G.711 decrease to 8kHz

[Footniko]

Hello!
How can I decrease g.711 (PCMA) sound rate from 16000 to 8000? I use this
pipeline:
*gst-launch alsasrc ! queue ! alawenc ! rtppcmapay ! udpsink
host=192.168.1.16 port=3001*

And, as default, it streams 16kHz audio. I also have been tryied:
*gst-launch alsasrc ! audioconvert !
audio/x-raw-int,channels=1,depth=16,width=16,rate=8000 ! alawenc !
rtppcmapay ! udpsink host=192.168.1.16 port=3001*

At this way it still 16kHz. Then i've been tryied:
*gst-launch alsasrc ! audioconvert !
audio/x-raw-int,channels=1,depth=8,width=8,rate=8000 ! alawenc ! rtppcmapay
! udpsink host=192.168.1.16 port=3001*

But got an error:
*WARNING: erroneous pipeline: could not link audioconvert0 to alawenc0*

Thanks, regards.




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