Viewing subtitle files
Sometimes
Videos come with an accompanying subtitle file. This is particulary
useful in a copy and distribute culture as this can be used as a base
for a further translation into a different language.
These files come in many different formats. Some common
ones are *.smi, *.str, *.sub
Video Lan and Subtitles
If you are not using Windows then You can Use Video Lan
to view Subtitle files that come with Video files.
To do this you Select File > Open, and after you have
browsed for your Video file you can then tick the box maked Subtitle
Options [1] and then browse for the Subtitle file [2].

Using Direct VobSub
By far the best way I've found of displaying subtitle
files in Windows is using DirectVobSub. This can be downloaded here.
It is a little bit of software that starts working when
you start to play a video file which has a subtile file of the same
name [different extension].
When it is running connectly you should see the subtitles
appear on the screen. The settings can be configured. If you open up
DirectVobSub, then you have many options for changing the way the subtitles
look. You can override normal placement of subtitles to display them
at the top of the screen - which is very useful if showing films in
crowded locations.
