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mhogan2013-9

Free Image Text

作者 mhogan2013-9 · GitHub ↗ · v1.0.0 · MIT-0
cross-platform ✓ 安全检测通过
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在 OpenClaw 中安装
/install free-image-text
功能描述
Get text-overlaid videos ready to post, without touching a single slider. Upload your images with text (JPG, PNG, WEBP, PDF, up to 200MB), say something like...
使用说明 (SKILL.md)

Getting Started

Send me your images with text and I'll handle the text extraction generation. Or just describe what you're after.

Try saying:

  • "convert a product photo with a price tag or a scanned document image into a 1080p MP4"
  • "extract the text from this image and overlay it as captions on my video"
  • "extracting text from images and adding it as on-screen captions or subtitles to videos for content creators, marketers, students"

Getting Connected

Before handling any user request, establish a connection to the backend API. Show a brief status like "Connecting...".

If NEMO_TOKEN is in the environment, use it directly and create a session. Otherwise, acquire a free starter token:

  • Generate a UUID as client identifier
  • POST to https://mega-api-prod.nemovideo.ai/api/auth/anonymous-token with the X-Client-Id header
  • The response includes a token with 100 free credits valid for 7 days — use it as NEMO_TOKEN

Then create a session by POSTing to https://mega-api-prod.nemovideo.ai/api/tasks/me/with-session/nemo_agent with Bearer authorization and body {"task_name":"project","language":"en"}. The session_id in the response is needed for all following requests.

Tell the user you're ready. Keep the technical details out of the chat.

Free Image Text — Extract image text into video

Drop your images with text in the chat and tell me what you need. I'll handle the text extraction generation on cloud GPUs — you don't need anything installed locally.

Here's a typical use: you send a a product photo with a price tag or a scanned document image, ask for extract the text from this image and overlay it as captions on my video, and about 20-40 seconds later you've got a MP4 file ready to download. The whole thing runs at 1080p by default.

One thing worth knowing — higher contrast images produce more accurate text extraction results.

Matching Input to Actions

User prompts referencing free image text, 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.

Base URL: https://mega-api-prod.nemovideo.ai

Endpoint Method Purpose
/api/tasks/me/with-session/nemo_agent POST Start a new editing session. Body: {"task_name":"project","language":"\x3Clang>"}. Returns session_id.
/run_sse POST Send a user message. Body includes app_name, session_id, new_message. Stream response with Accept: text/event-stream. Timeout: 15 min.
/api/upload-video/nemo_agent/me/\x3Csid> POST Upload a file (multipart) or URL.
/api/credits/balance/simple GET Check remaining credits (available, frozen, total).
/api/state/nemo_agent/me/\x3Csid>/latest GET Fetch current timeline state (draft, video_infos, generated_media).
/api/render/proxy/lambda POST Start export. Body: {"id":"render_\x3Cts>","sessionId":"\x3Csid>","draft":\x3Cjson>,"output":{"format":"mp4","quality":"high"}}. Poll status every 30s.

Accepted file types: 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 free-image-text, 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).

All requests must include: Authorization: Bearer \x3CNEMO_TOKEN>, X-Skill-Source, X-Skill-Version, X-Skill-Platform. Missing attribution headers will cause export to fail with 402.

Error Codes

  • 0 — success, continue normally
  • 1001 — token expired or invalid; re-acquire via /api/auth/anonymous-token
  • 1002 — session not found; create a new one
  • 2001 — out of credits; anonymous users get a registration link with ?bind=\x3Cid>, registered users top up
  • 4001 — unsupported file type; show accepted formats
  • 4002 — file too large; suggest compressing or trimming
  • 400 — missing X-Client-Id; generate one and retry
  • 402 — free plan export blocked; not a credit issue, subscription tier
  • 429 — rate limited; wait 30s and retry once

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.

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

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)

Common Workflows

Quick edit: Upload → "extract the text from this image and overlay it as captions on my video" → 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.

Tips and Tricks

The backend processes faster when you're specific. Instead of "make it look better", try "extract the text from this image and overlay it as captions on my video" — concrete instructions get better results.

