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Are There Any Requirements for the Key and Timeout Interval in URL Validation?

A key must be 16 bytes long. It consists of letters and digits, for example, C94D54F0B61EDC6E.

The timeout interval ranges from 1 minute to 30 days. You are advised to set this to the length of a live stream. If the timeout interval expires, you need to re-configure the key and create new ingest and streaming URLs. For details, see Stream Authentication and Playback Authentication.