Dear Linux people,

I want to develop an application (bundle) which acts like a daemon and
converts a video stream (received via tcp/ip) to a sdi card such as
blowfish444...
What I also need is to overlay text based content (like mplayer does
for example).
I'm familiar with c and c++ developing under linux, driver and realtime
development... But multimedia?

Now my question:
Can anyone tell me, what libraries you would use? Where can I get
additional information?

Thank you
Johann