Hi,
So, if I understand you right, it means that the list of video media
format numbers indicate only which payload type should be in the
incoming RTP payloads.
In such case, if I sent the below offer, then the other side can send an
answer with:
m=video 6794 RTP/AVP 97
a=rtpmap:97 H263-2000/90000
a=sendrecv
....and this means the other side accepted my offer, but it want to
receive the RTP with payload 97.
Is that correct?
Thanks,
Erez
-----Original Message-----
From: Diego B [mailto:[EMAIL PROTECTED]
Sent: Monday, January 23, 2006 2:23 PM
To: Erez Morabia
Cc: Even, Roni; [email protected]
Subject: Re: [Sip-implementors] Asymmetric media format
Hi;
This is your offer, or answer,and it states where ae you ready to
receive packets for payload 96
The other side maybe has statically configured payload types and 96 is
used for some other media ( DTMF maybe ).
Regards
Erez Morabia wrote:
I see. Thanks.
I have another question in the same area.
If I send the following offer:
m=video 6794 RTP/AVP 96
a=rtpmap:96 H263-2000/90000
a=sendrecv
Does it mean that the dynamic payload 96 should be used in RTP for both
directions?
Is it possible to use different payload type for each direction? If
yes, how do I indicate that in the offer/answer SDP model?
Thanks,
Erez
________________________________________
From: Even, Roni [mailto:[EMAIL PROTECTED]
Sent: Tuesday, January 17, 2006 10:38 AM
To: Erez Morabia; [email protected]
Subject: RE: [Sip-implementors] Asymmetric media format
Hi,
For the b= qualifier look in
http://www.ietf.org/internet-drafts/draft-ietf-mmusic-sdp-new-25.txt
and
http://www.ietf.org/rfc/rfc3890.txt
The current H.261 draft is
http://www.ietf.org/internet-drafts/draft-ietf-avt-rfc2032-bis-11.txt
Roni Even
-----Original Message-----
From: Erez Morabia [mailto:[EMAIL PROTECTED]
Sent: Tuesday, January 17, 2006 10:34 AM
To: Even, Roni; [email protected]
Subject: RE: [Sip-implementors] Asymmetric media format
Hi,
I have looked into RFC 4317 (SDP Offer/Answer Examples), but I could
not
find example related to this issue.
I know that some vendors do use the MaxBR field. Where can I find the
payload specification?
Thanks,
Erez
-----Original Message-----
From: Even, Roni [mailto:[EMAIL PROTECTED]
Sent: Tuesday, January 17, 2006 9:51 AM
To: Erez Morabia; [email protected]
Subject: RE: [Sip-implementors] Asymmetric media format
Hi,
I think it is OK.
The problem I see is with the MaxBR field. I am not aware that it is in
the payload specification.
You should use b=AS:440 or b=TIAS:440000 for each m line
Roni Even
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Erez
Morabia
Sent: Tuesday, January 17, 2006 8:23 AM
To: [email protected]
Subject: [Sip-implementors] Asymmetric media format
Hi,
Suppose I want to announce different format parameters for the receive
direction and for the transmit direction.
For example,
Receive : QCIF, 110Kbps, 15fps
Transmit: CIF, 440Kbps, 30fps
Is there a way for doing it?
The only thing I can think of is:
m=video 6794 RTP/AVP 31
a=rtpmap:31 H261/90000
a=fmtp:31 CIF=1/MaxBR=4400
a=sendonly
m=video 6794 RTP/AVP 31
a=rtpmap:31 H261/90000
a=fmtp:31 QCIF=2/MaxBR=1100
a=recvonly
Thanks,
Erez
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Regards,
Diego B (:-:)
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