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* OpenSSL 3.0.0-beta1 (https://www.openssl.org/source/apache-license-2.0.txt)
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* WebRTC native code (https://webrtc.org/native-code/development/)
We do not use "WebRTC Native Code" as a library. But we got a lot of ideas from "WebRTC Native Code" and reference a lot of code (especially RTP Packetizing). Special thanks.
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