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fal.ai
fal.ai (/media/fal) is the canonical studio for Postmill's fal.ai integration. It exposes every fal-hosted model currently implemented by the adapter: FLUX images, Stable Audio, Kling video, and Pika video.
The legacy /media/kling URL redirects here. That URL previously showed only fal-hosted Kling models; direct Kling API access remains separate at Kling AI (/media/kling-ai).
Where to configure
Configure one fal.ai API key at Settings → Content → AI Media → fal.ai. The fal.ai provider card opens /media/fal. The same configured connection also powers the branded Pika studio; there is no separate Pika provider card or credential. Postmill encrypts the key at rest and has no environment-variable fallback. Test connection is free — it reads fal's model catalog (GET https://api.fal.ai/v1/models) and never triggers a billed render.
Tabs / operations
| Tab | Operation | Model(s) | Produces |
|---|---|---|---|
| Text → Image | image | fal-ai/flux/schnell | FLUX.1 Schnell images (image size, 1–12 inference steps, JPEG/PNG, seed, safety checker) |
| Kling Text → Video | video | Kling 2.5 Turbo Pro (default) and 2.6 Pro | Text-conditioned Kling clips — prompt, negative prompt, 5/10 s, 16:9 / 9:16 / 1:1 |
| Kling Image → Video | video | Kling 2.5 Turbo Pro (default) and 2.6 Pro | Kling clips animated from a source image — prompt, negative prompt, 5/10 s |
| Pika Text → Video | video | fal-ai/pika/v2.2/text-to-video | Pika 2.2 clips |
| Pika Image → Video | video | fal-ai/pika/v2.2/image-to-video | Pika 2.2 clips from a source image |
| Text → Music | audio | fal-ai/stable-audio | Stable Audio music and audio (1–47 s, CFG scale, seed) |
The two Kling models expose different extras: CFG scale (0–1, default 0.5) appears only for Kling 2.5 Turbo Pro, and the Generate audio toggle appears only for Kling 2.6 Pro. The adapter strips whichever field the chosen model does not accept, and maps the 2.6 image-to-video source image onto fal's start_image_url.
Generation flow
Flux images use fal.ai's synchronous generation endpoint. Kling, Pika, and Stable Audio jobs use the fal.ai queue and appear in the Render Queue. Kling 2.6 can optionally generate native audio; it is off by default to avoid unexpected audio charges. Completed artifacts are saved to /files and can be opened in the Designer or posted directly. When the backend has a public HTTPS URL the submit request carries a fal_webhook callback; otherwise (and as a fallback) the shared media-jobs poll cron completes the job.
Related docs
- Pika — the branded Pika studio using the same fal.ai connection.
- Kling AI — the independent official Kling API integration.
- Media Studios — the shared render-queue and handoff flow.
- Settings — provider credential setup.
Verified against v1.5.0