Avisynth, filtre subtitle()
Subtitle
Subtitle(clip, string text, int "x", int "y", int "first_frame", int "last_frame", string "font", int "size", int "text_color", int "halo_color" )
Subtitle(clip, string "text" )
The Subtitle filter adds a single line of anti-aliased text to a range of frames. If you want more than one subtitle, or a subtitle that takes more than one line, you have to chain several Subtitle filters together. This filter is obviously unsuitable for anything more than occasional use. I use it occasionally.
The text color and halo color should be given as hexadecimal RGB values, as in HTML--except that they start with $ instead of #. (I was already using # to introduce a comment.)
The alternate, short form is useful when you don't really care what the subtitle looks like as long as you can see it--for example, when you're using StackVertical and its ilk to display several versions of a frame at once, and you want to label them to remember which is which.
This filter is used internally by Avisynth for the Version command and for reporting error messages, and the subtitling apparatus is also used by ShowFrameNumber.