Uses to reduce latency of a pipeline

[Jack]

Hello Nicolas,

Le 29/01/2019 à 17:46, Nicolas Dufresne a écrit :
> Le lundi 28 janvier 2019 à 13:04 +0100, Jack a écrit :
>> Hello,
>>
>> I would like to know if you have recommandations on how to reduce
>> latency on a running pipeline using gstwebrtc ?
>>
>> For instance, a pipeline 1 like (using Python) :
>>
>> webrtcbin name=sendrecv bundle-policy=max-bundle
> 
> You can configured the jitterbuffer latency using child proxy
> properties. But default it's 200ms (rtpbin latency property is in ms),
> this example would be 20ms:
> 
>   webrtcbin rtpbin::latency=20


If you can develop a little bit more your answer or give me a url with
an example or explanation I will be fine :)

Why using your solution on the first pipeline, which is working fine,
will solve my problem on the second pipeline ?
Thanx.
++

Jack



> 
>> filesrc location=my_stereo_sound.wav ! wavparse ! volume name="vol0"
>> volume=0.5 ! opusenc frame-size=10 ! rtpopuspay pt=96 !
>> application/x-rtp,media=audio,encoding-name=OPUS,payload=96,clock-rate=48000
>> ! sendrecv.
>>
>> and a pipeline 2 like (always with Python) :
>>
>> webrtcbin name=sendrecv bundle-policy=max-bundle
>> filesrc location=my_stereo_sound.wav ! wavparse ! deinterleave name=d
>> d.src_0 ! queue ! volume name="vol0" volume=0.5 ! i.sink_0 d.src_1 !
>> queue ! volume name="vol1" volume=0.5 ! i.sink_1 interleave name=i !
>> audiopanorama ! opusenc frame-size=10 ! rtpopuspay pt=96 !
>> application/x-rtp,media=audio,encoding-name=OPUS,payload=96,clock-rate=48000
>> ! sendrecv.
>>
>> If I change dynamically the value on "vol0" on the first pipeline (with
>> set_property()), I can hear the modification 1 second later (for me it
>> is acceptable). But if I do the same on the pipeline 2, the modification
>> is heard 2 seconds later ! Huge difference ! It is normal regarding the
>> "complexity" of the second pipeline (compare to the first) ? What do you
>> advise to reduce latency on the second pipeline ?
>> ++
>>
>> Jack
>>
>> _______________________________________________
>> gstreamer-devel mailing list
>> gstreamer-devel at lists.freedesktop.org
>> https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel
>>
>> _______________________________________________
>> gstreamer-devel mailing list
>> gstreamer-devel at lists.freedesktop.org
>> https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel


-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 484 bytes
Desc: OpenPGP digital signature
URL: <https://lists.freedesktop.org/archives/gstreamer-devel/attachments/20190130/c6ea8605/attachment.sig>