services.minidlna.settings.notify_interval

The interval between announces (in seconds). Instead of waiting for announces, you should set openFirewall option to use SSDP discovery. Lower values (e.g. 30 seconds) should be used if your network blocks the discovery unicast. Some relevant information can be found here: https://sourceforge.net/p/minidlna/discussion/879957/thread/1389d197/