VLSub is not working with Vlc 2.1.x on any platform because the lua “net” module needed to interact with opensubtitles has been removed in this release for the extensions.
We will install a daily build from Videolan, but we will need some custom PPA’s for that. Use at your own risk.
PPA Videolan for vlc and vlc-nox: sudo add-apt-repository ppa:videolan/master-daily
sudo apt-get update sudo apt install vlc
If VLC crashes when playing MP4, have a look at:
Video output module: Tools->Preferences->Video->Output Hardware acceleration: Tools->Preferences->Input/Codec->Hardware accelerated decoding
and play with the options.
I think aptitude is more friendly then apt-get, whatever…
sudo aptitude install vlc
VLSub will be auto installed and functional withing VLC. Also all codecs should be available