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 _______________________________________________ Sip-implementors mailing list [email protected] https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors _______________________________________________ Sip-implementors mailing list [email protected] https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
