you wanna look at jit.qt.grab, jit.qt.movie and jit.qt.record. you can do this in parallel, as long as your CPU and HD can take the load. should be fine with any not to antique system. just don’t go for full HD res.
I have the jit.qt.grab going into jit.qt.record and separately I have the jit.qt.movie playing. The live stream will not record while the moving is playing, unless I use write with and change the file name. Is there a way to record the live feed and append a number (like tester_5_1.mov and tester_5_2.mov) every time it records and having the movie play _1 _2 and so on?