# BGM Looper (Extend to Length) — yeezhan.com
> One-time pay-per-task emergency tool to make your file ready for submission.
> No credits, no balance. One payment unlocks one task result, valid for 24 hours.

Tool domain: https://audio-loop-bgm.yeezhan.com
Skill definition: https://audio-loop-bgm.yeezhan.com/skill/SKILL.md
API documentation: https://audio-loop-bgm.yeezhan.com/api/docs

## What this tool does
Stretch a short BGM loop to any video length — clips join seamlessly, loop until the target, fade out at the end.

## Typical user problems
- Your video is 4 minutes but the BGM loop is 12 seconds — copying and pasting in an editor is fiddly and the seam always lands audibly. All clips are resampled to one format and joined seamlessly, the joined loop repeats until it fills the target duration, and the last two seconds fade out for a clean ending.

## Parameters
- target_sec: number (range 1-600s), required. 目标时长

## Pricing
- Watermarked preview: free, no login required
- Final clean output: $0.99 one-time per task
- Require login (email/phone OTP) to complete payment
- Result available for download 24 hours after payment

## Limitations
- Max 200 MB