A Simple How to use MiniDLNA on OpenWRT

SSH/Telnet into the Router
The configuration file is located at /etc/config/minidlna
The database file is located at /var/run/minidlna/files.db
An example config file as shown below:

config minidlna 'config'
    option port '8200'
    option interface 'br-lan'
    option db_dir '/var/run/minidlna'
    option log_dir '/var/log'
    option inotify '1'
    option model_number '1'
    option root_container '.'
    option album_art_names 'Cover.jpg/cover.jpg/AlbumArtSmall.jpg/albumartsmall.jpg/AlbumArt.jpg/albumart.jpg/Album.jpg/album.jpg/Folder.jpg/folder.jpg/Thumb.jpg/thumb.jpg'
    option enabled '1'
    list media_dir '/home/Share/Movies/'
    option notify_interval '3600'
    option friendly_name 'MiniDLNA Server'
    option serial '13847284'

You can change the friendly_name which will be displayed in your network on Windows 7.
Also you can change the media directory.
It should be located on your external harddisk.
The example above shows it is at /home/Share/Movies/
What happens when your files does not show?

First check if the service is started or do the following

/etc/init.d/minidlna enable && /etc/init.d/minidlna start
/etc/init.d/miniupnpd enable && /etc/init.d/miniupnpd start

If it still does not show the files but you can access the collection it means the database has been populated with an empty file.
To rectify the issue delete the database file do:

rm /var/run/minidlna/files.db

Then restart MiniDLNA and it will rescan your Harddisk Drive for Media

/etc/init.d/mindlna restart