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ffmpeg-auto-assemble

ffmpeg 自动拼接成片:一条命令把 storyboard.json(商品图/视频片段 + 口播稿)渲染成带配音、字幕花字、转场、BGM 自动闪避、响度标准化的 9:16 MP4,纯本地运行。Use when the user wants to assemble/edit/render a product…

Skill by xianyu110

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ffmpeg 自动拼接成片:一条命令把 storyboard.json(商品图/视频片段 + 口播稿)渲染成带配音、字幕花字、转场、BGM 自动闪避、响度标准化的 9:16 MP4,纯本地运行。Use when the user wants to assemble/edit/render a product video, 自动剪辑, 一键成片, 拼接视频, 图片转视频, Ken Burns, add BGM/subtitles/voice-over with ffmpeg, or batch-produce short videos without an editor.

Use cases: writing

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What this skill can do and what it asks for, from its SKILL.md and code. Checked Oct 25, 2026.

Tools
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Runs as
Python package

Network hosts it talks to 1

  • codeload.github.com · found in install command

Files it touches

  • ~/.claude/skills/ffmpeg-auto-assemble
  • /usr/share/fonts/opentype/noto/NotoSansCJK-Bold.ttc

What's inside

Skill name
ffmpeg-auto-assemble
Description
ffmpeg 自动拼接成片:一条命令把 storyboard.json(商品图/视频片段 + 口播稿)渲染成带配音、字幕花字、转场、BGM 自动闪避、响度标准化的 9:16 MP4,纯本地运行。Use when the user wants to assemble/edit/render a product video, 自动剪辑, 一键成片, 拼接视频, 图片转视频, Ken Burns, add BGM/subtitles/voice-over with ffmpeg, or batch-produce short videos without an editor.
License
MIT
Instructions
74 lines in SKILL.md · view on GitHub

Before installing

  • Ships executable scripts

Files (6)

  • SKILL.md
  • assemble.py · scripts/
  • make_bgm.py · scripts/
  • make_cards.py · scripts/
  • make_subs.py · scripts/
  • tts_edge.py · scripts/

SKILL.md (first lines)

# ffmpeg 自动拼接成片 · Auto-assemble with ffmpeg

`storyboard.json` → 配音(edge-tts)→ 每镜 Ken Burns / 视频裁切 → xfade 转场 → ASS 字幕花字 → BGM 闪避混音 → 两遍 loudnorm(-14 LUFS)→ `out/video.mp4` + `.srt`。

> Part of [ecommerce-video-skills](https://github.com/xianyu110/ecommerce-video-skills) · 脚本都在本目录 `scripts/`:`assemble.py`(主程序)· `tts_edge.py` · `make_subs.py` · `make_bgm.py`(免版权合成 BGM)· `make_cards.py`(PIL 商品卡/结尾卡)

## 输入 Inputs

- `storyboard.json`(可由 `selling-point-storyboard` 生成),素材路径相对于该文件
- 环境:Python 3.9+,`pip install pillow numpy edge-tts`,ffmpeg(含 libass),CJK 字体

## 快速开始 Quick start

```bash
pip install pillow numpy edge-tts
python scripts/assemble.py examples/aura-bottle/storyboard.json -o out/aura.mp4       # 仓库自带示例,约 30 秒渲染完
python scripts/assemble.py storyboard.json --tts none -o out/preview.mp4             # 离线预览(无配音,按字数估时)
python scripts/assemble.py storyboard.json --size 1080x1080 -o out/main-1x1.mp4      # 主图视频 1:1
python scripts/assemble.py storyboard.json --bgm music.mp3                           # 用你有版权的音乐
```

