ComfyUI Node
arkennemasis fal · Flux 3 Edit Video · $0.03/s
FLUX.3 Edit Video [FAST] is Black Forest Labs' frontier video model. This endpoint edits an existing video from natural-language instructions, applying targeted changes while preserving the rest of the scene. Pricing (from fal, 2026-09-29): Your request will be charged at $0.03 per second of generated video (720p). Model page: https://fal.ai/models/blackforestlabs/flux-3/edit-video Key: FAL_KEY in the .env next to run_nvidia_gpu.bat. Results are saved in output/fal/blackforestlabs_flux-3_edit-video/.
arkennemasis fal · Flux 3 Edit Video · $0.03/s
- video
- video
- video_path
- seed
- info
◄prompt►
◄safety_tolerance2►
◄max_cost_usd20.0►
◄reuse_identical_runtrue►
◄extra_json►
◄max_concurrent1►
Categoryarkennemasis/fal/Video/Flux
Inputs (7)
| Name | Type | Default | Description |
|---|---|---|---|
| prompt | STRING | The text prompt describing how to change the input video. The clip is re-rendered preserving motion, timing, and framing. | |
| safety_tolerance | INT | 20–4 | The safety tolerance level for the generated video. 0 is the strictest and 4 is the most permissive. |
| video | VIDEO | URL of the input video. MP4, under 50 MB and under 15 seconds. | |
| max_cost_usdopt | FLOAT | 20.00–100000 | Safety cap. If the estimated cost of this run is above this many US dollars the node stops BEFORE sending anything to fal. 0 = no cap. |
| reuse_identical_runopt | BOOLEAN | true | If these exact inputs (the settings AND the same pictures/clips/audio) were already paid for and the files are still in output/fal, return them instead of paying again - also after a ComfyUI restart. Turn off for a fresh take with the same settings. |
| extra_jsonopt | STRING | Advanced: a JSON object merged into the request last, for any fal field this node has no box for. Example: {"seed": 7}. Leave empty normally. | |
| max_concurrentopt | INT | 11–32 | How many paid fal calls may run at the same time in one run, across every fal node. 1 (default) = one after another. This node starts its paid part only while fewer than this many fal calls are running. Once any fal node fails, the ones still waiting are not started, so nothing more is billed. |
Outputs (4)
| Name | Type | Description |
|---|---|---|
| video | VIDEO | — |
| video_path | STRING | — |
| seed | INT | — |
| info | STRING | JSON: request id, cost estimate, saved files and fal's full answer. |