II created this document for the company where I work. Maybe it is userfull for you too:

Migrate from VMWare to oVirt

1.    On VmWare:

a.    Export the VM to ovf format. There is a smb/nfs share on virt-v2v you can use as storage. 
i.    NFS: Virtv2v.:/media/Storage
ii.    SMB: virtv2v.  share: virtv2v

2.    with virtv2v

a.    Log in on the virt-v2v vm.
b.    Locate and Extract the ovf file with tar –xvf
c.    Convert the extracted vmdk file to raw disk format with the following command:
vboxmanage clonehd --format RAW <VMNAME>.vmdk <NewVMName>.raw
d.    Convert the created RAW file to a qemu2 img:
qemu-img convert -f raw <VM-Name>.raw -O qcow2 <VMName>.qcow2
e.    Run the vm in virsh:
virt-install --connect qemu:///system --ram 1024 -n griffu -r 2048 --os-type=linux --os-variant=rhel6 --disk path=/media/Storage/<VMName>.qcow2,device=disk,format=qcow2 --vcpus=2 --vnc --noautoconsole –import
f.    Take a xml dump of the VM and copy the result in a new file <VMName>.xml
virsh dumpxml <VMName>
g.    Now let’s move the vm to ovirt. Make sure the nfs is attached to the TestDev Datacenter.
virt-v2v -i libvirtxml -ic qemu+ssh://<FQDN-Hypervisor> /system -o rhev -os <FQDN-NFS-exportdomainserver>:/media/NfsProgress -n ovirtmgmt <VMName>.xml