[Live-devel] Questions for "testOnDemandRTSPServer"

[Mike Yan]

How about MPEG-4 Transport Stream? Does "fast-forward" and "reverse"
commands work on MPEG-4 Transport Stream?


-----Original Message-----
From: live-devel-bounces at ns.live.com [mailto:live-devel-bounces at ns.live.com]
On Behalf Of Ross Finlayson
Sent: Friday, July 15, 2005 3:01 AM
To: LIVE.COM Streaming Media - development & use
Subject: Re: [Live-devel] Questions for "testOnDemandRTSPServer"


>One simple question, does On Demand RTSP Server support commands like
>"Back-Forword", Fast-Forward, PAUSE, SEEK". I know currently the "Play" and
>"Stop" commands works.

"PAUSE" also works.  (However, VLC currently doesn't always send the RTSP 
"PAUSE" request when the 'pause' GUI button is clicked; I'm not sure why.)

However, the implementation of the other operations (seek, fast-forward, 
reverse play) is necessarily media-type dependent, and they are not all 
implemented for all media types.  In particular, seeking is currently 
implemented only for MPEG-1 or 2 audio (including MP3) and (although not 
well) for MPEG-1 or 2 Program Streams.  Fast forward is currently 
implemented only for MPEG-1 or 2 audio (including MP3) and WAV (PCM) 
audio.  Reverse play is currently implemented only for WAV (PCM) audio.

These operations will likely be implemented for more media types in the 
future, but for many media types, they are difficult to implement.


	Ross Finlayson
	LIVE.COM
	<http://www.live.com/>

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