kristian@sunrider:filmer$ time dd if=aaaa.avi of=/dev/null 
1434876+0 records in
1434876+0 records out
734656512 bytes (735 MB) copied, 208.518 seconds, 3.5 MB/s

real	3m28.533s
user	0m0.504s
sys	0m2.472s
kristian@sunrider:filmer$ time dd if=aaaa.avi of=/dev/null 
1434876+0 records in
1434876+0 records out
734656512 bytes (735 MB) copied, 2.21156 seconds, 332 MB/s

real	0m2.246s
user	0m0.412s
sys	0m1.800s