Vidu

Add the character to the subject library first, then generate new scenes, and the face drifts less. The catch: you must build those assets first; it's not plug-and-play from a prompt.

I ran the exact same prompts for comic drama, short drama and film. Against other tools it wins some, loses some; prices and per-scenario results vary a lot. One tool doing it all isn't realistic.

I chose it mainly because you can set multiple keyframes and each segment's length separately. Far more control than just first and last frames.

The worst part of image-to-video: I clearly wrote the action, but the person just smiles and moves a bit. I reckon forty percent of the credits I bought went down the drain.