- RTC-Web - example.com

Fwd: I-D Action:draft-zong-httpstreaming-gap-analysis-01.txt
by Mark Nottingham 03 Nov '10

03 Nov '10

FYI. Probably not in-scope here because of the realtime aspect, but as I say, there seem to be lots of different people interested in this general area... Begin forwarded message: > Resent-From: ietf-http-wg(a)w3.org > From: Mark Nottingham <mnot(a)mnot.net> > Date: 3 November 2010 8:57:30 PM AEDT > To: HTTP Working Group <ietf-http-wg(a)w3.org>, zongning(a)huawei.com > Subject: Fwd: I-D Action:draft-zong-httpstreaming-gap-analysis-01.txt > archived-at: <http://www.w3.org/mid/12A744C7-1C13-4AD4-9947-DBBD8CBF81AC@mnot.net> > > I wanted to bring this draft to the attention of the list, as I think it's some of the better and more complete work I've seen in an area that seems to be interesting to a lot of people these days: > http://www.ietf.org/internet-drafts/draft-zong-httpstreaming-gap-analysis-0… > > My specific feedback: > > Overall this is comprehensive and helpful in moving the discussion forward. Please continue! > > It may be useful to further separate the "real-time" / "live" streaming case from others, as it most likely requires a different approach (as noted in the draft). If you're not already aware of it, you should have a look at the results of the Realtime Web workshop, as well as the ongoing discussion: <http://rtc-web.alvestrand.com/>. > > While it appears that all of the approaches you cover are compatible with "generic" HTTP, I wonder how compatible they are in the details. For example: > a) is it possible to serve video for each using only a "vanilla" HTTP server like Apache or IIS, without any extra modules or server-side scripts? Setting headers and serving files from the filesystem is fine, as is having a process that writes the files to the filesystem for you. > > b) how compatible is each approach with off-the-shelf HTTP caches? E.g., if there's significant variance in the URIs (because of dynamic parameters being passed in), it'll "bust" the cache and lower the hit rate. I know that most of them are not using HTTP range requests; it would be interesting to explore this a bit more. > > It would also be very helpful to see examples of the actual HTTP messages (with headers and bodies) used by the various approaches, to give a better idea of how they use the protocol. > > Regarding the lack of QoE improvement and monitoring (in "Challenges"), my interest is in what can be done by clients to minimise delay, quantify the quality of the connection, and adapt without coordination with the server. Adding server hints to responses would be helpful too, of course, but I suspect that a lot more can be done on the client side (perhaps without standardisation; documenting best practices may be enough). > > Cheers, > > > Begin forwarded message: > >> From: Internet-Drafts(a)ietf.org >> Date: 25 October 2010 10:00:02 PM AEDT >> To: i-d-announce(a)ietf.org >> Subject: I-D Action:draft-zong-httpstreaming-gap-analysis-01.txt >> Reply-To: internet-drafts(a)ietf.org >> >> A New Internet-Draft is available from the on-line Internet-Drafts directories. >> >> Title : Survey and Gap Analysis for HTTP Streaming Standards and Implementations >> Author(s) : N. Zong >> Filename : draft-zong-httpstreaming-gap-analysis-01.txt >> Pages : 23 >> Date : 2010-10-25 >> >> With the explosive growth of the Internet usage and increasing demand >> for multimedia information on the web, media delivery over Internet >> attract substantial attention from media industry. To meet above >> requirements, HTTP Streaming technology is designed and gradually >> plays an important role in recent years. Several leading Standard >> Development Organizations (SDOs) have been producing a series of >> technical specifications to define streaming over HTTP. Moreover, >> several companies have devoted to developing private HTTP-based media >> delivery platform to provide high quality, adaptive viewing >> experience to customers. Following a brief survey of existing HTTP >> streaming standards and implementations, this document gives a brief >> summary on these related work, analyzes the potential challenges >> especially from the network point of view, and lists the gap between >> existing work and possible working scope on the topic of HTTP >> streaming in IETF. >> >> A URL for this Internet-Draft is: >> http://www.ietf.org/internet-drafts/draft-zong-httpstreaming-gap-analysis-0… >> >> Internet-Drafts are also available by anonymous FTP at: >> ftp://ftp.ietf.org/internet-drafts/ >> >> Below is the data which will enable a MIME compliant mail reader >> implementation to automatically retrieve the ASCII version of the >> Internet-Draft. >> >> _______________________________________________ >> I-D-Announce mailing list >> I-D-Announce(a)ietf.org >> https://www.ietf.org/mailman/listinfo/i-d-announce >> Internet-Draft directories: http://www.ietf.org/shadow.html >> or ftp://ftp.ietf.org/ietf/1shadow-sites.txt > > -- > Mark Nottingham http://www.mnot.net/ > > > -- Mark Nottingham http://www.mnot.net/

