FLUX 3 Video Extend continues input videos into new 5-20 second clips, using prompt guidance to control the next action, camera movement, visual style, motion continuity, and optional synchronized audio at 720P / 1080P output.
Every plan, free included. Runs spend your account’s credits.
The smallest request that works: the required fields only.
Percify APIcurl https://api.percify.io/v3/playground/v1/run \
-H "Authorization: Bearer $PERCIFY_API_TOKEN" \
-H "Content-Type: application/json" \
-d '{
"modelId": "flux-3-video-extend",
"input": {
"prompt": "A red fox running through fresh snow at sunrise",
"video": "https://example.com/clip.mp4"
}
}'6 fields in input, required first.
videoRequiredURL of the input video. MP4, under 50 MB and under 15 seconds.
promptRequiredThe text prompt describing the video you want to generate.
durationOptionalVideo length in seconds (5-20).
resolutionOptionalResolution of the generated video.
aspect_ratioOptionalThe aspect ratio of the generated media.
generate_audio
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Pick a use case, run it in the playground, copy the call.
Every plan, free included. Runs spend your account’s credits.
Whether to generate audio for the video.