`srtpenc`, `dtlsenc`: Log keys to `SSLKEYLOGFILE`
Adding NSS Key Log Format logging to
dtlsenc would allow easy diagnosis of network-related issues using Wireshark as it will be able to decrypt the packet captures.
Adding it to these plugins, rather than higher-level plugins like
webrtcbin would allow a large portion of GStreamer to use this feature.
NSS Key Log Format is followed by Chrome, Firefox, Curl and Wireshark.