RTP dynamic bitrate depending on network condition

[vk_gst]

Nicolas Dufresne-5 wrote
> Le mercredi 20 février 2019 à 07:45 -0600, vk_gst a écrit :
>> Hi Justin,
>> 
>> You can try accessing the sender report at the sender side, and get an
>> idea
>> about the bandwidth by accessing the following fields : 
> 
> Or just read the estimated bandwidth found in the stats. Something
> closer to REMB would be to also use the variation of the round-trip-
> time to do early detection of the remote queues filling.
> 
>   RTPSource of main RTP SSRC: see bitrate in stats structure
>   RTPSource of the RTCP SSRC: see rb-round-trip in stats structure
> 
> You should increase the RTCP interval, as the default of 5s is not very
> reactive for this type of measurement.
> 
> Is there any property exposed by element rtpbin, that enables to change
> this time of 5seconds. I could not find any. 
> 
>> 
>> >                 SSRC_1 (SSRC of first source)                 | report
>> +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ block
>> > fraction lost |       cumulative number of packets lost       |   1
>> -+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
>> >           extended highest sequence number received           |
>> +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
>> >                      interarrival jitter                      |
>> +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
>> >                         last SR (LSR)                         |
>> +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
>> >                   delay since last SR (DLSR)                  |
>> 
>> You still have to write a logic on how you would estimate the bandwidth
>> based on these parameters.
>> 
>> Have a look  here <https://www.freesoft.org/CIE/RFC/1889/19.htm>  .
>> 
>> Regards
>> 
>> 
>> 
>> --
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Nicolas Dufresne-5 wrote
> Le mercredi 20 février 2019 à 07:45 -0600, vk_gst a écrit :
>> Hi Justin,
>> 
>> You can try accessing the sender report at the sender side, and get an
>> idea
>> about the bandwidth by accessing the following fields : 
> 
> Or just read the estimated bandwidth found in the stats. Something
> closer to REMB would be to also use the variation of the round-trip-
> time to do early detection of the remote queues filling.
> 
>   RTPSource of main RTP SSRC: see bitrate in stats structure
>   RTPSource of the RTCP SSRC: see rb-round-trip in stats structure
> 
> You should increase the RTCP interval, as the default of 5s is not very
> reactive for this type of measurement.
> 
>> 
>> >                 SSRC_1 (SSRC of first source)                 | report
>> +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ block
>> > fraction lost |       cumulative number of packets lost       |   1
>> -+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
>> >           extended highest sequence number received           |
>> +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
>> >                      interarrival jitter                      |
>> +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
>> >                         last SR (LSR)                         |
>> +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
>> >                   delay since last SR (DLSR)                  |
>> 
>> You still have to write a logic on how you would estimate the bandwidth
>> based on these parameters.
>> 
>> Have a look  here <https://www.freesoft.org/CIE/RFC/1889/19.htm>  .
>> 
>> Regards
>> 
>> 
>> 
>> --
>> Sent from: http://gstreamer-devel.966125.n4.nabble.com/
>> _______________________________________________
>> gstreamer-devel mailing list
>> 

> gstreamer-devel at .freedesktop

>> https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel
> 
> _______________________________________________
> gstreamer-devel mailing list

> gstreamer-devel at .freedesktop

> https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel
> 
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