> Software reduction means you grab the whole 704 by 576 (when PAL) pixels > for every frame, copying from the mmap-ed buffers to your own buffer. > Then you skip say 3 out of every 4 lines, and in the lines you keep, > skip 3 out of every 4 pixels. There are subtler methods but this one is > simple. I'd suggest capturing 720x576 - else the card already starts downscaling in hardware.
