Athlon64 X2 @ 2,6 Ghz 2 GB of RAM 460 GTX 768 MB Windows Seven x64 doing nothing but testing. Tested with two files on the first partition of an auxiliary 1 TB HDD, neglectable fragmentation, no throughput issue. 6 runs in a row, program restarted after each set of runs, times in seconds. - File #1 ...

+1 for a directshow filter! Having the possibility to repatriate the decoded stream from the gpu to the cpu à la CoreAVC 'cuda' would allow the ffdshow raw filter to jump in. This is currently impossible for 1080p24 VC1 on my 5-year-old Athlon X2. The fastest software decoder is still too slow on th...

Tried on an HD source and reproduced in the attached example. Cropping 6 6 6 6 results in 4 lines cropped top and left, and 8 bottom and right. Windows 7 x64.
Cheers