Sfx 1.6 Video to Video | AI Video Dubbing API

Mirelo AI SFX 1.6 Video-to-Video

Mirelo AI SFX 1.6 Video-to-Video generates synchronized sound effects for an uploaded video, with optional prompt guidance, multiple variations, and seed control for reproducibility. It is designed for adding or redesigning audio for short videos, trailers, demos, gameplay clips, and other visual content workflows.

Why Choose This?

Video-to-sound workflow Generate synchronized sound effects directly from video input.
Prompt-guided audio generation Add an optional text prompt to steer the type, mood, or intensity of the generated sound effects.
Multiple variations Generate up to 4 variations in one request with num_samples.
Flexible audio duration Choose how many seconds of SFX audio to generate, up to 60 seconds.
Seed support Use seed for more reproducible results, or -1 for random generation.
Production-ready API Useful for sound design, trailer audio, short-form video, social content, and creative audio workflows.

Parameters

Parameter	Required	Description
video	Yes	Video URL or uploaded video to add synchronized sound effects to.
prompt	No	Optional text prompt to guide the generated sound effects.
duration	No	Duration of the generated SFX audio in seconds. Range: `1–60`. Default: `10`. This does not extend the input video.
num_samples	No	Number of variations to generate. Range: `1–4`. Default: `1`.
seed	No	Seed for reproducibility. Use `-1` for a random seed. Default: `-1`.

How to Use

Upload your video — provide the source video you want to add sound effects to.
Add a prompt (optional) — describe the sound design, mood, or effect direction you want.
Set duration — choose how many seconds of synchronized SFX audio to generate.
Set number of samples — choose how many variations you want, from 1 to 4.
Set a seed (optional) — use -1 for random output, or a fixed value for more reproducible results.
Submit — run the model and download the generated audio outputs.

Example Prompt

Cinematic trailer sound design with deep impacts, airy risers, subtle whooshes, and tense low-end atmosphere

Pricing

Pricing is based on generated SFX duration and number of samples.

Duration	1 Sample	2 Samples	3 Samples	4 Samples
1s	$0.01	$0.02	$0.03	$0.04
5s	$0.05	$0.10	$0.15	$0.20
10s	$0.10	$0.20	$0.30	$0.40
20s	$0.20	$0.40	$0.60	$0.80
30s	$0.30	$0.60	$0.90	$1.20
60s	$0.60	$1.20	$1.80	$2.40

Billing Rules

Pricing is $0.01 per generated second
Pricing increases with both selected duration and num_samples
prompt and seed do not affect pricing
Billing is based on the generated SFX audio duration, not the source video duration
The selected duration does not extend the input video

Best Use Cases

Trailer and teaser sound design — Add cinematic effects to short video clips.
Social content enhancement — Generate sound layers for reels, shorts, and promotional videos.
Game and app previews — Add designed effects to gameplay or demo footage.
Prototype audio direction — Quickly explore multiple sound directions from the same video.
Creative post-production — Generate synced SFX for short-form editing workflows.

Pro Tips

Use a prompt only when you want stronger control over the sound style or mood.
Increase num_samples when you want multiple design options from the same clip.
Start with shorter durations for testing, then extend if the direction feels right.
Use a fixed seed when comparing prompt changes on the same source video.
Clear visual motion in the video usually helps produce more meaningful synchronized sound effects.

Notes

video is required.
duration supports 1–60 seconds.
num_samples supports 1–4.
seed = -1 means random generation.
The generated duration refers to the SFX audio length only and does not extend the uploaded video.
Pricing depends on generated duration and sample count.

Related Models

Mirelo AI SFX 1.6 Text-to-Audio — Generate sound effects or ambient audio directly from text prompts.
Mirelo AI SFX 1.6 Extend Audio — Extend an existing audio clip with newly generated continuation.
Mirelo AI SFX 1.6 Inpaint Audio — Regenerate a selected segment inside an existing audio clip.

Sfx 1.6 Video To Video API — Quick start

Grab a WaveSpeedAI API key, then call POST https://api.wavespeed.ai/api/v3/mirelo-ai/sfx-1.6/video-to-video with your input as JSON. The endpoint returns a prediction id; poll the prediction endpoint until status flips to completed, then read the output URL from data.outputs[0]. Examples for Sfx 1.6 Video To Video below.

