mediamtx/docs/2-usage/23-rtmp-specific-features.md

RTMP-specific features

Encryption

RTMP connections can be encrypted with TLS, obtaining the RTMPS protocol. A TLS certificate is needed and can be generated with OpenSSL:

openssl genrsa -out server.key 2048
openssl req -new -x509 -sha256 -key server.key -out server.crt -days 3650

Edit mediamtx.yml and set the rtmpEncryption, rtmpServerKey and rtmpServerCert parameters:

rtmpEncryption: optional
rtmpServerKey: server.key
rtmpServerCert: server.crt

Streams can be published and read with the rtmps scheme and the 1937 port:

rtmps://localhost:1937/...

Be aware that RTMPS is currently unsupported by all major players. However, you can use a proxy like stunnel or nginx or a dedicated MediaMTX instance to decrypt streams before reading them.