Overview
https://hometheatrelife.com/best-dlna-media-server-software-streaming-media/

• Jellyfin + FOSS,
• GeeXboX uShare UPnP Media Server
• MediaTomb >>Gerbera
• Emby + FOSS, + cloud sync
• minidlnad -dSv # debug, stay foreground, verbose

Feature comparison
https://www.universalmediaserver.com/comparison/
https://en.wikipedia.org/wiki/Comparison_of_UPnP_AV_media_servers

• Universal Media Server
• PS3 Media Server (JAVA!)
• BubbleUPnP Server (JAVA!)
• KooRaRoo
• Serviio (JAVA!)
• Plex

DLNA Server: miniDLNA
http://sourceforge.net/projects/minidlna/

• apt install minidlna # 416 kB
• Setting, troubelshooting:https://askubuntu.com/a/313449
• Trouble w/ /var/log:https://askubuntu.com/a/329360

DLNA Server: Rygel
https://wiki.gnome.org/Rygel

• -- 8 MB packet
• ++ It is easy to use and does transcoding on the fly.

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DLNA Client: djMount
https://askubuntu.com/a/88799

• ++ no need to sudo
• ++ no need for -o allow_other
• ++ Script:https://askubuntu.com/a/411527

DLNA Client: simple-dlna-browser
http://javier.io/blog/en/2016/01/22/simple-upnp-dlna-browser.html