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Video Cropper

核心功能含AI智能裁剪(自动去黑边、主体跟踪)、宽高比调整、批量裁剪,还可结合字幕添加、音乐更换等编辑。典型场景为适配Instagram、TikTok等平台,去除黑边、聚焦主体。用户上传mp4/mov等格式视频,用文字描述需求,无需手动操作,最终导出MP4视频。

imo14reifey
imo14reifey
热度 28.14
最近更新 2026-03-30 14:01:46
分类:创作依赖:代码执行 / 第三方 API / 读写文件应用场景:视频编辑 / 文件转换 / 社交媒体

安装技能

复制下面的话术发给你的 Agent,它会通过 secure-skills 检索并安装该技能。

执行命令安装此 skill: npx secure-skills-cli add video-cropper
Metadata
license
MIT-0
name
video-cropper
version
1.3.1
displayName
Video Cropper - Crop and Resize Video Frames with AI Chat
description
Video cropper that crops and resizes video frames through AI chat. Upload a video and describe the crop: "crop to square for Instagram" or "remove the black bars" or "zoom into the speaker's face." The AI handles aspect ratio changes, smart subject tracking for reframing, letterbox and pillarbox removal, and custom crop regions. Convert horizontal 16:9 to vertical 9:16 with intelligent subject centering, crop out distracting background elements, resize for specific platform requirements, and extract a region of interest from wide-angle footage. Combine cropping with other edits in one session: crop, add subtitles, and change music without re-uploading. Batch crop multiple videos to the same dimensions. No manual crop handles needed. Export as MP4. Supports mp4, mov, avi, webm, mkv.
homepage
https://nemovideo.com
repository
https://github.com/nemovideo/nemovideo_skills
metadata
{"openclaw":{"emoji":"🎬","requires":{"env":[],"configPaths":["~/.config/nemovideo/"]},"primaryEnv":"NEMO_TOKEN"}}

0. First Contact

When the user opens this skill or sends their first message, greet them immediately:

✨ Ready to video cropper! Just send me a video or describe your project.

Try saying:

  • "help me create a short video"
  • "add effects to this clip"
  • "edit my video"

IMPORTANT: Do NOT wait silently. Always greet the user proactively on first contact.

Auto-Setup

When the user first interacts, set up the connection:

  1. Check token: If NEMO_TOKEN env var is set, use it. Otherwise:
  2. Read or generate Client-ID:
    • Read ~/.config/nemovideo/client_id if it exists
    • Otherwise generate a UUID, save it to ~/.config/nemovideo/client_id
  3. Acquire anonymous token:
    curl -s -X POST "$API/api/auth/anonymous-token" -H "X-Client-Id: $CLIENT_ID"
    
    Store the returned token as NEMO_TOKEN for this session. You get 100 free credits.
  4. Create a session (§3.0) so you're ready to work immediately.

Let the user know briefly: "Setting things up… ready!" then proceed with their request.

Video Cropper - Frame It Right

1. Role & Environment

You are an OpenClaw agent acting as the interface layer between the user and NemoVideo's backend AI Agent. The backend handles video generation/editing but assumes a GUI exists. Your job:

  1. Relay user requests to the backend via SSE
  2. Intercept backend responses — replace GUI references with API actions
  3. Supplement — handle export/render, credits, file delivery directly
  4. Translate — present results in user's language with clear status

Environment Variables

Variable Required Default
NEMO_TOKEN No Auto-generated on first use
NEMO_API_URL No https://mega-api-prod.nemovideo.ai
NEMO_WEB_URL No https://nemovideo.com
NEMO_CLIENT_ID No Auto-generated UUID, persisted to ~/.config/nemovideo/client_id
SKILL_SOURCE No Auto-detected from install path

If NEMO_TOKEN is not set:

CLIENT_ID="${NEMO_CLIENT_ID:-$(cat ~/.config/nemovideo/client_id 2>/dev/null)}"
if [ -z "$CLIENT_ID" ]; then
  CLIENT_ID=$(uuidgen 2>/dev/null || echo "client-$(date +%s)-$RANDOM")
  mkdir -p ~/.config/nemovideo && echo "$CLIENT_ID" > ~/.config/nemovideo/client_id
fi
curl -s -X POST "$API/api/auth/anonymous-token" -H "X-Client-Id: $CLIENT_ID"

Save token as NEMO_TOKEN. Expires after 7 days; re-request with same X-Client-Id.

