GET

/v1/schemas/fal/video/wan/v2.6/reference-to-video/flash

Accept:

kind inputactivity videohash e0d902ec…extracted Aug 10, 2026version currentsource upstream spec ↗

field	recorded source
schema	Source linked above. Source trace `cb27aabde40d79f518169656577f751be8c664ae4e4488abb2505d6d3ef6ec54` { "fetchedAt": 1786338105, "extractorVersion": "1", "verifiedAt": null }

Request body

12 properties · 1 required · 0 $defs

property	type	description	constraints
prompt*	string	Use Character1, Character2, etc. to reference subjects from your reference files. Works for people, animals, or objects. For multi-shot prompts: '[0-3s] Shot 1. [3-6s] Shot 2.' Max 1500 characters. Reference order: video_urls first, then image_urls.	length ≥ 1
negative_prompt	string	Negative prompt to describe content to avoid. Max 500 characters.	nullable
seed	integer	Random seed for reproducibility. If None, a random seed is chosen.	nullable
enable_safety_checker	boolean	If set to true, the safety checker will be enabled. Disabling it requires account authorization; unauthorized requests are always checked.	default: true
duration	enum	Duration of the generated video in seconds. R2V Flash supports only 5 or 10 seconds.	5 \| 10 · default: "5"
image_urls	string[]	Reference images for subject consistency (0-5 images). Combined with video_urls, total references cannot exceed 5. Formats: JPEG, JPG, PNG (no alpha), BMP, WEBP. Resolution: 240-5000px. Max 10MB each. Reference order: image_urls continue numbering after video_urls.	nullable
generate_audio	boolean	Whether to generate a video with audio. Set to false for silent video generation. Silent videos are faster and cost 25% of the audio version price.	default: true
video_urls	string[]	Reference videos for subject consistency (0-3 videos). Videos' FPS must be at least 16 FPS. Combined with image_urls, total references cannot exceed 5. Reference order: video_urls are numbered first (Character1, Character2...), then image_urls continue the sequence.	nullable
aspect_ratio	enum	The aspect ratio of the generated video.	16:9 \| 9:16 \| 1:1 \| 4:3 \| 3:4 · default: "16:9"
enable_prompt_expansion	boolean	Whether to enable prompt rewriting using LLM.	default: true
multi_shots	boolean	When true (default), enables intelligent multi-shot segmentation for coherent narrative videos with multiple shots. When false, generates single continuous shot. Only active when enable_prompt_expansion is True.	default: true
resolution	enum	Video resolution tier. R2V Flash only supports 720p and 1080p.	720p \| 1080p · default: "1080p"

Validate a payload

before you spend tokens

shell

$ curl -X POST https://modelschemas.com/v1/validate \
    -d '{"provider":"fal","endpointId":"wan/v2.6/reference-to-video/flash","payload":{…}}'
→ {"valid": false, "errors": [{"path": "#", "keyword": "required", …}]}