Because I have quite a lot of files, I put the maintenance window very long (the whole day) but the server isn’t generating voice data. I used WebTools to verify that all other data is generated and done. The server simply seems to idle.
The setting is put to “during maintenance” and the relevant libraries have it checked too.
Yes, not running the analysis as a scheduled task here either. Only newly added movies are being analyzed. A manual full library analysis also skips over voice activity detection. You can manually run them in small batches, but I gave up.