Lyrics Video Maker Free Online

Turn a 3-minute MP3 song with a text file of lyrics into 1080p animated lyrics videos just by typing what you need. Whether it's creating lyric-synced videos...

Security Scan

The skill's declared token requirement and API calls are consistent with a remote lyrics-video rendering service; nothing indicates it is trying to access unrelated credentials or install code on the host, but there is a small metadata inconsistency you should check before trusting it with sensitive tokens or copyrighted media.

Purpose & Capability

The name/description (create synced lyric videos) matches the runtime instructions: calls to a nemovideo API, upload endpoints, render/export flow, and use of an API token (NEMO_TOKEN) are expected. One minor inconsistency: the SKILL.md frontmatter declares a config path (~/.config/nemovideo/) while the registry metadata earlier listed no required config paths—this could be an oversight but should be clarified.

Instruction Scope

Instructions are scoped to creating sessions, uploading media, streaming SSE edits, polling render status, and handling credits/errors. They do not instruct the agent to read unrelated system files, global credentials, or user shell history. The skill tells the agent how to obtain an anonymous token and to save session_id; it also warns not to print tokens or raw JSON.

Install Mechanism

There is no install spec and no code files—this is instruction-only, which is the lowest install risk. Nothing is downloaded or written to disk by the skill itself in the provided instructions.

Credentials

The only declared credential is NEMO_TOKEN (primaryEnv), which is proportionate to the described API usage. Note the SKILL.md frontmatter mentions a config path (~/.config/nemovideo/) that could imply local token/config access; this conflicts with the registry metadata and should be confirmed. The skill also instructs generating an anonymous token via the service if no NEMO_TOKEN exists.

Persistence & Privilege

The skill does not request always:true and does not ask to modify other skills or system-wide settings. Session state (session_id) is kept for the interaction, which is appropriate for the service workflow.

Assessment

This skill appears to do what it says: it needs a NEMO_TOKEN to call nemovideo.ai endpoints and upload your audio/lyrics for server-side rendering. Before installing: (1) confirm whether you must provide a personal API token or can use the anonymous token flow (anonymous tokens are preferable if you don't trust the service); (2) verify the config-path mention (~/.config/nemovideo/) — clarify whether the agent will read or write files there; (3) avoid supplying high-privilege or reused credentials; (4) be aware you are uploading audio (copyrighted content risks and privacy implications); and (5) if you need stronger guarantees, ask for the vendor/homepage and privacy/security policy, or test with throwaway data/tokens first.

Getting Started

Share your audio files and I'll get started on lyrics video creation. Or just tell me what you're thinking.

Try saying:

• "create my audio files"
• "export 1080p MP4"
• "sync these lyrics to the song"

Automatic Setup

On first interaction, connect to the processing API before doing anything else. Show a brief status like "Setting things up...".

Token: If NEMO_TOKEN environment variable is already set, use it and skip to Session below.

Free token: Generate a UUID as client identifier, then POST to https://mega-api-prod.nemovideo.ai/api/auth/anonymous-token with header X-Client-Id: <uuid>. The response field data.token becomes your NEMO_TOKEN (100 credits, 7-day expiry).

Session: POST to https://mega-api-prod.nemovideo.ai/api/tasks/me/with-session/nemo_agent with Bearer auth and body {"task_name":"project"}. Save session_id from the response.

Confirm to the user you're connected and ready. Don't print tokens or raw JSON.

Lyrics Video Maker Free Online — Turn Songs into Lyric Videos

Send me your audio files and describe the result you want. The lyrics video creation runs on remote GPU nodes — nothing to install on your machine.

A quick example: upload a 3-minute MP3 song with a text file of lyrics, type "sync these lyrics to the song and animate the text on a dark background", and you'll get a 1080p MP4 back in roughly 1-2 minutes. All rendering happens server-side.

Worth noting: shorter songs with clean lyric text files sync more accurately and process faster.

Matching Input to Actions

User prompts referencing lyrics video maker free online, aspect ratio, text overlays, or audio tracks get routed to the corresponding action via keyword and intent classification.

User says...	Action	Skip SSE?
"export" / "导出" / "download" / "send me the video"	→ §3.5 Export	✅
"credits" / "积分" / "balance" / "余额"	→ §3.3 Credits	✅
"status" / "状态" / "show tracks"	→ §3.4 State	✅
"upload" / "上传" / user sends file	→ §3.2 Upload	✅
Everything else (generate, edit, add BGM…)	→ §3.1 SSE	❌

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 — POST /api/tasks/me/with-session/nemo_agent with {"task_name":"project","language":"<lang>"}. Gives you a session_id.
2. Chat (SSE) — 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 — POST /api/upload-video/nemo_agent/me/<sid> — multipart file or JSON with URLs.
4. Credits — GET /api/credits/balance/simple — returns available, frozen, total.
5. State — GET /api/state/nemo_agent/me/<sid>/latest — current draft and media info.
6. Export — 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.

Three attribution headers are required on every request and must match this file's frontmatter:

Header	Value
X-Skill-Source	lyrics-video-maker-free-online
X-Skill-Version	frontmatter version
X-Skill-Platform	auto-detect: clawhub / cursor / unknown from install path

Every API call needs Authorization: Bearer <NEMO_TOKEN> plus the three attribution headers above. If any header is missing, exports return 402.

Draft field mapping: t=tracks, tt=track type (0=video, 1=audio, 7=text), sg=segments, d=duration(ms), m=metadata.

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]" / "点击"	Execute via API
"open [panel]" / "打开"	Query session state
"drag/drop" / "拖拽"	Send edit via SSE
"preview in timeline"	Show track summary
"Export button" / "导出"	Execute export workflow

Reading the SSE Stream

Text events go straight to the user (after GUI translation). Tool calls stay internal. Heartbeats and empty data: lines mean the backend is still working — show "⏳ Still working..." every 2 minutes.

About 30% of edit operations close the stream without any text. When that happens, poll /api/state to confirm the timeline changed, then tell the user what was updated.

Error Handling

Code	Meaning	Action
0	Success	Continue
1001	Bad/expired token	Re-auth via anonymous-token (tokens expire after 7 days)
1002	Session not found	New session §3.0
2001	No credits	Anonymous: show registration URL with ?bind=<id> (get <id> from create-session or state response when needed). Registered: "Top up credits in your account"
4001	Unsupported file	Show supported formats
4002	File too large	Suggest compress/trim
400	Missing X-Client-Id	Generate Client-Id and retry (see §1)
402	Free plan export blocked	Subscription tier issue, NOT credits. "Register or upgrade your plan to unlock export."
429	Rate limit (1 token/client/7 days)	Retry in 30s once

Tips and Tricks

The backend processes faster when you're specific. Instead of "make it look better", try "sync these lyrics to the song and animate the text on a dark background" — concrete instructions get better results.

Max file size is 200MB. Stick to MP3, WAV, FLAC, AAC for the smoothest experience.

Export as MP4 for widest compatibility across YouTube, Instagram, and TikTok.

Common Workflows

Quick edit: Upload → "sync these lyrics to the song and animate the text on a dark background" → Download MP4. Takes 1-2 minutes 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.