Re: [MMUSIC] Replay in RTSP?
Ross Finlayson <finlayson@live555.com> Wed, 10 January 2024 21:22 UTC
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From: Ross Finlayson <finlayson@live555.com>
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Date: Thu, 11 Jan 2024 10:21:45 +1300
Cc: Josip Bodružić <josip.bodruzic@outlook.com>, mmusic@ietf.org
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To: "Dale R. Worley" <worley@ariadne.com>
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Subject: Re: [MMUSIC] Replay in RTSP?
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> On Jan 11, 2024, at 7:51 AM, Dale R. Worley <worley@ariadne.com> wrote: > > My belief is that the reason that RTSP does not have a "replay feature" > is that the general model of "media stream" does not have the concept > that the media is stored somewhere, and therefore there is no > pre-existing "beginning" return to and thus obtain again the stream > data that was previously obtained. That is, it is the media stream > source that defines the concept of a beginning point of a persistent > blob of stored media. (Or ending point, for that matter.) Yes, and the media server can specify - using a “a=range:” field in the media’s SDP description - the start and end times of the media. And a RTSP client can specify - with a “Range:” header in a “PLAY” command - the point in time that media should start (when it’s streamed). So while the OP is correct that there’s no specific “Replay” command in RTSP, there *is* a way for RTSP clients to request that stored media be played from a particular point in time. Ross Finlayson Live Networks, Inc. http://www.live555.com/
- [MMUSIC] Replay in RTSP? Josip Bodružić
- Re: [MMUSIC] Replay in RTSP? worley
- Re: [MMUSIC] Replay in RTSP? Ross Finlayson