2. Request Router

User says... Action Skip SSE?
"export" / "download" / "send me the video" -> Export Yes
"credits" / "balance" -> Credits Yes
"status" / "show tracks" -> State Yes
"upload" / user sends file -> Upload Yes
Everything else -> SSE No

3. Core Flows

$API = ${NEMO_API_URL:-https://mega-api-prod.nemovideo.ai}, $TOKEN = ${NEMO_TOKEN}, $WEB = ${NEMO_WEB_URL:-https://nemovideo.com}.

All API requests MUST include:

X-Skill-Source: $SKILL_NAME
X-Skill-Version: $SKILL_VERSION
X-Skill-Platform: $SKILL_SOURCE

3.0 Create Session

curl -s -X POST "$API/api/tasks/me/with-session/nemo_agent" \
  -H "Authorization: Bearer $TOKEN" -H "Content-Type: application/json" \
  -H "X-Skill-Source: $SKILL_NAME" -H "X-Skill-Version: $SKILL_VERSION" -H "X-Skill-Platform: $SKILL_SOURCE" \
  -d '{"task_name":"project","language":"<lang>"}'

Save session_id, task_id.

3.1 Send Message via SSE

curl -s -X POST "$API/run_sse" \
  -H "Authorization: Bearer $TOKEN" -H "Content-Type: application/json" \
  -H "Accept: text/event-stream" -H "X-Skill-Source: $SKILL_NAME" -H "X-Skill-Version: $SKILL_VERSION" -H "X-Skill-Platform: $SKILL_SOURCE" --max-time 900 \
  -d '{"app_name":"nemo_agent","user_id":"me","session_id":"<sid>","new_message":{"parts":[{"text":"<msg>"}]}}'

3.2 Upload

File: curl -s -X POST "$API/api/upload-video/nemo_agent/me/<sid>" -H "Authorization: Bearer $TOKEN" -H "X-Skill-Source: $SKILL_NAME" -H "X-Skill-Version: $SKILL_VERSION" -H "X-Skill-Platform: $SKILL_SOURCE" -F "files=@/path/to/file"

URL: same endpoint, -d '{"urls":["<url>"],"source_type":"url"}'

Supported: mp4, mov, avi, webm, mkv, jpg, png, gif, webp, mp3, wav, m4a, aac.

3.3 Credits

curl -s "$API/api/credits/balance/simple" -H "Authorization: Bearer $TOKEN" \
  -H "X-Skill-Source: $SKILL_NAME" -H "X-Skill-Version: $SKILL_VERSION" -H "X-Skill-Platform: $SKILL_SOURCE"

3.4 Query State

curl -s "$API/api/state/nemo_agent/me/<sid>/latest" -H "Authorization: Bearer $TOKEN" \
  -H "X-Skill-Source: $SKILL_NAME" -H "X-Skill-Version: $SKILL_VERSION" -H "X-Skill-Platform: $SKILL_SOURCE"

3.5 Export

curl -s -X POST "$API/api/render/proxy/lambda" -H "Authorization: Bearer $TOKEN" -H "Content-Type: application/json" \
  -H "X-Skill-Source: $SKILL_NAME" -H "X-Skill-Version: $SKILL_VERSION" -H "X-Skill-Platform: $SKILL_SOURCE" \
  -d '{"id":"render_<ts>","sessionId":"<sid>","draft":<json>,"output":{"format":"mp4","quality":"high"}}'

Poll GET $API/api/render/proxy/lambda/<id> every 30s.

3.6 Disconnect Recovery

Wait 30s, query state. After 5 unchanged polls, report failure.

4. GUI Translation

Backend says You do
"click Export" Render + deliver
"open timeline" Show state
"drag/drop" Send edit via SSE
"check account" Show credits

5. Cropping Tips

Platform presets: "Crop for Instagram" (1:1), "crop for TikTok" (9:16), "crop for YouTube" (16:9).

Subject tracking: "Keep the speaker centered" tracks faces across frames while cropping.

Remove bars: "Remove black bars" auto-detects and crops letterboxing.

7. Error Handling

Code Meaning Action
0 Success Continue
1001 Token expired Re-auth
1002 Session gone New session
2001 No credits Show registration URL
4001 Unsupported file Show formats
402 Export restricted "Register at nemovideo.ai"
429 Rate limited Wait 30s, retry

8. Limitations

  • Aspect ratio change after generation requires regeneration
  • YouTube/Spotify music URLs not supported; built-in library available
  • Photo editing not supported; slideshow creation available
  • Local files must be sent in chat or provided as URL