Can you share an example of this happening? I am curious. We can get static videos if our model doesn't recognize it as a face (e.g. an Apple with a face, or sketches). Here is an example: https://toinfinityai.github.io/v2-launch-page/static/videos/...
I would be curious if you are getting this with more normal images.
I got it with a more normal image which was two frames from a TV show[1]; with "crop face" on, your model finds the face and animates it[2] and with crop face off the picture was static... just tried to reproduce to show you and now instead it's animated both faces.
[1] https://i.pinimg.com/236x/ae/65/d5/ae65d51130d5196187624d52d...
[2] https://6ammc3n5zzf5ljnz.public.blob.vercel-storage.com/inf2...
[3] https://6ammc3n5zzf5ljnz.public.blob.vercel-storage.com/inf2...
But that image was one which both could find a face and gave a static image once.