device: 0.801
performance: 0.694
graphic: 0.552
network: 0.514
permissions: 0.496
semantic: 0.450
other: 0.279
PID: 0.212
boot: 0.204
debug: 0.201
socket: 0.135
files: 0.092
vnc: 0.049
KVM: 0.004

please make qemu-img capable of using with pipes