Applies a given operator to a specific key in a dictionary. Args: key: The dictionary key containing the file path to route.

Convert loaded video frames to float tensor in (V, C, T, H, W), range [-1, 1]. This operator converts a list of PIL Images or list of lists (for

Encode the conditioning frame directly into latents for Wan2.2 TI2V.

Input frame embedder aligned to target history-conditioning behavior: - For short input (<=1 or < num_frames), skip VAE-conditioned noise inj