"""Thin wrappers around 3rd-party video generation models.

Each submodule isolates one external dependency so the real API surface
can be updated in a single file without touching the pipeline.

Submodules:
- ``wan22``: Wan2.2-Lightning image-to-video via LightX2V
- ``musetalk``: MuseTalk audio-driven lip-sync
- ``muxer``: ffmpeg-based frame/audio → MP4 encoding
"""