Windflow vs Decart: evaluating a live video editing API
Evaluate Decart Lucy and Windflow SANA or JoyAI for live camera editing. Compare reference inputs, media paths, token limits and measurement boundaries.
Decart's Lucy and Windflow's SANA-Streaming or JoyAI-Video-Edit are options for transforming a live video source. Start with the edit you need, the reference inputs it requires, and the quality and visible delay you can accept. Windflow does not serve Lucy in its current public catalog; choosing Windflow means evaluating a different model, not changing the host of the same checkpoint.
This page is maintained by Windflow and checks primary sources as of November 9, 2026. It compares documented integration choices. It contains no measured quality or speed ranking between the services.
Choose by the edit and inputs
Decart's current Lucy 2.6 documentation describes live edits driven by text, a reference image or both. Examples include object changes, backgrounds and character replacement. Pin a model ID when comparing results; a latest alias can change the model being evaluated.
| Requirement | Decart route to evaluate | Windflow route to evaluate |
|---|---|---|
| Prompt-driven live style or background edit | Lucy realtime | SANA-Streaming or JoyAI-Video-Edit |
| A visual reference for the edit | Lucy's reference-image input | JoyAI's published reference-image control; SANA's current Windflow profile has no reference-image input |
| Specialist garment workflow | Decart's dedicated virtual try-on model | Evaluate whether a general editor is adequate; Windflow does not claim an equivalent specialist model |
| Several model families in one application | Check Decart's exact current model and task | Windflow's common session lifecycle also covers continuous generation and interactive worlds |
Windflow's SANA guide and JoyAI guide describe their supported sources and controls. An instruction expresses the intended edit; neither an attractive sample nor a high frame rate proves that identity, hands, clothing or background details stay unchanged on your inputs.
Separate the control plane from the video path
Decart's integration-path reference uses WebRTC for media and offers direct SDK, WebSocket-signaling proxy and HTTP-signaling approaches. Proxying signaling does not, by itself, proxy the camera media. That distinction matters when planning connectivity, deployment and where user video travels.
Windflow negotiates a supported media offer for each session. Its SANA and JoyAI profiles currently publish WebSocket and WebRTC support. Treat the returned transport offer as the integration contract, and measure the path your application actually uses. Protocol support alone does not rank latency.
For a Lucy workflow obtained through fal instead of Decart directly, inspect the specific partner endpoint and account terms. The fal realtime comparison explains why endpoint and signaling details matter.
Bound access and paid session lifetime separately
Decart's client-token documentation recommends short-lived credentials minted by the backend. It distinguishes the window for starting a connection from the maximum duration of an already-connected session: token expiry does not automatically terminate that live session.
Windflow also keeps the account key on the server and issues scoped browser credentials. Use model scope, a creation limit and a session-duration limit where appropriate. Handle denied camera permission, a canceled start and a late creation response, then confirm cleanup. The browser examples illustrate those paths without exposing an account key.
For billing, Decart's pricing reference distinguishes realtime active-generation seconds from generated-video seconds and per-image charges. It also lists separate standard and fast realtime tiers. Check the exact model, mode and current rate before estimating usage.
Windflow bills as follows: Billing starts at the session's first generation_started event and stops when the session is released or ends. Queueing, worker startup, time before generation starts and the documented reconnect grace are not billed. After generation starts, paused or unwatched time remains billable; release the owner session to stop the meter. Its rates are indicative private-beta rates on pricing. Comparing the two services requires a representative session timeline and the intended model. Different model quality, timing boundaries and modes prevent a defensible blanket cost multiplier.
A practical evaluation sequence
- Use the same consented source clip or repeatable camera movement and the same intended edit. Keep unedited input alongside output.
- Include an ordinary edit, a difficult pose, a partially occluded subject and a source change. Inspect full sequences rather than selected stills.
- Record capture-to-visible response and instruction-to-visible response separately. Note resolution, frame rate, enhancement settings, client and network.
- Interrupt the connection and finish the session deliberately. Verify actual termination and usage, not only that the output element stopped.
- Choose the model that meets your edit-quality and responsiveness requirements, then evaluate concurrency and access before a launch.
Windflow's SANA camera report and JoyAI latency report provide examples of precise measurement boundaries. The latter's 443 ms figure is from a worker-loopback stage, so it cannot be compared directly with another service's browser latency claim.
FAQ
Can I run Decart Lucy on Windflow?
Lucy is not in Windflow's current public catalog. For Lucy itself, inspect Decart's current API or the specific fal partner endpoint. Windflow offers SANA-Streaming and JoyAI-Video-Edit as different live-editing models to evaluate.
Which service is better for virtual try-on?
Decart publishes a dedicated virtual try-on model. Windflow does not claim a directly equivalent specialist endpoint. Evaluate a representative garment workflow and its reference requirements rather than assuming all live editors are interchangeable.
Can I try Windflow immediately without an account?
Live Windflow API use requires an approved private-beta account and credentials. A public guide or recording is not anonymous live access or a promise that GPU capacity is already running. Request access before scheduling a live evaluation.