Subtitles problem
For a long time I had troubles playing media files with external subtitles (srt, sub) on LG BD player over DLNA (i.e. it was not possible). Finally I sorted it out!
Step 1: Installing FFP (fonz fun plug) as a package to NAS
http://zyxel.nas-central.org/wiki/FFP_as_zypkg
Step 2: Installing MiniDLNA
Console
# log into NAS with your admin password
ssh root@nsa310
# add repositories "Uli" and "barmalej2" to FFP
wget http://wolf-u.li/u/441 -O /ffp/bin/uwsiteloader.sh
chmod a+x /ffp/bin/uwsiteloader.sh
uwsiteloader.sh
# install miniDLNA and libraries
slacker -i minidlna
slacker -i br2:ffmpeg2/ s:libjpeg uli:flac s:libexif uli:libid3tag uli:libogg uli:libvorbis mz:sqlite br2:gettext br2:libiconv
# start miniDLNA
/ffp/start/minidlna.sh start
# to see media scan progress visit: http://nsa310:8200/
Versions
ZyXEL NSA310 firmware: V4.70(AFK.1)
FFP 0.7 (zypkg 4)
MiniDLNA 1.1.4
Other useful links
zyxel utils (e.g. for making R/O directory writable)
telnet backdoor (login into ZyXEL NAS without FFP or any other tool)