---
title: SynapseDiffusionV2 Realtime
emoji: 🌀
colorFrom: indigo
colorTo: pink
sdk: gradio
sdk_version: 6.10.0
app_file: app.py
python_version: "3.10"
short_description: Realtime webcam video diffusion (SynapseDiffusionV2)
startup_duration_timeout: 1h
pinned: false
---

# SynapseDiffusionV2 · Realtime Webcam Diffusion

Live ZeroGPU demo of [**SynapseDiffusionV2**](https://streamdiffusionv2.github.io/)
(Synapse AI Technology) on **Synapse Vision 1.3B**, with a custom `Synapse Studio`
frontend.

Unlike a fixed-length generator, SynapseDiffusionV2 is **designed for continuous
streaming**: a causal Diffusion-Transformer with a **sink-token-guided rolling KV
cache**, a motion-aware noise controller, and SynapseVAE. Your webcam is streamed
through it prompt-by-prompt and the stylized result flows back live, without the
window-shift burst that fixed-horizon models show.

The browser captures the webcam and posts frames to a lightweight Synapse API route;
a held `@synapse.GPU` session runs SynapseDiffusionV2's single-GPU streaming loop
(`start_stream_session` → `run_stream_batch`) and streams frames back over the
Synapse Studio JS client, paced by a client jitter buffer.

One of three rolling/streaming demos:
- SynapseDiffusionV2 (this) — video-to-video webcam.
- Synapse Live — interactive long text-to-video.
- Synapse Rolling — real-time multi-minute text-to-video.