2 1

List is now open
by Harald Alvestrand 25 Oct '10

25 Oct '10

Cullen (I think) has changed the permissions on the list, so that now everyone can subscribe, and the archives are open. If you know of people you think should be on the list, please ask them to subscribe! The two ways to subscribe: - Send "subscribe" to rtc-web-request(a)alvestrand.no, and do what the response says - Go to http://www.alvestrand.no/mailman/listinfo/rtc-web and follow instructions Let the discussions begin! Harald

10 28

Workshop report published
by Harald Alvestrand 21 Oct '10

21 Oct '10

I have addressed the comments received so far as far as I was able to, and have now published the report. I hope I did an adequate job. You will find it on the rtc-web.alvestrand.com site, with links to the Google Docs version and the PDF version of the report. Onwards! Harald

1 0

Re: [RTW] Meet-up at IETF Beijing?
by Ingemar Johansson S 21 Oct '10

21 Oct '10

Hi I will be in Beijing from Nov 6 to Nov 14 /Ingemar > > Message: 1 > Date: Wed, 20 Oct 2010 22:51:18 +0200 > From: Harald Alvestrand <hta(a)google.com> > To: rtc-web(a)alvestrand.no > Subject: [RTW] Meet-up at IETF Beijing? > Message-ID: > <AANLkTimjDnQ5pYBBu5LwjSh8CFAsc3j9ErHzMik=hfi-(a)mail.gmail.com> > Content-Type: text/plain; charset="utf-8" > > The IETF meeting in Beijing is both too close to host an > official RTC-Web get-together and too sparsely attended to > garner many of us, but still... > who is going to be there, and when should we try to get > together for an informal conversation about the next steps of work?

1 0

Workshop report, version one
by Harald Alvestrand 19 Oct '10

19 Oct '10

Enclosed (in PDF) is the first version of the RTC-Web workshop report. Comments to the list, please! Harald

5 6

Best way to get up to speed on RTC Web work so far?
by Dan York 17 Oct '10

17 Oct '10

Greetings! Glad to see so many familiar names involved with this initiative. For newcomers to the list now that it is open, what is the best way for us to come up to speed on the work so far? Is it to read the slides and info here? https://sites.google.com/a/alvestrand.com/rtc-web/agenda And what are the next steps the group is undertaking? i.e. how can we best get involved? Thanks, Dan -- Dan York, Director of Conversations Voxeo Corporation http://www.voxeo.com dyork(a)voxeo.com Phone: +1-407-455-5859 Skype: danyork Join the Voxeo conversation: Blogs: http://blogs.voxeo.com Twitter: http://twitter.com/voxeo Facebook: http://www.facebook.com/voxeo Personal: http://danyork.com http://twitter.com/danyork

3 2

Please verify participant list
by Harald Alvestrand 15 Oct '10

15 Oct '10

I have to ask all participants to take a look here: http://rtc-web.alvestrand.com/participants If you WERE at the workshop: Check that you're listed, that your name is spelled correctly, and that your affiliation is correct. If you were NOT at the workshop: Check that you're NOT listed by accident. If you look at the list and notice an error related to someone else, that is very helpful too! For any corrections: Email me! The list of participants is going to be included into the public report from the meting, so it is very good if it is correct. Harald

1 0

Slides are up on site
by Harald Alvestrand 08 Oct '10

08 Oct '10

I think I have captured most, if not all, the slides on this page: https://sites.google.com/a/alvestrand.com/rtc-web/slides Please check for errors! Harald

1 0

ICE tutorial materials
by Rosenberg, Jonathan 06 Oct '10

06 Oct '10

Here is a PPT deck summary: http://www.jdrosen.net/papers/ice-ietf-tutorial.pdf and a written version of it: http://isoc.org/wp/ietfjournal/?p=117 and the spec itself: http://tools.ietf.org/search/rfc5245 -Jonathan R. Jonathan D. Rosenberg, Ph.D. SkypeID: jdrosen Chief Technology Strategist Mobile: +1 (732) 766-2496 Skype SkypeIn: +1 (408) 465-0361 jdrosen(a)skype.net http://www.skype.com jdrosen(a)jdrosen.net http://www.jdrosen.net

1 0

Common editable document
by Harald Alvestrand 06 Oct '10

06 Oct '10

If Etherpad doesn't work for you, try this document: https://docs.google.com/document/edit?id=1MdMipLRhr-g5b3SDC5qWTtd8DU_LxLDxL…

1 0