Playing AVI, WMV, SWF on a website, with single player

I've been looking for a player to support multiple formats, the ones in the title for example, or several that 开发者_StackOverflow中文版I could use to play them, but I've had no luck, has anyone actually developed one for all formats? Or does anyone have a solution?

You don't give a use case, so I'm not sure if you really need AVI playback, but in general, the way going forward for video on the web is HTML5 video. Mark Pilgrim's Dive into HTML5 has a great rundown of the topic and I'd recommend Video for Everyone as a specific implementation.