add video files into music-backed videos with this skill. Works with MP4, MOV, AVI, WebM files up to 500MB. content creators use it for adding background mus...
---
name: online-add-music
version: "1.0.0"
displayName: "Online Add Music β Add Music to Videos Online"
description: >
add video files into music-backed videos with this skill. Works with MP4, MOV, AVI, WebM files up to 500MB. content creators use it for adding background music to videos online β processing takes 20-40 seconds on cloud GPUs and you get 1080p MP4 files.
metadata: {"openclaw": {"emoji": "π΅", "requires": {"env": ["NEMO_TOKEN"], "configPaths": ["~/.config/nemovideo/"]}, "primaryEnv": "NEMO_TOKEN", "variant": "greeting_v2"}}
---
## Getting Started
> Got video files to work with? Send it over and tell me what you need β I'll take care of the music track addition.
**Try saying:**
- "add a 2-minute travel video clip into a 1080p MP4"
- "add background music to my video and adjust the volume to 30%"
- "adding background music to videos online for content creators"
### Quick Start Setup
This skill connects to a cloud processing backend. On first use, set up the connection automatically and let the user know ("Connecting...").
**Token check**: Look for `NEMO_TOKEN` in the environment. If found, skip to session creation. Otherwise:
- Generate a UUID as client identifier
- POST `https://mega-api-prod.nemovideo.ai/api/auth/anonymous-token` with `X-Client-Id` header
- Extract `data.token` from the response β this is your NEMO_TOKEN (100 free credits, 7-day expiry)
**Session**: POST `https://mega-api-prod.nemovideo.ai/api/tasks/me/with-session/nemo_agent` with Bearer auth and body `{"task_name":"project"}`. Keep the returned `session_id` for all operations.
Let the user know with a brief "Ready!" when setup is complete. Don't expose tokens or raw API output.
# Online Add Music β Add Music to Videos Online
Send me your video files and describe the result you want. The music track addition runs on remote GPU nodes β nothing to install on your machine.
A quick example: upload a 2-minute travel video clip, type "add background music to my video and adjust the volume to 30%", and you'll get a 1080p MP4 back in roughly 20-40 seconds. All rendering happens server-side.
Worth noting: trim your audio track to match the video length before uploading for a cleaner result.
## Matching Input to Actions
User prompts referencing online add music, aspect ratio, text overlays, or audio tracks get routed to the corresponding action via keyword and intent classification.
| User says... | Action | Skip SSE? |
|-------------|--------|----------|
| "export" / "ε―ΌεΊ" / "download" / "send me the video" | β Β§3.5 Export | β
|
| "credits" / "η§―ε" / "balance" / "δ½ι’" | β Β§3.3 Credits | β
|
| "status" / "ηΆζ" / "show tracks" | β Β§3.4 State | β
|
| "upload" / "δΈδΌ " / user sends file | β Β§3.2 Upload | β
|
| Everything else (generate, edit, add BGMβ¦) | β Β§3.1 SSE | β |
## Cloud Render Pipeline Details
Each export job queues on a cloud GPU node that composites video layers, applies platform-spec compression (H.264, up to 1080x1920), and returns a download URL within 30-90 seconds. The session token carries render job IDs, so closing the tab before completion orphans the job.
All calls go to `https://mega-api-prod.nemovideo.ai`. The main endpoints:
1. **Session** β `POST /api/tasks/me/with-session/nemo_agent` with `{"task_name":"project","language":"<lang>"}`. Gives you a `session_id`.
2. **Chat (SSE)** β `POST /run_sse` with `session_id` and your message in `new_message.parts[0].text`. Set `Accept: text/event-stream`. Up to 15 min.
3. **Upload** β `POST /api/upload-video/nemo_agent/me/<sid>` β multipart file or JSON with URLs.
4. **Credits** β `GET /api/credits/balance/simple` β returns `available`, `frozen`, `total`.
5. **State** β `GET /api/state/nemo_agent/me/<sid>/latest` β current draft and media info.
6. **Export** β `POST /api/render/proxy/lambda` with render ID and draft JSON. Poll `GET /api/render/proxy/lambda/<id>` every 30s for `completed` status and download URL.
Formats: mp4, mov, avi, webm, mkv, jpg, png, gif, webp, mp3, wav, m4a, aac.
Headers are derived from this file's YAML frontmatter. `X-Skill-Source` is `online-add-music`, `X-Skill-Version` comes from the `version` field, and `X-Skill-Platform` is detected from the install path (`~/.clawhub/` = `clawhub`, `~/.cursor/skills/` = `cursor`, otherwise `unknown`).
Every API call needs `Authorization: Bearer <NEMO_TOKEN>` plus the three attribution headers above. If any header is missing, exports return 402.
Draft JSON uses short keys: `t` for tracks, `tt` for track type (0=video, 1=audio, 7=text), `sg` for segments, `d` for duration in ms, `m` for metadata.
Example timeline summary:
```
Timeline (3 tracks): 1. Video: city timelapse (0-10s) 2. BGM: Lo-fi (0-10s, 35%) 3. Title: "Urban Dreams" (0-3s)
```
### Backend Response Translation
The backend assumes a GUI exists. Translate these into API actions:
| Backend says | You do |
|-------------|--------|
| "click [button]" / "ηΉε»" | Execute via API |
| "open [panel]" / "ζεΌ" | Query session state |
| "drag/drop" / "ζζ½" | Send edit via SSE |
| "preview in timeline" | Show track summary |
| "Export button" / "ε―ΌεΊ" | Execute export workflow |
### SSE Event Handling
| Event | Action |
|-------|--------|
| Text response | Apply GUI translation (Β§4), present to user |
| Tool call/result | Process internally, don't forward |
| `heartbeat` / empty `data:` | Keep waiting. Every 2 min: "β³ Still working..." |
| Stream closes | Process final response |
~30% of editing operations return no text in the SSE stream. When this happens: poll session state to verify the edit was applied, then summarize changes to the user.
### Error Codes
- `0` β success, continue normally
- `1001` β token expired or invalid; re-acquire via `/api/auth/anonymous-token`
- `1002` β session not found; create a new one
- `2001` β out of credits; anonymous users get a registration link with `?bind=<id>`, registered users top up
- `4001` β unsupported file type; show accepted formats
- `4002` β file too large; suggest compressing or trimming
- `400` β missing `X-Client-Id`; generate one and retry
- `402` β free plan export blocked; not a credit issue, subscription tier
- `429` β rate limited; wait 30s and retry once
## Tips and Tricks
The backend processes faster when you're specific. Instead of "make it look better", try "add background music to my video and adjust the volume to 30%" β concrete instructions get better results.
Max file size is 500MB. Stick to MP4, MOV, AVI, WebM for the smoothest experience.
Export as MP4 for widest compatibility.
## Common Workflows
**Quick edit**: Upload β "add background music to my video and adjust the volume to 30%" β Download MP4. Takes 20-40 seconds for a 30-second clip.
**Batch style**: Upload multiple files in one session. Process them one by one with different instructions. Each gets its own render.
**Iterative**: Start with a rough cut, preview the result, then refine. The session keeps your timeline state so you can keep tweaking.
don't have the plugin yet? install it then click "run inline in claude" again.