I want to configure DRM using Google Transcoder API, but I can't find related samples or guides. Has the DRM setting function deprecated? Although it is a beta version, there was also a release note that the DRM function was added. Or has this function been transferred to another API?
There was a note in the August 2021 release around DRM:
Encryption support (and its associated documentation) is temporarily unavailable.
(https://cloud.google.com/transcoder/docs/release-notes#August_31_2021)
There is no note following that suggesting that it has been added back in - you are correct that there was previously online documentation for DRM but those links are no longer live from what I have seen.