Kandinsky S2V 1.0 Lite — Diffusers format

Speech-to-video generation: an avatar video is produced from a reference frame and a speech track. The whole figure is animated, not only the head. The audio is a condition — the model does not generate sound, it animates the person in the reference frame to match the speech it is given.

This repository holds the lite checkpoint laid out for Diffusers. The same weights in the native layout live in kandinskylab/Kandinsky-S2V-1.0-Lite.

Contents

The bundle is self-contained: the Thinker is exported without the Talker of the full Omni checkpoint, and CLIP without its vision tower, since neither is used.

Usage

import librosa
import torch
from diffusers import ModularPipeline
from diffusers.utils import encode_video, load_image

pipe = ModularPipeline.from_pretrained("kandinskylab/Kandinsky-S2V-1.0-Lite-Diffusers")
pipe.load_components(dtype=torch.bfloat16)
pipe.to("cuda")

image = load_image("reference.png")
audio, _ = librosa.load("speech.wav", sr=16000)  # a mono waveform at 16 kHz, for the model
speech, sample_rate = librosa.load("speech.wav", sr=None)  # the original track, added to the output video

video = pipe(image=image, audio=audio, output="videos")[0]
encode_video(
    video,
    fps=25,
    output_path="avatar.mp4",
    audio=torch.from_numpy(speech)[None],
    audio_sample_rate=sample_rate,
)

The pipeline and its blocks come from modular_model_index.json. Classifier-free guidance is the guider component, not a call argument.

Kandinsky S2V 1.0 is not part of a released Diffusers version yet; it lands as a modular pipeline.

Notes

Euler flow matching, 50 steps, classifier-free guidance 3.0.

Output is 125 frames per chunk at 25 fps (5 s) in one of the 512 buckets, chosen from the reference frame's aspect ratio. Longer speech is generated chunk by chunk, each conditioned on the previous one through FramePack memory.

Responsible use

The model animates a real person from a single photograph, driven by a voice that need not be theirs. Use a reference frame you have the subject's consent to animate, and do not present the result as a genuine recording of anyone.