Reactor Runtime
A Python framework for building real-time, interactive video models. Write your ML code — Reactor handles networking, media transport, and client connections.
Installation
pip install reactor-runtime
Quick Example
from dataclasses import dataclass
from reactor_runtime.interface import Output, Video, ReactorPipeline, InputState, InputField
@dataclass
class MyOutput(Output):
video: Video
@dataclass
class MyState(InputState):
prompt: str = InputField(default="a sunny meadow")
class MyModel(ReactorPipeline):
state: MyState
def load(self, config):
self.pipe = load_my_model(config["checkpoint"])
def inference(self):
while True:
frame = self.pipe.forward(prompt=self.state.prompt)
yield MyOutput(video=frame)
Implement inference() as a generator that yields frames. Clients can update self.state mid-generation — no restart, no re-queue.
Key Features
- Real-time streaming — frames delivered over WebRTC as they're generated
- Live interaction — clients change inputs mid-generation via typed, validated state
- No transport code — no WebRTC, WebSocket, or video encoding to manage
- Scaffold & run — the Go
reactorCLI gives youreactor init/reactor run; the Python runtime ships its ownreactor-runtimescript for standalone use
Standalone usage (no Go CLI)
The runtime CLI is installed as reactor-runtime so it never shadows the Go
reactor binary. If you only use the Python runtime:
pip install reactor-runtime
reactor-runtime init my-model
cd my-model
python -m venv .venv && . .venv/bin/activate
pip install -r requirements.txt
reactor-runtime run
The Go reactor CLI delegates to this same reactor-runtime script under the
hood; both reactor run (Go) and reactor-runtime run (standalone) execute the
same Python entry point.
1 maintainer
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