{"tool_key":"video","description":"Generate a video from a text prompt and/or reference files (image-to-video, video-to-video, lipsync, upscale).","input_schema":{"$schema":"https://json-schema.org/draft/2020-12/schema","type":"object","properties":{"model":{"type":"string","minLength":1},"prompt":{"type":"string","maxLength":20000},"aspect_ratio":{"type":"string"},"files":{"maxItems":50,"type":"array","items":{"type":"object","properties":{"url":{"type":"string","format":"uri"},"media_type":{"type":"string"}},"required":["url"],"additionalProperties":false}},"options":{"type":"object","properties":{"webhook_url":{"type":"string","format":"uri"},"cache":{"type":"boolean"}},"additionalProperties":{}},"resolution":{"description":"Quality tier. Supported by this model: 480p, 720p, 1080p, 4k. Unsupported tiers fall back to the nearest available.","type":"string","enum":["480p","720p","1080p","4k"]},"audio":{"description":"Native audio track request. Not supported by this model — ignored if sent.","type":"boolean"},"duration":{"description":"Length in seconds. Supported by this model's routes: fal: number 0.71-15. A non-numeric value such as \"auto\" is routed to a route whose schema accepts it; when none does, the request is rejected.","anyOf":[{"type":"number","minimum":1,"maximum":120},{"type":"string"}]},"provider_options":{"type":"object","properties":{"fal":{"type":"object","properties":{"seed":{"anyOf":[{"type":"integer","minimum":-9007199254740991,"maximum":9007199254740991},{"type":"null"}]},"output":{"type":"string","enum":["extended","continuation"]},"prompt":{"type":"string","description":"What happens next. Describe the continuation, not the source."},"duration":{"type":"number","minimum":0.71,"maximum":15,"description":"Seconds of new footage to add. The continuation clip also includes 1.625 seconds from the source's ending and may be longer because of frame rounding."},"video_url":{"type":"string","description":"URL of the video to extend. Must be 1.625 s to 60 s long, up to 50 MB, aspect ratio between 0.4 and 2.5."},"resolution":{"type":"string","enum":["480P","768P","1080P","2K"]},"aspect_ratio":{"type":"string","enum":["auto","21:9","16:9","4:3","1:1","3:4","9:16"]},"reference_audio_urls":{"type":"array","items":{"type":"string"}},"enable_safety_checker":{"type":"boolean","description":"Moderate the source video and the prompt."},"enable_prompt_expansion":{"type":"boolean","description":"Automatically enhance the prompt using the source video to help keep the continuation consistent. May increase processing time."}},"additionalProperties":false}},"additionalProperties":false}},"required":["model"],"additionalProperties":false},"output_schema":{"$schema":"https://json-schema.org/draft/2020-12/schema","type":"object","properties":{"version":{"type":"string","const":"v1"},"outputs":{"type":"array","items":{"type":"object","properties":{"url":{"type":"string"},"file_id":{"type":"string"},"media_type":{"type":"string"},"size_bytes":{"type":"number"},"raw":{}},"required":["url"],"additionalProperties":false}}},"required":["version","outputs"],"additionalProperties":false},"example":{"input":{"model":"kling-v3","prompt":"a cat jumping over a fence, cinematic","aspect_ratio":"16:9","duration":5},"output":{"version":"v1","outputs":[{"url":"https://s3.varg.ai/o/job_abc123.mp4","media_type":"video/mp4","size_bytes":52428800}]}}}