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Yes, it is possible...most likely you will want to parameterize the stream counts (rather than hard-coding '12') to make efficient use of block transfers based on GPU-specs including avail. memory, video format and frame specs, frame speed, and GPU algorithm-execution performance.
Here is nVidia's somewhat dated whitepaper link from their video decode/encode kit, which may outperform the VideoCapture/VideoWriter: http://www.nvidia.com/docs/IO/40049/TB-Quadro_VideoCaptureStreaming_v01.pdf
More importantly is their Codec SDK: https://developer.nvidia.com/nvidia-video-codec-sdk
My assumption is that CV/Cuda will be used within the frame-based algorithm, so I'll leave that to you....but the nVidia codec SDK will get you in and out again from the GPU without CPU-based video writes.
Also, here is a link to IntuVision's publication and commercial products that scale to make use of GPU resources for video analytics: www.intuvisiontech.com/tech/publications_13.php www.intuvisiontech.com/products/gpu.php
--Gotta give credit where credit is due, and IntuVision does it well!
Hope this helps, JasonInVegas
