Hi David, The RFC-6051 seems good for quickly synchronization, but it requires a big effort to adapt to the current library and I am not sure if it is worth enough to do so. I don't understand your issue well so I have no idea. Sorry.
Steve. On Fri, Jan 22, 2021 at 8:44 PM David Gessel <ges...@blackrosetech.com> wrote: > Steve, > > I am having some issues with sync due to either late or ignored SR packet > timestamps. Ross provided a really good answer to my question - to which I > owe a response and am working toward (side-quests have intervened as a > kernel update once again broke my e1000e network driver and this time the > fixes are not fixin' the problem - totally irrelevant to this). > > In any event there is a standard defined to extend the RTP packet > structure to include NTP time stamps, RFC 6051, precisely to enable more > rapid synchronization of multi-source RTSP streams. I feel Live555 would > benefit from at least having the capability of optionally adding RFC6051 > NTP header extensions. > > -David > > > > -------- Original Message -------- > Subject: Re: [Live-devel] Delay problem of the first RTCP "SR" packet > From: Ross Finlayson <finlay...@live555.com> > To: LIVE555 Streaming Media - development & use <live-de...@us.live555.com > > > Date: 2021-01-22 10:01+0300 > > > > > > >> On Jan 22, 2021, at 4:05 PM, Steve Ha <stev...@u2sr.com> wrote: > >> > >> My question is how can I force the first RTCP "SR" packet to be > delivered at the same time as the first RTP packet so that the RTSP client > could get all frames with correct PTS? > > > > Basically, you can’t. (But even if you could, there’d be no guarantee > that it would be received, as it (like all RTCP (and RTP packets) are > datagrams.) > > > > However, our RTSP server implementation *does* send an initial RTCP > “SR”, before the first RTP packet, precisely for this reason. (See > “OnDemandServerMediaSubsession.cpp”, line 550.) > > > > > > Ross Finlayson > > Live Networks, Inc. > > http://www.live555.com/ > > > > > > _______________________________________________ > > live-devel mailing list > > live-devel@lists.live555.com > > http://lists.live555.com/mailman/listinfo/live-devel > > > _______________________________________________ > live-devel mailing list > live-devel@lists.live555.com > http://lists.live555.com/mailman/listinfo/live-devel >
_______________________________________________ live-devel mailing list live-devel@lists.live555.com http://lists.live555.com/mailman/listinfo/live-devel
