Nariman Sayed enhanced the security and reliability of FFmpeg’s TLS and DTLS implementations by upgrading certificate signing to SHA-256 and addressing memory management issues in the FFmpeg/FFmpeg repository. Using C and OpenSSL, Nariman fixed memory leaks in certificate parsing and connection teardown, improving resource management and maintainability. In the ossrs/ffmpeg-webrtc repository, Nariman improved DTLS handshake reliability by introducing non-blocking mode and timeout handling for retransmissions. Additionally, Nariman corrected RTCP Receiver Report logic to ensure RFC 3550 compliance by clamping cumulative packet loss to the signed 24-bit range, demonstrating depth in protocol implementation and software debugging.