[FFmpeg-user] constant rtp stram

the... ttmgybta at gmail.com
Fri Feb 28 17:25:31 CET 2014


Yes it is always the case.

The log below is a part of the csv which I exported from the wireshark rtp
analyzer.

As you can see from Sequence 0 to 11 we have a delta from about 0.02ms the
244ms and the about 0.02 abayn and then 244ms...





"Packet","Sequence","Time stamp","Delta (ms)","Jitter (ms)","Skew(ms)","IP
BW (kbps)","Marker","Status"

"28","0","3893850368","0.00","0.00","0.00","1.60","","[ Ok ]","02/20/2014
16:17:57.511","214"

"29","1","3893850528","0.02","1.25","19.98","3.20","","[ Ok ]","02/20/2014
16:17:57.511","214"

"30","2","3893850688","0.03","2.42","39.95","4.80","","[ Ok ]","02/20/2014
16:17:57.511","214"

"31","3","3893850848","0.10","3.51","59.85","6.40","","[ Ok ]","02/20/2014
16:17:57.511","214"

"32","4","3893851008","0.02","4.54","79.83","8.00","","[ Ok ]","02/20/2014
16:17:57.511","214"

"33","5","3893851168","0.08","5.50","99.75","9.60","","[ Ok ]","02/20/2014
16:17:57.511","214"

"34","6","3893851328","0.05","6.41","119.70","11.20","","[ Ok
]","02/20/2014 16:17:57.511","214"

"35","7","3893851488","0.04","7.25","139.66","12.80","","[ Ok
]","02/20/2014 16:17:57.511","214"

"36","8","3893851648","0.08","8.04","159.59","14.40","","[ Ok
]","02/20/2014 16:17:57.511","214"

"37","9","3893851808","0.04","8.79","179.55","16.00","","[ Ok
]","02/20/2014 16:17:57.511","214"

"38","10","3893851968","0.06","9.49","199.48","17.60","","[ Ok
]","02/20/2014 16:17:57.511","214"

"39","11","3893852128","0.04","10.14","219.45","19.20","","[ Ok
]","02/20/2014 16:17:57.511","214"

"46","12","3893852288","244.30","23.53","-4.86","20.80","","[ Ok
]","02/20/2014 16:17:57.755","214"

"47","13","3893852448","0.05","23.30","15.09","22.40","","[ Ok
]","02/20/2014 16:17:57.755","214"

"48","14","3893852608","0.01","23.09","35.07","24.00","","[ Ok
]","02/20/2014 16:17:57.755","214"

"49","15","3893852768","0.08","22.90","54.99","25.60","","[ Ok
]","02/20/2014 16:17:57.756","214"

"50","16","3893852928","0.04","22.71","74.95","27.20","","[ Ok
]","02/20/2014 16:17:57.756","214"

"51","17","3893853088","0.07","22.54","94.89","28.80","","[ Ok
]","02/20/2014 16:17:57.756","214"

"52","18","3893853248","0.04","22.38","114.85","30.40","","[ Ok
]","02/20/2014 16:17:57.756","214"

"53","19","3893853408","0.07","22.23","134.78","32.00","","[ Ok
]","02/20/2014 16:17:57.756","214"

"54","20","3893853568","0.09","22.08","154.69","33.60","","[ Ok
]","02/20/2014 16:17:57.756","214"

"55","21","3893853728","0.04","21.95","174.65","35.20","","[ Ok
]","02/20/2014 16:17:57.756","214"

"56","22","3893853888","0.06","21.82","194.60","36.80","","[ Ok
]","02/20/2014 16:17:57.756","214"

"57","23","3893854048","0.04","21.71","214.56","38.40","","[ Ok
]","02/20/2014 16:17:57.756","214"

"58","24","3893854208","0.07","21.60","234.49","40.00","","[ Ok
]","02/20/2014 16:17:57.756","214"

"63","25","3893854368","255.35","34.96","-0.86","41.60","","[ Ok
]","02/20/2014 16:17:58.011","214"

"64","26","3893854528","0.05","34.02","19.09","43.20","","[ Ok
]","02/20/2014 16:17:58.011","214"

"65","27","3893854688","0.01","33.14","39.08","44.80","","[ Ok
]","02/20/2014 16:17:58.011","214"

"66","28","3893854848","0.07","32.32","59.01","46.40","","[ Ok
]","02/20/2014 16:17:58.012","214"

"67","29","3893855008","0.06","31.54","78.95","48.00","","[ Ok
]","02/20/2014 16:17:58.012","214"

"68","30","3893855168","0.06","30.82","98.89","49.60","","[ Ok
]","02/20/2014 16:17:58.012","214"

"69","31","3893855328","0.04","30.14","118.86","51.20","","[ Ok
]","02/20/2014 16:17:58.012","214"

"70","32","3893855488","0.08","29.50","138.78","52.80","","[ Ok
]","02/20/2014 16:17:58.012","214"

"71","33","3893855648","0.09","28.90","158.69","54.40","","[ Ok
]","02/20/2014 16:17:58.012","214"

"72","34","3893855808","0.04","28.34","178.65","56.00","","[ Ok
]","02/20/2014 16:17:58.012","214"

"73","35","3893855968","0.03","27.82","198.61","57.60","","[ Ok
]","02/20/2014 16:17:58.012","214"

"74","36","3893856128","0.10","27.32","218.51","59.20","","[ Ok
]","02/20/2014 16:17:58.012","214"

"75","37","3893856288","0.02","26.86","238.50","60.80","","[ Ok
]","02/20/2014 16:17:58.012","214"

"81","38","3893856448","255.38","39.90","3.12","62.40","","[ Ok
]","02/20/2014 16:17:58.267","214"


2014-02-28 17:02 GMT+01:00 Anshul <anshul.ffmpeg at gmail.com>:

>
>
> "the..." <ttmgybta at gmail.com> wrote:
> >We see in the tcpdump that when we stream a wav file
> >
> >*ffmpeg -analyzeduration 0 -re -i /tmp/test.wav -vol 512 -c g722 -ar
> >16000
> >-f rtp rtp://[destIP]:[destPort]*
> >
> >That the stream is sending in burst in to the wire.
> >
> >First about 12 packages in 0.6ms then about 144ms delta and then the
> >next
> >12 package in 0.6ms delta for about 144ms and so on...
> >
> >Is it possible to send the stream with a constant delta between the
> >packages?
> >
> >
> >Thanks
> >
> >Roman
> >_______________________________________________
> >ffmpeg-user mailing list
> >ffmpeg-user at ffmpeg.org
> >http://ffmpeg.org/mailman/listinfo/ffmpeg-user
>
> Is this case is allways same? i mean have you tried many times, because
> some time diffence in latency is by underlying operating system which have
> an unreliable network latency.
>
> -Anshul
> --
> Sent from my Android device with K-9 Mail. Please excuse my brevity.
> _______________________________________________
> ffmpeg-user mailing list
> ffmpeg-user at ffmpeg.org
> http://ffmpeg.org/mailman/listinfo/ffmpeg-user
>


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