## storyboard 字段 Fields

| 字段 | 说明 |
|---|---|
| 顶层 `voice` / `rate` / `pitch` | edge-tts 音色、语速(如 `+10%`)、音调 |
| 顶层 `bgm` | `"auto"`(内置合成,免版权)/ 音乐文件路径 / `null` |
| 顶层 `tag` | 全程左上角贴纸(品牌/型号/「演示」) |
| `image` 或 `video` (+`start`) | 素材;视频从 `start` 秒截取本镜时长 |
| `line` | 配音文本;镜头时长 = 配音 + 0.15s 前导 + `pad` |
| `sub` | 字幕(默认同 `line`);`""` 表示本镜不出字幕;`**高亮**`、`|` 分段 |
| `title` / `cta` | 花字 / 行动号召按钮 |
| `motion` | `zoom_in` `zoom_out` `pan_left` `pan_right` `pan_up` `pan_down` `punch` `static` |
| `fit` | `auto`(比例接近则裁满,否则模糊填充)/ `cover` / `blur` |
| `transition` | 进入下一镜的 xfade 名:`fade` `slideleft` `slideup` `smoothleft` `circleopen` `wipeleft` … |
| `min` / `duration` / `pad` | 最短时长 / 固定时长 / 句后留白(秒) |

## 步骤 Steps

1. 检查素材都存在、比例合适(商品图 ≥ 1000px);缺结尾卡就用 `make_cards.py` 生成:
   `python scripts/make_cards.py --image main.png --name "商品名" --points "卖点一|卖点二|卖点三" -o assets/end-card.png`
2. 先 `--tts none` 跑一遍看画面节奏,再正式渲染。
3. 渲染后抽帧检查:`ffmpeg -ss 3 -i out/video.mp4 -frames:v 1 check.png`
4. 交给 `platform-spec-export` 导出各平台版本;用 `cover-title-ab` 做封面。

## 流水线细节 How it works

- **Ken Burns**:逐帧 `scale(eval=frame)+crop`,比 `zoompan` 抖动小;`punch` = 0.35 秒快速推近(钩子专用)。
- **转场**:每镜多渲染半个转场长度,xfade 居中在镜头分界,**配音起点不被转场吃掉**。
- **混音**:配音按镜头起点放置;BGM 默认 -20 dB,有人声时再压 10 dB(平滑闪避);先压缩/限幅再两遍 loudnorm 到约 -14 LUFS、TP -1.5 dB。
- **字幕**:用真实配音时长生成 `build/timing.json` → `make_subs.py` → libass 烧录,同时导出 `.srt`。

## 检查清单 Checklist

- [ ] 成片时长、分辨率、帧率正确(`ffprobe out/video.mp4`)
- [ ] 抽 3 帧:字幕不压商品、不进底部 UI 区
- [ ] 听一遍:配音清楚、BGM 不抢、开头无爆音
- [ ] BGM 有商用授权(`auto` 合成音乐可放心用)
- [ ] 素材(图片/视频/字体)有使用授权

## 常见问题与修复 Failure fixes

| 问题 | 修复 |
|---|---|
| `ffmpeg failed` | 看脚本打印的 stderr 末尾;常见是路径错误或 ffmpeg 缺 libass/libx264 |
| 画面边缘糊 | 素材分辨率太低;换 ≥1080px 图片或减小 `motion` 幅度(改 `static`) |
| 商品被裁掉 | 该镜设 `"fit": "blur"` |
| 转场处声音被切 | 不会发生(配音按镜头起点对齐);若自定义了 `duration` 过短,加长即可 |
| 渲染慢 | 预设已用 `veryfast` 中间文件;最终编码可把 `-preset medium` 改为 `fast` |
| 想要 1:1 / 16:9 | `--size 1080x1080` / `--size 1920x1080`,字幕字号自动按比例 |

参考与致谢:思路受 [MoneyPrinterTurbo](https://github.com/harry0703/MoneyPrinterTurbo)(MIT)「脚本→配音→字幕→合成」流水线启发,本实现为独立编写的纯 ffmpeg 版本,未复制其代码。

From xianyu110/ecommerce-video-skills, MIT.

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Oct 5, 2026 (23 days ago)

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MIT
First seen
Oct 24, 2026
Last checked
Oct 24, 2026

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ffmpeg-auto-assemble skill. Agent Mart. https://agentmart.dev/skills/xianyu110-ffmpeg-auto-assemble (last updated 2026-10-24)