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Re: [payload] Adam Roach's Discuss on draft-ietf-payload-rtp-ancillary-10: (with DISCUSS and COMMENT)

"Ali C. Begen" <ali.begen@networked.media> Wed, 18 October 2017 06:59 UTC

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From: "Ali C. Begen" <ali.begen@networked.media>
In-Reply-To: <F9B5BD43-660D-4EB0-A919-A5BA07F988BF@foxeg.com>
Date: Wed, 18 Oct 2017 09:59:47 +0300
Cc: The IESG <iesg@ietf.org>, "payload-chairs@ietf.org" <payload-chairs@ietf.org>, "payload@ietf.org" <payload@ietf.org>, Adam Roach <adam@nostrum.com>
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References: <150285025423.12514.106587665039751833.idtracker@ietfa.amsl.com> <3B259563-1075-4C41-A832-D7633C39173B@foxeg.com> <61440eb5-32c3-3696-be38-8dc7c4eaf72f@nostrum.com> <863974D7-E112-4794-AD4D-C39C99BD40C9@foxeg.com> <b601dc36-8aee-75db-7159-6d4d5b6e684e@nostrum.com> <F9B5BD43-660D-4EB0-A919-A5BA07F988BF@foxeg.com>
To: Thomas Edwards <Thomas.Edwards@fox.com>
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Subject: Re: [payload] Adam Roach's Discuss on draft-ietf-payload-rtp-ancillary-10: (with DISCUSS and COMMENT)
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Sounds good, I am glad we have an agreement.

-acbegen

> On Oct 18, 2017, at 3:34 AM, Thomas Edwards <Thomas.Edwards@fox.com> wrote:
> 
> After further discussion with Adam Roach, I am now convinced that “FID” grouping is appropriate.  Thus, I propose that Section 4.1 of the I-D be altered to state:
> 
> 4.1 Grouping ANC Streams with other Media Streams
> 
> To indicate the association of an ancillary data stream with a particular video stream, implementers MAY group the "m" lines together using Flow Identificaiton ("FID") semantics as defined in RFC 5888 [RFC5888].
> 
> A sample SDP mapping for grouping ANC data with RFC 4175 video is as follows:
> 
>      v=0
>      o=Al 123456 11 IN IP4 host.example.com
>      s=Professional Networked Media Test
>      i=A test of synchronized video and ANC data
>      t=0 0
>      a=group:FID V1 M1
>      m=video 50000 RTP/AVP 96
>      c=IN IP4 233.252.0.1/255
>      a=rtpmap:96 raw/90000
>      a=fmtp:96 sampling=YCbCr-4:2:2; width=1280; height=720; depth=10
>      a=mid:V1
>      m=video 50010 RTP/AVP 97
>      c=IN IP4 233.252.0.2/255
>      a=rtpmap:97 smpte291/90000
>      a=fmtp:97 DID_SDID={0x61,0x02};DID_SDID={0x41,0x05}
>      a=mid:M1    
> 
> -Thomas
>

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