Hi, several weeks ago I reported a RTP-packet-lost issue and got fixed by Simon's help and that is because we didn't handle the KeepAlive-packet's SequenceNumber well, after that our soft-terminal works well with H.460.18/19 enabled by gnuGK. now in the multi-participants testing we got another issue: if there are more than 5 participants are sending 720P-H.264 video stream, then we find that gnuGK lost packets again, normally there is 1 packet-lost in about 1 minute for 5 participants(720P-H264); this cause our MCU to keep on sending FastUpdate request and cause video-frozen or video quality down. we are running gnuGK on a windows-box, will it be better if we run gnuGK on a linux-box? and do you have any performance testing document for how many 720P-H.264 video-stream could be support by one gnuGK? Thanks!
the gnuGK we are running now is: 3.5 GNUGK the PC on which our gnuGK is running is: Windows 7 Professional 64 bit I7 @ 3.4GHz 4GB Ram Regards, Bo Xu On Mon, Mar 3, 2014 at 3:18 PM, Bo Xu <boxuscie...@gmail.com> wrote: > Hello Simon, > > Thanks a lot! yes as you mentioned our issue does relate with > KeepAlive, the details are: our terminal use same series of RTP > SequenceNumber for both video packet and KeepAlive packet, so when gnuGK > relay this RTP channel the KeepAlive packet will not be send to our MCU and > thus the SequenceNumber received by MCU becomes not continued, in my > previous email I thought this is because gnuGK lost packet, actully gnuGK > doesn't lost packet. we are updating our terminal now to separate the > SequenceNumber of video packet and KeepAlive packet so the SequenceNumber > of video packet will always be continued, Thanks for help us find the > reason! > > Regards, > Bo Xu > > > > > > > > > Message: 6 > Date: Tue, 4 Mar 2014 00:43:07 +1000 > From: "Simon Horne" <s.ho...@spranto.com> > Subject: Re: [Openh323gk-users] a question about the RTP packet-lost > from gnuGK when H.460.18/29 enabled > To: "'GNU Gatekeeper Users'" <openh323gk-users@lists.sourceforge.net> > Message-ID: <019001cf36ee$e641c4e0$b2c54ea0$@spranto.com> > Content-Type: text/plain; charset="us-ascii" > > Bo > > I think this might be a red herring. I think the keepAlive packet which is > send 1 packet every 20 sec (which should be discarded) is being counted. > > Simon > > > From: Bo Xu [mailto:boxuscie...@gmail.com] > Sent: 04 March 2014 00:30 > To: openh323gk-users > Subject: [Openh323gk-users] a question about the RTP packet-lost from gnuGK > when H.460.18/29 enabled > Hi, > > we are using gnuGK with H.460.18/19 enabled to connect our MCU and our > software H.323 terminal, our gnuGK/MCU/terminal are in the same subnet in > our testing. we found gnuGK can relay the video RTP packets from MCU well, > but about every 20 second gnuGK will lost one packet from our terminal. I > have tested both 720P video and CIF video and they are same. > > we already increased the RtpHandlerNumber parameter(we ever tried to set it > up to 20), but it seems the packet-lost rate is always same(about every 20 > seconds lost one packet). > > I am working on this and I still didn't figure out why the packets from MCU > are never lost, only the packets from terminal are lost? I ever guess it > might be because that every 20 seconds the buffer is full, but I cannot > explain why both 720P and CIF video has the same packet-loast rate? ? > which > part of the gnuGK code I need to read? could you give me some clues for > this? Thanks! > > Regards, > Bo Xu >
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