Creeping line in Linux

I have computer with Linux (Gentoo), which play movies (via mplayer) and display HTML pages (via Firefox) in the hall of our building ( some kind of information and advertisement display ) . Now I need to add such feature as creeping lines. They should be displayed on top of mplayer and Firefox开发者_Go百科 and I need to have possibility to change text, background, size and font of text. Before I will start to develop such application from the beginning, may be somebody know such already existing tool?

You could search for OSD (on screen displays) for linux and try to abuse these. ) A quick search returns osd-lyrics and xosd. The latter looks much like what you look for.

I think you mean the crawling text we see at the bottom of some TV news broadcasts.

This was asked about in a previous SO question in relation to the iphone. I found it by Googling "crawling text display" but I've lost the link now.

Maybe you can find it and adapt it.