Re: [AVTCORE] I-D Action: draft-ietf-avtext-framemarking-08.txt
"Mo Zanaty (mzanaty)" <mzanaty@cisco.com> Thu, 28 March 2019 21:53 UTC
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From: "Mo Zanaty (mzanaty)" <mzanaty@cisco.com>
To: Magnus Westerlund <magnus.westerlund@ericsson.com>
CC: "avt@ietf.org" <avt@ietf.org>, "draft-ietf-avtext-framemarking@ietf.org" <draft-ietf-avtext-framemarking@ietf.org>
Thread-Topic: [AVTCORE] I-D Action: draft-ietf-avtext-framemarking-08.txt
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Date: Thu, 28 Mar 2019 21:53:48 +0000
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Subject: Re: [AVTCORE] I-D Action: draft-ietf-avtext-framemarking-08.txt
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Hi Magnus, Version 09 addresses your two issues below. Please review and confirm if this resolves all your issues. https://www.ietf.org/rfcdiff?url2=draft-ietf-avtext-framemarking-09 Thanks, Mo -----Original Message----- From: mzanaty <mzanaty@cisco.com> Date: Friday, November 9, 2018 at 4:25 PM To: 'Magnus Westerlund' <magnus.westerlund@ericsson.com>, "avt@ietf.org" <avt@ietf.org>, "draft-ietf-avtext-framemarking@ietf.org" <draft-ietf-avtext-framemarking@ietf.org> Subject: Re: [AVTCORE] I-D Action: draft-ietf-avtext-framemarking-08.txt Resent-From: <alias-bounces@ietf.org> Resent-To: mzanaty <mzanaty@cisco.com>, Espen Berger <espeberg@cisco.com>, <snandaku@cisco.com> Resent-Date: Friday, November 9, 2018 at 4:25 PM Hi Magnus, For clarity, we will add diagrams for the long header format when any fields are omitted. (L=1 when TL0PICIDX is omitted, and L=0 when both LID and TL0PICIDX are omitted). Thanks, Mo -----Original Message----- From: avt <avt-bounces@ietf.org> on behalf of 'Magnus Westerlund' <magnus.westerlund@ericsson.com> Date: Tuesday, November 6, 2018 at 2:49 AM To: "avt@ietf.org" <avt@ietf.org>, "draft-ietf-avtext-framemarking@ietf.org" <draft-ietf-avtext-framemarking@ietf.org> Subject: Re: [AVTCORE] I-D Action: draft-ietf-avtext-framemarking-08.txt Hi, I have reviewed the changes and have some comments below. Otherwise thanks for addressing my comments. 1. Section 3.1: Note that this SHOULD match the RTP header marker bit when the latter is reliable. So, should this really be a capital SHOULD? First it appears to be an informative note. Secondly, video payload formats has so far used the marker bit to indicate last packet of a frame/field (for interleaved). But, that doesn't preclude that a future format would depart from the convention. Thus, some rewording may be suitable. 2. Section 3.2 One issue was not resolved from my previous comment: The ID is assigned per [RFC8285], and the length is encoded as L=2 which indicates 3 octets of data. 0 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | ID=? | L=2 |S|E|I|D|B| TID | LID | TL0PICIDX | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ o LID: Layer ID (8 bits) - Identifies the spatial and quality layer encoded, starting with 0 and increasing with higher fidelity. If no scalability is used, this MUST be 0 or omitted to reduce length. When omitted, TL0PICIDX MUST also be omitted. The issue I see with the LID text is that they it says that the LID field and the TL0PICIDX can be omitted, and thus have a shorter header. To allow for this, one need to change the upper part for the long header and the allowed values for the L field can be either 0 or 2. Cheers Magnus On 2018-10-24 02:19, internet-drafts@ietf.org wrote: > A New Internet-Draft is available from the on-line Internet-Drafts >directories. > This draft is a work item of the Audio/Video Transport Core Maintenance >WG of the IETF. > > Title : Frame Marking RTP Header Extension > Authors : Mo Zanaty > Espen Berger > Suhas Nandakumar > Filename : draft-ietf-avtext-framemarking-08.txt > Pages : 12 > Date : 2018-10-23 > > Abstract: > This document describes a Frame Marking RTP header extension used to > convey information about video frames that is critical for error > recovery and packet forwarding in RTP middleboxes or network nodes. > It is most useful when media is encrypted, and essential when the > middlebox or node has no access to the media decryption keys. It is > also useful for codec-agnostic processing of encrypted or unencrypted > media, while it also supports extensions for codec-specific > information. > > > The IETF datatracker status page for this draft is: > https://datatracker.ietf.org/doc/draft-ietf-avtext-framemarking/ > > There are also htmlized versions available at: > https://tools.ietf.org/html/draft-ietf-avtext-framemarking-08 > https://datatracker.ietf.org/doc/html/draft-ietf-avtext-framemarking-08 > > A diff from the previous version is available at: > https://www.ietf.org/rfcdiff?url2=draft-ietf-avtext-framemarking-08 > > > Please note that it may take a couple of minutes from the time of >submission > until the htmlized version and diff are available at tools.ietf.org. > > Internet-Drafts are also available by anonymous FTP at: > ftp://ftp.ietf.org/internet-drafts/ > > _______________________________________________ > Audio/Video Transport Core Maintenance > avt@ietf.org > https://www.ietf.org/mailman/listinfo/avt > -- Magnus Westerlund ---------------------------------------------------------------------- Network Architecture & Protocols, Ericsson Research ---------------------------------------------------------------------- Ericsson AB | Phone +46 10 7148287 Torshamnsgatan 23 | Mobile +46 73 0949079 SE-164 80 Stockholm, Sweden | mailto: magnus.westerlund@ericsson.com ---------------------------------------------------------------------- _______________________________________________ Audio/Video Transport Core Maintenance avt@ietf.org https://www.ietf.org/mailman/listinfo/avt
- [AVTCORE] I-D Action: draft-ietf-avtext-framemark… internet-drafts
- Re: [AVTCORE] I-D Action: draft-ietf-avtext-frame… Magnus Westerlund
- Re: [AVTCORE] I-D Action: draft-ietf-avtext-frame… Mo Zanaty (mzanaty)
- Re: [AVTCORE] I-D Action: draft-ietf-avtext-frame… Mo Zanaty (mzanaty)
- Re: [AVTCORE] I-D Action: draft-ietf-avtext-frame… Mo Zanaty (mzanaty)
- Re: [AVTCORE] I-D Action: draft-ietf-avtext-frame… Magnus Westerlund
- Re: [AVTCORE] I-D Action: draft-ietf-avtext-frame… Dale R. Worley
- Re: [AVTCORE] I-D Action: draft-ietf-avtext-frame… Jonathan Lennox
- Re: [AVTCORE] I-D Action: draft-ietf-avtext-frame… Magnus Westerlund
- Re: [AVTCORE] I-D Action: draft-ietf-avtext-frame… Mo Zanaty (mzanaty)
- Re: [AVTCORE] I-D Action: draft-ietf-avtext-frame… Dale R. Worley
- Re: [AVTCORE] I-D Action: draft-ietf-avtext-frame… Dale R. Worley
- Re: [AVTCORE] I-D Action: draft-ietf-avtext-frame… Dale R. Worley
- Re: [AVTCORE] I-D Action: draft-ietf-avtext-frame… Mo Zanaty (mzanaty)