To migrate a virtual machine, you must shut it down and export it using the Hyper-V Manager:
After completing the export procedure, a folder with a virtual hard drive will be created in the destination folder:
This drive must be converted to VMDK format, for example with StarWind V2V Converter. Next, you can use VMware Workstation Pro to create a machine from the resulting disc and export it to OVF (see article).