Steps to reproduce:
1. Schedule a recording for X minutes
2. At completion duration listed at (X-1):60 ie. a 5 minute recording shows at having a duration of 4:60
Workaround (if any):
Per http://opencast.3480289.n2.nabble.com/JIRA-Ticket-Cleanup-proposal-td7475080.html, this has been bulk resolved as won't fix. If this is still important to you please reopen and we can triage as appropriate.