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Black Forest Labs/flux-3.0-video-extend
flux-3.0-video-extend
Try FLUX 3 free with the Video Extend API by Black Forest Labs. Extend videos with native audio, visual consistency, expressive motion, and coherent scenes. Up to 20 seconds.
Video Edit
API Examples
Submit Example
// Step 1: Submit generation request
const response = await fetch('https://api.flaq.ai/api/v1/video/task', {
method: 'POST',
headers: {
'Content-Type': 'application/json',
'Authorization': 'Bearer YOUR_API_KEY'
},
body: JSON.stringify({
model_name: 'flux-3.0-video-extend',
prompt: 'Continue the scene as the subject walks toward the skyline',
resolution: '1080p',
aspect_ratio: '16:9',
video_url: 'https://example.com/source-video.mp4',
duration: 10,
sound: true
})
});
const { data } = await response.json();
const taskId = data.task_id;
Polling Example
// Step 2: Poll for results
const taskId = data.task_id;
const pollResult = async (taskId) => {
const res = await fetch(`https://api.flaq.ai/api/v1/video/${taskId}`, {
headers: { 'Authorization': 'Bearer YOUR_API_KEY' }
});
return res.json();
};
while (true) {
const pollResultData = await pollResult(taskId);
const status = pollResultData.data.task_status;
if (status === 'succeed') {
console.log(pollResultData.data.task_result.videos[0].url);
break;
}
if (status === 'failed') {
console.error(pollResultData.data.task_status_msg);
break;
}
await new Promise(resolve => setTimeout(resolve, 10000));
}
Submit Example
# Step 1: Submit generation request
import requests
response = requests.post(
'https://api.flaq.ai/api/v1/video/task',
headers={
'Content-Type': 'application/json',
'Authorization': 'Bearer YOUR_API_KEY'
},
json={
'model_name': 'flux-3.0-video-extend',
'prompt': 'Continue the scene as the subject walks toward the skyline',
'resolution': '1080p',
'aspect_ratio': '16:9',
'video_url': 'https://example.com/source-video.mp4',
'duration': 10,
'sound': True
}
)
result = response.json()
task_id = result['data']['task_id']
Polling Example
# Step 2: Poll for results
task_id = response.json()['data']['task_id']
poll_url = f"https://api.flaq.ai/api/v1/video/{task_id}"
while True:
poll_result = requests.get(poll_url, headers={'Authorization': 'Bearer YOUR_API_KEY'}).json()
status = poll_result['data']['task_status']
if status == 'succeed':
print(poll_result['data']['task_result']['videos'][0]['url'])
break
if status == 'failed':
print(poll_result['data']['task_status_msg'])
break
time.sleep(10)
Submit Example
# Step 1: Submit generation request
curl -X POST https://api.flaq.ai/api/v1/video/task \
-H "Content-Type: application/json" \
-H "Authorization: Bearer YOUR_API_KEY" \
-d '{
"model_name": "flux-3.0-video-extend",
"prompt": "Continue the scene as the subject walks toward the skyline",
"resolution": "1080p",
"aspect_ratio": "16:9",
"video_url": "https://example.com/source-video.mp4",
"duration": 10,
"sound": true
}'
Polling Example
# Step 2: Poll for results
# Replace {task_id} with the task_id returned from the submit response
curl -X GET "https://api.flaq.ai/api/v1/video/{task_id}" \
-H "Authorization: Bearer YOUR_API_KEY"
Try the AI Video Generator now
FLUX 3 Video Extend Pricing
| Parameters | Price | Original Price | Discount |
|---|
README
Seamless FLUX 3 Video Extend API with Native Audio
Black Forest Labs FLUX 3 Video Extend API continues an existing clip with newly generated motion and optional native audio. The model carries forward the source video's final visual state, momentum, framing, and scene logic, then follows natural-language direction to develop the next moment. Through Flaq AI, developers and production teams can extend stories, lengthen campaign assets, continue character action, and build connected video sequences without restarting from a static frame.
Key Features of FLUX 3 Video Extend API
- Prompt-Guided Video Continuation: Continue an uploaded clip from its ending while directing the next action, camera movement, setting, and narrative development.
- Motion and Framing Continuity: Carry forward visual momentum, composition, subject placement, and camera logic for a more coherent extension.
- Optional Native Audio Continuation: Generate speech, effects, and ambience that follow the source scene and support the newly created action.
- Character and Scene Consistency: Preserve central subjects, environments, visual style, and story context as the video moves into the next beat.
- Physics-Aware Evolution: Develop movement and events with stronger relationships between cause, impact, materials, and environmental response.
- Longer Multi-Clip Workflows: Build connected stories by extending selected clips and combining them into broader sequences or multi-shot productions.
- Prompt-Directed Story Development: Shape the next action, camera path, dialogue, atmosphere, and narrative beat while preserving the source scene's context.
How to Use FLUX 3 Video Extend API on Flaq AI
- Input: A supported source video and a natural-language prompt describing how the action, camera, environment, dialogue, and sound should continue.
- Output: A high-quality continued video delivered through secure CDN URLs for editing, publishing, or automated processing.
- Continuation Guidance: The source clip supplies the final frame, motion context, visual style, and scene state used to begin the extension.
- Continuation Direction: Describe how action, camera movement, environment, dialogue, sound, and story should develop after the source clip ends.
- Capabilities: Video continuation, motion consistency, prompt-guided scene development, optional native audio, character continuity, and connected storytelling.
Best Use Cases for FLUX 3 Video Extend API Integration
- Longer Narrative Sequences: Continue scenes one beat at a time for short films, episodic content, story experiments, and multi-shot creative projects.
- Advertising and Campaign Expansion: Lengthen product films, branded clips, and promotional assets with additional action or a stronger closing moment.
- Character and Performance Continuation: Extend dialogue, movement, and scene reactions while carrying recognizable subjects into the next part of the sequence.
- Social Content Adaptation: Develop alternate endings, longer cuts, and follow-on moments from existing short-form video assets.
- Automated Editing Pipelines: Add generative continuation to creative software, media tools, agentic workflows, and scalable content production systems.
Note
Please ensure source videos, prompts, and content generated with FLUX 3 comply with Black Forest Labs' usage and safety requirements. Use a clear continuation prompt and a source clip with a stable final moment for more predictable results.
FLUX 3 Video Extend vs Competitors: Comparative Analysis
-
Video Extend vs. FLUX 3 Text-to-Video
Text-to-Video creates a new clip from a written concept. Video Extend begins from an existing sequence and carries its final frame, motion, framing, and scene logic into the next generated moment. -
FLUX 3 vs. Veo 3.1 Scene Extension
Veo 3.1 offers scene extension within Google's video ecosystem. FLUX 3 provides a separate API workflow that combines prompt-guided continuation with optional native audio and a unified model of audiovisual events. -
FLUX 3 vs. Runway Video Workflows
Runway offers video generation and editing through a broad creative platform. FLUX 3 Video Extend focuses on carrying an existing clip forward with scene-aware motion, framing, and optional sound. -
FLUX 3 vs. Seedance 2.0 Video Extension
Seedance 2.0 supports multimodal video continuation and editing with rich reference inputs. FLUX 3 offers an alternative grounded in unified image, video, and audio learning with emphasis on connected scene logic. -
FLUX 3 vs. Kling 3.0
Kling 3.0 provides controllable video generation for cinematic and character-focused workflows. FLUX 3 distinguishes its continuation route through optional native audio, multimodal world modeling, and prompt-directed extension from a source clip.
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