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Re: [rtcweb] [MMUSIC] m-line recycling

Justin Uberti <juberti@google.com> Mon, 19 May 2014 12:38 UTC

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From: Justin Uberti <juberti@google.com>
Date: Mon, 19 May 2014 05:37:36 -0700
Message-ID: <CAOJ7v-0n6nrfYrbO-QuA0Fw17Su1Xkw11AUszi5VtbecbmfyXg@mail.gmail.com>
To: Christer Holmberg <christer.holmberg@ericsson.com>
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Cc: "rtcweb@ietf.org" <rtcweb@ietf.org>, mmusic WG <mmusic@ietf.org>
Subject: Re: [rtcweb] [MMUSIC] m-line recycling
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yes


On Sun, May 18, 2014 at 9:49 PM, Christer Holmberg <
christer.holmberg@ericsson.com> wrote:

>
>
> Hi,
>
>
>
> >One option could be to only reuse m= lines that both sides have stopped
> using (i.e. port=0, as >opposed to a=sendonly/recvonly). This provides
> most of the benefits of recycling without >having to deal with the notion
> of 'compatible'.
>
>
>
> Are you suggesting a MUST reuse such m= line, if available?
>
>
>
> Regards,
>
>
>
> Christer
>
>
>
> On Mon, May 12, 2014 at 7:43 AM, Martin Thomson <martin.thomson@gmail.com>
> wrote:
>
> Yes, some words about being compatible and all that entails are required
> if we intend to stipulate it being reused. Either that or we can say MAY.
> The need for a strong definition diminishes then.
>
> On May 11, 2014 11:54 PM, "Christer Holmberg" <
> christer.holmberg@ericsson.com> wrote:
>
>   Hi,
>
>
>
> I don’t think it should be a MUST – at least not only based on the media
> type. Because, there may be other properties than the media type associated
> with the “m=” line, why one does not want to use it for the specific MST.
>
>
>
> Regards,
>
>
>
> Christer
>
>
>
>
>
>
>
> *From:* mmusic [mailto:mmusic-bounces@ietf.org] *On Behalf Of *Eric
> Rescorla
> *Sent:* 12. toukokuuta 2014 7:50
> *To:* mmusic WG; rtcweb@ietf.org
> *Subject:* [MMUSIC] m-line recycling
>
>
>
> The JSEP spec specifies m-line recycling:
>
>
>
>
>
>
>
>  o  If any MediaStreamTracks have been added, and there exist m=
>
>       sections of the appropriate media type with no associated
>
>       MediaStreamTracks (i.e. as described in the preceding paragraph),
>
>       those m= sections MUST be recycled by adding the new
>
>       MediaStreamTrack to the m= section.  This is done by adding the
>
>       necessary "a=msid", "a=ssrc", and "a=ssrc-group" lines to the
>
>       recycled m= section, and removing the "a=recvonly" attribute.
>
> Based on the minutes from IETF 89, we were going to take this to mmusic.
>
> http://etherpad.tools.ietf.org:9000/p/notes-ietf-89-rtcweb?useMonospaceFont=true
>
>
>
>
>
>
>
>
>
> Thoughts?
>
> -Ekr
>
>
>
> https://github.com/rtcweb-wg/jsep/issues/21
>
>
>
> _______________________________________________
> rtcweb mailing list
> rtcweb@ietf.org
> https://www.ietf.org/mailman/listinfo/rtcweb
>
>
> _______________________________________________
> mmusic mailing list
> mmusic@ietf.org
> https://www.ietf.org/mailman/listinfo/mmusic
>
>
>

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