RE: [AVT] Generic RTP payload format for time-lined static media
Jonathan Rosenberg <jdrosen@dynamicsoft.com> Wed, 18 July 2001 19:01 UTC
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From: Jonathan Rosenberg <jdrosen@dynamicsoft.com>
To: 'Magnus Westerlund' <magnus.westerlund@era-t.ericsson.se>, avt@ietf.org
Subject: RE: [AVT] Generic RTP payload format for time-lined static media
Date: Wed, 18 Jul 2001 15:01:45 -0400
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First off, I must admit I didn't follow the threads on this draft till now, so if my issues were covered already, my apologies. Honestly, I don't understand why the content is transferred within the RTP at all. Unlike continuous media, which has the property that old data is not useful if it comes too late, the timescales for this stuff are such that its still useful if you can get it before it no longer needs to be presented, which is probably on the order of several seconds for most everything, at least. So, why don't you send RTP packets that contain a URL for the content? I think you're better off fetching a JPEG using http than trying to stream one in RTP. Beyond that, I would think this would work like rfc2833 does, in terms of conveying durations/timestamps. Thanks, Jonathan R. --- Jonathan D. Rosenberg, Ph.D. 72 Eagle Rock Ave. Chief Scientist First Floor dynamicsoft East Hanover, NJ 07936 jdrosen@dynamicsoft.com FAX: (973) 952-5050 http://www.jdrosen.net PHONE: (973) 952-5000 http://www.dynamicsoft.com > -----Original Message----- > From: Magnus Westerlund [mailto:magnus.westerlund@era-t.ericsson.se] > Sent: Friday, July 13, 2001 10:18 AM > To: avt@ietf.org > Subject: [AVT] Generic RTP payload format for time-lined static media > > > Hi, > > I have submitted a new draft with the title: Generic RTP > payload format > for time-lined static media. > The abstract reads > > This Internet Draft discusses an RTP payload format for time-lined > static media. "Time-lined static media" means static media objects > like pictures and text extended by timing information. Applications > that would benefit from such a payload format are for instance > slideshow streaming and streaming of subtitled video and audio. We > discuss the important requirements for a payload format > and propose a > > specification that suits those requirements. > > Untill the draft is available in the IETF directory you can find it > here: > http://standards.ericsson.net/westerlund/draft-westerlund-avt- rtp-static-media-00.txt Please read the draft and comment on it. I also hope to have the possiblity to present and discuss it in London. Regards Magnus Westerlund Audio Technology, Ericsson Research ---------------------------------------------------------------------- Ericsson Radio Systems AB | Phone +46 8 4048287 Torshamsgatan 23 | Fax +46 8 7575550 S-164 80 Stockholm, Sweden | mailto: magnus.westerlund@era-t.ericsson.se _______________________________________________ Audio/Video Transport Working Group avt@ietf.org http://www.ietf.org/mailman/listinfo/avt _______________________________________________ Audio/Video Transport Working Group avt@ietf.org http://www.ietf.org/mailman/listinfo/avt
- [AVT] Generic RTP payload format for time-lined s… Magnus Westerlund
- Re: [AVT] Generic RTP payload format for time-lin… Ross Finlayson
- Re: [AVT] Generic RTP payload format for time-lin… Magnus Westerlund
- Re: [AVT] Generic RTP payload format for time-lin… Ross Finlayson
- Re: [AVT] Generic RTP payload format for time-lin… Magnus Westerlund
- Re: [AVT] Generic RTP payload format for time-lin… Ross Finlayson
- RE: [AVT] Generic RTP payload format for time-lin… Jonathan Rosenberg
- RE: [AVT] Generic RTP payload format for time-lin… Ross Finlayson