preprocessing #face is invalid: 0

During the preprocessing of the HDTF video dataset, the message "#face is invalid: 0" was displayed. This issue occurred in many videos. Could you please advise on how to resolve it?[](url)

<img width="892" height="330" alt="Image" src="https://github.com/user-attachments/assets/c3cb2522-a908-497b-a1ad-a4a8a1909989" />