webrtcdsp and webrtcechoprobe on Windows

[Nicolas Dufresne]

Le jeudi 18 juin 2020 à 16:29 -0500, Attila a écrit :
> Thanks for your suggestions Nicolas! I have made some changes based on them,
> but I still have problems.
> 
> First a general question: I have only one audio channel (recording from the
> webcam). What does converting from interleaved to non-interleaved does in
> this context?

It add the audio meta.

> 
> After swithching to floats for the dsp and removing the queue, my local echo
> loop now works reasonably well on one computer (not perfect but it's
> definitely cutting out most echoes). However when I tried on another less
> powerful but still modern laptop it sounded like an echo chamber. The script
> looks like this now:
> 
> wasapisrc buffer-time=60000 ! audioconvert ! audio/x-raw,
> layout=non-interleaved ! webrtcdsp noise-suppression-level=high
> echo-suppression-level=high ! audioconvert ! webrtcechoprobe ! audioconvert
> ! wasapisink low-latency=true

I would copy the buffer-time configuration on the sink too, as this is the one
introduce large latency by default (200ms).

> 
> For my complete script below, I now use floats for the dsp and moved the
> queue after it. This is also an echo chamber, but since one of the computers
> I'm using doesn't work with the local loop, this might be expected...
> 
>   wasapisrc buffer-time=60000 ! audioconvert ! audio/x-raw,
> layout=non-interleaved ! webrtcdsp noise-suppression-level=high
> echo-suppression-level=high^
>     ! queue ! audioconvert ! audio/x-raw, format=S16LE ! opusenc
> audio-type=2048 bitrate=24000 inband-fec=true packet-loss-percentage=5 !
> rtpopuspay ^
>     ! udpsink host=192.168.1.108 port=7480 async=FALSE ^
>   udpsrc port=7480 caps="application/x-rtp, ssrc=(uint)1537893241,
> payload=(int)96, channels=1, clock-rate=48000" ^
>     ! rtpjitterbuffer latency=10 ! rtpopusdepay ! opusdec plc=true
> use-inband-fec=true  ! audioconvert ! audio/x-raw, format=F32LE,
> layout=non-interleaved, rate=48000 ! webrtcechoprobe ^
>     ! audioconvert ! wasapisink low-latency=true
> 
> Also, while it does not seem to affect actual operation, the above pipeline
> generates a lot of the following errors. Any idea what this is?
> 
> ** (gst-launch-1.0:10236): CRITICAL **: 16:51:58.551: the GstAudioInfo
> argument is not equal to the GstAudioMeta's attached info
> 
> Thanks,
> Attila
> 
> 
> 
> 
> 
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