DM6467 4-channel encode+pattern recognition

HI

I'm using dvsdk 2.0 on DM6467.

DM6467 supports 4-channel D1 real-time 264 encoding. I wanna add my algorithm of pattern recognition before encoder.

my question is about the software framework.

In the sample code, 3 threads are used for single channel: capture, video and write.

For 4-channel, what's the best solution?

still 3 threads? handle each channel in the thread?

or use 3*4 threads? is this too complicated?

any other suggestion or idea?

Thanks.