Please find attached a patch adding support for wolfSSL as a TLS backend.
This is against release ffmpeg-5.0.1, and is working well with wolfSSL
5.1.1 (January 2022 release).

This is based on a patch previously submitted in 2018 which never made it
into the mail codebase, but now updated for ffmpeg-5.0.1. The previous
version by samsamsam is at
https://lists.ffmpeg.org/pipermail/ffmpeg-devel/2018-August/233802.html.

Does this look useful? I developed this after identifying wolfSSL as most
suitable for adding TLS capability to very resource limited hardware
(Reciva internet radios, based around an ARMv4 CPU and just 32MB RAM,
for context more info about this application here:
http://www.megapico.co.uk/sharpfin/mediaserver.html).

Best regards, David.