About Audio Echo Cancellation Quesion

[hooooooouzx]

Description

Hello sir,I'm using flutter_rtmp_broadcaster to make a living app.Anchor1 and Anchor2 can connect and talk to each other,but there will be a serious echo issue,anchors will hear their own voice from a few seconds ago.

I've looked through many information,they told me maybe use some AEC algorithm to solve this,sir,do you have any suggestion about this issue which I met?I won't use webRTC beacuse it's a living streaming app.

Thanks.