Amcrest integration - how to modify the RTSP URL to disable audio/backchannel?

My AD410 doorbell is no longer working reliably, and the issue seems to be that something is keeping the audio channel open. This completely disables the doorbell button and all of the functionality associated with the button.

I’m using the AMCREST integration with the built-in go2rtc integration. This https://amcrest.com/forum/amcrest-smart-home-f32/ad110-stpopped-ringing-mechanical-bell-or-internal-t16702.html#p44327 says to add #backchannel=0 to the RTSP URL, but I can’t figure out how to do this or if it’s possible using the AMCREST integration. I appreciate any help!

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I have the same issue.
I think it started around the time the system update of HA which start using WebRTC built in a few months ago