GET

/v1/schemas/fal/video/fal-ai%2Fffmpeg-api%2Fmerge-audio-video

Accept:

kind inputactivity videohash de1ee144…extracted Jul 6, 2026version currentsource upstream spec ↗

Request body

3 properties · 2 required · 0 $defs

property	type	description	constraints
audio_url*	string	URL of the audio file to use as the audio track
video_url*	string	URL of the video file to use as the video track
start_offset	number	Offset in seconds for when the audio should start relative to the video	n ≥ 0 · default: 0

Validate a payload

before you spend tokens

shell

$ curl -X POST https://modelschemas.com/v1/validate \
    -d '{"provider":"fal","endpointId":"fal-ai/ffmpeg-api/merge-audio-video","payload":{…}}'
→ {"valid": false, "errors": [{"path": "#", "keyword": "required", …}]}