semantic: 0.169
other: 0.167
files: 0.097
device: 0.090
vnc: 0.070
graphic: 0.066
performance: 0.063
socket: 0.053
network: 0.052
permissions: 0.046
debug: 0.044
PID: 0.042
boot: 0.024
KVM: 0.017
debug: 0.762
files: 0.046
KVM: 0.043
other: 0.040
device: 0.017
semantic: 0.016
performance: 0.016
PID: 0.012
socket: 0.012
network: 0.009
vnc: 0.008
boot: 0.008
graphic: 0.006
permissions: 0.005

qemu-img convert file.vmdk: Invalid footer

Steps to reproduce
- Open ESXi 6.5 Web UI
- Export OVF
- qemu-img convert disk.vmdk disk.qcow2

Error:

    qemu-img: Could not open './disk-1.vmdk': Invalid footer

I found another person having this problem here:
https://forum.proxmox.com/threads/error-converting-vmdk-file-to-qcow2-file.38264/
As I guess from the answer, the guy went over to manually copy the flat file from the datastore instead of using the ovf-exported file.

Nevertheless, I think this bug should be investigated further and closed. Probably it is just some metadata issue and should not be too hard to fix once the root of the problem is found.

I just compiled the version in the master branch and the same error occurred.

Probably my image was corrupt since it works with another image. So this bug can be closed.