[Live-devel] Request Headers in RTSP:SPEED Speed-up Delivery

erick.van.rijk at philips.com erick.van.rijk at philips.com
Tue Nov 23 18:03:13 PST 2004

Ok, I've done some more reading into the SPEED header, and it "might" be 
usefull, except that it implies that all the DTS/CTS will be recomputed by 
the server. in order to let the player run the content at SPEEDx times the 
normal speed (SPEED is meant to add a VCR fast forward/backward function). 
Since the main reason of openRTSP is to record streams I doubt, this will 
be any use, except when you can rebuild the recieved content to the normal 

Oh well it was just a random thought... ;)

BTW where does the expression "red herring" come from? If I remember 
correctly herring is a fish, right?


Ross Finlayson <finlayson at live.com>
Sent by: 
live-devel-bounces at ns.live.com
2004-11-23 05:34 PM
Please respond to "LIVE.COM Streaming Media - development & use"
        To:     "LIVE.COM Streaming Media - development & use" 
<live-devel at ns.live.com>
        cc:     (bcc: Erick van Rijk/EHV/PDSL/PHILIPS)
        Subject:        Re: [Live-devel] Request Headers in RTSP:SPEED 
Speed-up Delivery

At 03:43 AM 11/23/04, you wrote:

>Hi All,
>I was wondering, is there a way to have openRTSP recieve the data faster 
>than normal time? Simmilar to Fast Start (HTTP/FTP delivery) but over 
>I found some information about this in the RTSP specs: Request Headers in 

>RTSP:    SPEED          Speed-up Delivery.
>But I'm not really clear on that on how I would increase the SPEED 
>variable using openRTSP.

Support for the (optional) RTSP "Speed:" header would need to be added to 
the "RTSPClient" class (which "openRTSP" and other RTSP client 

                 Ross Finlayson

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