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Flutter WebRTC calls that never connected: three bugs, three fixes

by Frank Milvus dev.to

10 min read

Read on dev.to

For two weeks, every 1:1 audio and video call in our Flutter app failed the same boring way: the caller saw "Calling…", the screen flipped to "Ended" about a second later, and the callee's phone never rang. The client logs looked fine. The peer connection reached have-local-offer and then closed. The temptation is to pick one suspect and start there. We spent the first evening on the relay server…

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