Importar VM de formato OVA a formato para qemu/kvm

# List the available formats
$ qemu-img -h | tail -n1
Supported formats: vvfat vpc vmdk vdi sheepdog raw host_cdrom host_floppy
host_device file qed qcow2 qcow parallels nbd dmg tftp ftps ftp https http
cow cloop bochs blkverify blkdebug

# Do the actual conversion (I chose qcow2 here)
$ qemu-img convert -O qcow2 MyAppliance-disk1.vmdk MyAppliance.qcow2

Enlace: https://wiki.hackzine.org/sysadmin/kvm-import-ova.html