device: 0.801
peripherals: 0.698
performance: 0.694
graphic: 0.552
mistranslation: 0.545
network: 0.514
permissions: 0.496
semantic: 0.450
architecture: 0.271
virtual: 0.250
register: 0.238
assembly: 0.218
PID: 0.212
boot: 0.204
debug: 0.201
arm: 0.175
socket: 0.135
hypervisor: 0.129
user-level: 0.127
VMM: 0.116
ppc: 0.102
files: 0.092
i386: 0.056
x86: 0.050
vnc: 0.049
TCG: 0.042
risc-v: 0.020
kernel: 0.020
KVM: 0.004

please make qemu-img capable of using with pipes