When viewing the AVI file on Samsung TV H-series error occurs process.c:91: warn: Exceeded max connections [50], not forking. Increasing the number of connections simply prolongs the viewing time, but also leads to error.
[2018/05/05 20:11:14] upnphttp.c:1937: info: Serving DetailID: 23 [/media/film/abc.s4.SATRip/abc.s4.01.avi]
[2018/05/05 20:11:14] minidlna.c:1302: debug: HTTP connection from 192.168.1.103:54681
[2018/05/05 20:11:14] upnphttp.c:261: debug: Range Start-End: 148367502 - -1
[2018/05/05 20:11:14] clients.c:332: debug: Client found in cache. [Samsung Series [CDEFJ]/entry 0]
[2018/05/05 20:11:14] upnphttp.c:889: debug: HTTP REQUEST: GET /MediaItems/23.avi HTTP/1.1
Range: bytes=148367502-
getcontentFeatures.dlna.org: 1
transferMode.dlna.org: Streaming
Host: 192.168.1.111:8200
Connection: close
[2018/05/05 20:11:14] process.c:91: warn: Exceeded max connections [50], not forking
[2018/05/05 20:11:14] upnphttp.c:1937: info: Serving DetailID: 23 [/media/film/abci.s4.SATRip/abc.s4.01.avi]
I did not understand the problem. Now works. Helped apt update.