Live subtitling
With the kaldi ASR it is possible to provide an open source based speech-to-text service.
https://www.inf.uni-hamburg.de/en/inst/ab/lt/publications/2021-geislingeretal-interspeech-bbb.pdf
https://github.com/uhh-lt/bbb-live-subtitles was developed for BBB 2.2, for 2.4 some tweaks are necessary.