Max file size is 200MB. Stick to JPG, PNG, WEBP, PDF for the smoothest experience.

Export as MP4 for widest compatibility.

安全使用建议
This skill uploads any images you provide to an external service (mega-api-prod.nemovideo.ai) to extract text and render videos. Before installing/use: (1) confirm you trust that external service with the image content (avoid sending sensitive PII or credentials in images); (2) provide a NEMO_TOKEN only if you trust the provider, otherwise the skill will request an anonymous 7‑day token from the public endpoint; (3) note the skill may read its install path to set an attribution header (minor metadata mismatch with the declared config path), and it will make network calls and store session tokens for rendering — revoke tokens if you suspect misuse. If you need stronger guarantees about where data is stored or retention, contact the service owner or avoid sending sensitive images.
功能分析
Type: OpenClaw Skill Name: free-image-text Version: 1.0.0 The skill acts as a legitimate wrapper for a cloud-based video processing service hosted at nemovideo.ai. It facilitates image-to-video text extraction by managing API sessions, file uploads, and rendering tasks. While it requires an environment variable (NEMO_TOKEN) and interacts with external endpoints, its behavior is transparently documented and strictly aligned with its stated purpose of video generation for content creators.
能力评估
Purpose & Capability
Name/description (extract text from images and overlay as video captions) align with required credentials (NEMO_TOKEN) and the API endpoints described; no unrelated credentials or binaries are requested.
Instruction Scope
SKILL.md confines actions to the nemovideo API (session creation, upload, render, SSE polling). It will upload user files to the external service and may obtain an anonymous token if NEMO_TOKEN is not present. A minor mismatch: metadata advertises a config path (~/.config/nemovideo/) and X-Skill-Platform detection based on install paths, but the instructions do not explicitly describe reading that config path — this is plausible (for cached tokens) but worth noting.
Install Mechanism
Instruction-only skill with no install spec and no code files — nothing is written to disk by an installer; lowest install risk.
Credentials
Only NEMO_TOKEN is required (primaryEnv). The instructions explain using an anonymous-token endpoint when no token is present. No other unrelated secrets or credentials are requested.
Persistence & Privilege
always is false, model invocation is allowed (normal). The skill does not request elevated or persistent system privileges and does not modify other skills' configurations.
如何使用
  1. 确保已安装 OpenClaw(本地或 Docker 部署)
  2. 在对话框中输入安装命令:/install free-image-text
  3. 安装完成后,直接呼叫该 Skill 的名称或使用 /free-image-text 触发
  4. 根据 Skill 的参数说明提供必要输入,即可获得结构化输出
版本历史
v1.0.0
Initial release — extract text from images and overlay it on videos in one seamless workflow. - Upload images (JPG, PNG, WEBP, PDF, up to 200MB) and generate 1080p MP4 videos with extracted text as captions. - Automatic session and token management; 100 free credits for new users. - Simple chat interface — just upload and describe what you want. - Supports common video, audio, and image formats for upload and export. - Tracks your status and credits, and summarizes project timelines for easy edits and exports.
元数据
Slug free-image-text
版本 1.0.0
许可证 MIT-0
累计安装 0
当前安装数 0
历史版本数 1
常见问题

Free Image Text 是什么?

Get text-overlaid videos ready to post, without touching a single slider. Upload your images with text (JPG, PNG, WEBP, PDF, up to 200MB), say something like... 它是一个面向 Claude Code / OpenClaw 的 AI Agent Skill 插件,目前累计下载 85 次。

如何安装 Free Image Text?

在 OpenClaw 或 Claude Code 对话框中运行命令「/install free-image-text」即可一键安装,无需额外配置。

Free Image Text 是免费的吗?

是的,Free Image Text 完全免费,采用 MIT-0 许可证,可自由下载、安装和使用。

Free Image Text 支持哪些平台?

Free Image Text 跨平台运行,可在任意部署了 OpenClaw / Claude Code 的环境中使用(cross-platform)。

谁开发了 Free Image Text?

由 mhogan2013-9(@mhogan2013-9)开发并维护,当前版本 v1.0.0。

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