wget -q -O /etc/apk/keys/alpine@unified-streaming.com.rsa.pub https://stable.apk.unified-streaming.com/alpine@unified-streaming.com.rsa.pub echo https://stable.apk.unified-streaming.com/unsupported/alpine/v3.13 >> /etc/apk/repositories apt update apk add mp4splitFor more information, see: documentation for instructions on how to install.