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?

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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.

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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.