HTTP example

# Submit the prediction
curl -X POST "https://api.wavespeed.ai/api/v3/mirelo-ai/sfx-1.6/video-to-video" \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer $WAVESPEED_API_KEY" \
  -d '{
    "video": "https://example.com/your-input.mp4",
    "prompt": "A cinematic shot of a city at sunset, soft golden light",
    "duration": 10,
    "num_samples": 1,
    "seed": -1
}'

# Response includes a prediction id. Poll for the result:
curl -X GET "https://api.wavespeed.ai/api/v3/predictions/{request_id}/result" \
  -H "Authorization: Bearer $WAVESPEED_API_KEY"

# When status is "completed", read the output from data.outputs[0].

Node.js example

// npm install wavespeed
const WaveSpeed = require('wavespeed');

const client = new WaveSpeed(); // reads WAVESPEED_API_KEY from env

const result = await client.run("mirelo-ai/sfx-1.6/video-to-video", {
        "video": "https://example.com/your-input.mp4",
        "prompt": "A cinematic shot of a city at sunset, soft golden light",
        "duration": 10,
        "num_samples": 1,
        "seed": -1
});

console.log(result.outputs[0]); // → URL of the generated output

Python example

# pip install wavespeed
import wavespeed

output = wavespeed.run(
    "mirelo-ai/sfx-1.6/video-to-video",
    {
    "video": "https://example.com/your-input.mp4",
    "prompt": "A cinematic shot of a city at sunset, soft golden light",
    "duration": 10,
    "num_samples": 1,
    "seed": -1
}
)

print(output["outputs"][0])  # → URL of the generated output

Sfx 1.6 Video To Video API — Frequently asked questions

What is the Sfx 1.6 Video To Video API?

Sfx 1.6 Video To Video is a Mirelo Ai model for AI inference, exposed as a REST API on WaveSpeedAI. Mirelo SFX1.6 Video to Audio is a fast AI audio generation model that creates synchronized sound effects for video and returns the video with a new audio track. Supports clips up to 60 seconds. Ready-to-use REST inference API for video sound design, synced SFX generation, game trailers, social media clips, cinematic videos, product demos, and professional audio-for-video workflows with simple integration, no coldstarts, and affordable pricing. You can call it programmatically or try it from the playground above.

How do I call the Sfx 1.6 Video To Video API?

POST your input parameters to the model's REST endpoint (shown in the API tab of this playground) with your WaveSpeedAI API key in the Authorization header. Submission returns a prediction ID; poll the prediction endpoint until status flips to "completed", then read the output URL from the result. The playground generates a ready-to-paste code sample in Python, JavaScript, or cURL for whatever inputs you've set. Full request/response shape is documented at https://wavespeed.ai/docs/docs-api/mirelo-ai/mirelo-ai-sfx-1.6-video-to-video.

How much does Sfx 1.6 Video To Video cost per run?

Sfx 1.6 Video To Video starts at $0.010 per run. That figure is the base price — the final charge scales with the parameters you set in the form (output size, length, count, references, or whatever knobs this model exposes), so a higher-quality or larger output costs more than a minimal one. The exact cost for your current input is shown live next to the Generate button before you submit, and the actual per-call charge is recorded on the prediction afterwards.

What inputs does Sfx 1.6 Video To Video accept?

Key inputs: `prompt`, `video`, `duration`, `seed`, `num_samples`. The full JSON schema (types, defaults, allowed values) is rendered above the Generate button and mirrored in the API reference at https://wavespeed.ai/docs/docs-api/mirelo-ai/mirelo-ai-sfx-1.6-video-to-video.

How do I get started with the Sfx 1.6 Video To Video API?

Sign up for a free WaveSpeedAI account to claim starter credits, copy your API key from /accesskey, then call the endpoint shown in the API tab of the playground. The playground also auto-generates a code sample in Python, JavaScript, or cURL for the parameters you've set.

Can I use Sfx 1.6 Video To Video outputs commercially?

Commercial usage rights depend on the model's license, set by its provider (Mirelo Ai). The license summary appears on the model card above; see WaveSpeedAI's Terms of Service for platform-level conditions.

ExamplesView all

Related Models

README

Mirelo AI SFX 1.6 Video-to-Video

Why Choose This?

Parameters

How to Use

Example Prompt

Pricing

Billing Rules

Best Use Cases

Pro Tips

Notes

Related Models

Sfx 1.6 Video To Video API — Quick start

Sfx 1.6 Video To Video API — Frequently asked questions