Steps to reproduce:
1. Configure a custom_video_src
2. Do not include capture.device.<device>.src
3. The input will not be reported in the capabilities
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.