[MMUSIC] BUNDLE/SDP : ISSUE#1: Should BUNDLE allow/disallow PT sharing ??
Suhas Nandakumar <suhasietf@gmail.com> Tue, 22 October 2013 06:36 UTC
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Date: Mon, 21 Oct 2013 23:36:20 -0700
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From: Suhas Nandakumar <suhasietf@gmail.com>
To: mmusic WG <mmusic@ietf.org>
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Cc: Cullen Jennings <fluffy@cisco.com>, Harald Alvestrand <hta@google.com>, Christer Holmberg <christer.holmberg@ericsson.com>
Subject: [MMUSIC] BUNDLE/SDP : ISSUE#1: Should BUNDLE allow/disallow PT sharing ??
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Hello All Section 5.2 in the draft-nandakumar-mmusic-sdp-mux-attributes-05 defines one category of OPEN ISSUE that was raised while analyzing multiplexing behavior of RFC4855, RFC5583 attributes for example. As an example, let's consider the SDP Example (copied from the draft) // PTs are shared and have different feedback types a=group:BUNDLE audio video m=audio 3456 RTP/AVP 98 a=mid:audio a=rtpmap:98 iLBC/8000 a=rtcp-fb ack // Positive ACK m=video 3456 RTP/AVP 98 a=mid:video a=rtpmap:98 VP8/90000 a-rtcp-fb:98 nack rpsi // Nack ACK In the above case, PT 98 is repeated between the audio and video media lines. Audio media line has rtcp-fb ack and video media line has rtcp-fb nack. Since RTCP reporting happens per RTP Session, we can see the following high level questions : 0. Should this be allowed ? 1. What should be the expected behavior in this scenario ? 2. What category assignment makes sense in here - IDENTICAL or NORMAL ?? Cheers Suhas
- [MMUSIC] BUNDLE/SDP : ISSUE#1: Should BUNDLE allo… Suhas Nandakumar
- Re: [MMUSIC] BUNDLE/SDP : ISSUE#1: Should BUNDLE … Christer Holmberg
- Re: [MMUSIC] BUNDLE/SDP : ISSUE#1: Should BUNDLE … Christer Holmberg
- Re: [MMUSIC] BUNDLE/SDP : ISSUE#1: Should BUNDLE … Harald Alvestrand
- Re: [MMUSIC] BUNDLE/SDP : ISSUE#1: Should BUNDLE … Suhas Nandakumar
- Re: [MMUSIC] BUNDLE/SDP : ISSUE#1: Should BUNDLE … Harald Alvestrand