qemu-img \
create \
-f qcow2 \
-o compat=0.10 /var/lib/libvirt/images/sparse-qcow2.img 1073741824K
qemu-img \
convert \
--image-opts \
-n \
--target-image-opts \
--object secret,id=OtherDemo.img_encrypt0,\
file=/path/to/inputSecretFile driver=luks,\
file.filename=/var/lib/libvirt/images/OtherDemo.img,\
key-secret=OtherDemo.img_encrypt0 driver=qcow2,\
file.filename=/var/lib/libvirt/images/sparse-qcow2.img