It's fairly easy to grab an avi from the video card and convert it to mpg, see ztk-v4l-video-bloger/recorder for realtime video displayed in a Tk window using Mplayer. And you can convert it to flash, through swftools. But doing it in a "streaming" manner is quite new and isn't easy to do. First I don't think that flash has a "realtime stream capability", and if it does, Macromedia probably is keeping it well wrapped up in "pay-for" software.

You probably want to look at google for 'video streaming', if you are interested; and look for GStreamer, Ogg-theora, and mp3 streaming.

Think about this for a minute. What you are essentially asking is to set yourself up as an "internet live tv broadcast". Currently it is being done with audio, with RealPlayer streams, etc, but video is alot higher bandwidth. It will come eventually, as everyone gets wideband, but you can be sure your ISP will make you pay extra for the high-bandwidth usage that video requires. The TV companies do it through direct satellite links for their remote cameras, but they pay a hefty fee for doing it.

So right now, you can record say 1 minute segments from your video card, convert to flash files, and make a Perl script to make automatic links to them. But they will be delayed by a minute or two, and you will might quickly use up the monthly bandwidth your ISP allocates to you.

My DSL provider( and cable providers)will claim that you have unlimited bandwidth, but you can believe that if enough people started moving realtime video around, they will quickly slap surcharges onto the bills for excessive use.