pptx

name	pptx
description	PPT演示文稿处理：创建、编辑、读取.pptx文件。用户提到"PPT"、"幻灯片"、"演示"、"deck"、".pptx"时使用。
triggers	["PPT","幻灯片","演示文稿",".pptx","pptx","presentation"]
license	Proprietary

PPTX Skill

Runtime Dependencies

• Requires LibreOffice (soffice) for presentation-to-PDF conversion.
• Requires Poppler (pdftoppm) for PDF-to-image conversion used by thumbnail/visual workflows.
• If pdftoppm is unavailable, a Python fallback path may use pdf2image.
• On Windows, dependencies must be installed and available in PATH; if missing, report the dependency issue and stop (do not keep retrying).

Quick Reference

Task	Guide
Read/analyze content	python -m markitdown presentation.pptx
Edit or create from template	Read editing.md
Create from scratch	Read pptxgenjs.md

---

Reading Content

# Text extraction
python -m markitdown presentation.pptx

# Visual overview
python scripts/thumbnail.py presentation.pptx

# Raw XML
python scripts/office/unpack.py presentation.pptx unpacked/

---

Editing Workflow

Read editing.md for full details.

1. Analyze template with thumbnail.py
2. Unpack → manipulate slides → edit content → clean → pack

---

Creating from Scratch

Read pptxgenjs.md for full details.

Use when no template or reference presentation is available.

---

Design Ideas

Don't create boring slides. Plain bullets on a white background won't impress anyone. Consider ideas from this list for each slide.

Before Starting

• Pick a bold, content-informed color palette: The palette should feel designed for THIS topic. If swapping your colors into a completely different presentation would still "work," you haven't made specific enough choices.
• Dominance over equality: One color should dominate (60-70% visual weight), with 1-2 supporting tones and one sharp accent. Never give all colors equal weight.
• Dark/light contrast: Dark backgrounds for title + conclusion slides, light for content ("sandwich" structure). Or commit to dark throughout for a premium feel.
• Commit to a visual motif: Pick ONE distinctive element and repeat it — rounded image frames, icons in colored circles, thick single-side borders. Carry it across every slide.

Color Palettes

Choose colors that match your topic — don't default to generic blue. Use these palettes as inspiration:

Theme	Primary	Secondary	Accent
Midnight Executive	1E2761 (navy)	CADCFC (ice blue)	FFFFFF (white)
Forest & Moss	2C5F2D (forest)	97BC62 (moss)	F5F5F5 (cream)
Coral Energy	F96167 (coral)	F9E795 (gold)	2F3C7E (navy)
Warm Terracotta	B85042 (terracotta)	E7E8D1 (sand)	A7BEAE (sage)
Ocean Gradient	065A82 (deep blue)	1C7293 (teal)	21295C (midnight)
Charcoal Minimal	36454F (charcoal)	F2F2F2 (off-white)	212121 (black)
Teal Trust	028090 (teal)	00A896 (seafoam)	02C39A (mint)
Berry & Cream	6D2E46 (berry)	A26769 (dusty rose)	ECE2D0 (cream)
Sage Calm	84B59F (sage)	69A297 (eucalyptus)	50808E (slate)
Cherry Bold	990011 (cherry)	FCF6F5 (off-white)	2F3C7E (navy)

For Each Slide

Every slide needs a visual element — image, chart, icon, or shape. Text-only slides are forgettable.

Layout options:

• Two-column (text left, illustration on right)
• Icon + text rows (icon in colored circle, bold header, description below)
• 2x2 or 2x3 grid (image on one side, grid of content blocks on other)
• Half-bleed image (full left or right side) with content overlay

Data display:

• Large stat callouts (big numbers 60-72pt with small labels below)
• Comparison columns (before/after, pros/cons, side-by-side options)
• Timeline or process flow (numbered steps, arrows)

Visual polish:

• Icons in small colored circles next to section headers
• Italic accent text for key stats or taglines

Typography

Choose an interesting font pairing — don't default to Arial. Pick a header font with personality and pair it with a clean body font.

Header Font	Body Font
Georgia	Calibri
Arial Black	Arial
Calibri	Calibri Light
Cambria	Calibri
Trebuchet MS	Calibri
Impact	Arial
Palatino	Garamond
Consolas	Calibri

Element	Size
Slide title	36-44pt bold
Section header	20-24pt bold
Body text	14-16pt
Captions	10-12pt muted

Spacing

• 0.5" minimum margins
• 0.3-0.5" between content blocks
• Leave breathing room—don't fill every inch

Avoid (Common Mistakes)

• Don't repeat the same layout — vary columns, cards, and callouts across slides
• Don't center body text — left-align paragraphs and lists; center only titles
• Don't skimp on size contrast — titles need 36pt+ to stand out from 14-16pt body
• Don't default to blue — pick colors that reflect the specific topic
• Don't mix spacing randomly — choose 0.3" or 0.5" gaps and use consistently
• Don't style one slide and leave the rest plain — commit fully or keep it simple throughout
• Don't create text-only slides — add images, icons, charts, or visual elements; avoid plain title + bullets
• Don't forget text box padding — when aligning lines or shapes with text edges, set margin: 0 on the text box or offset the shape to account for padding
• Don't use low-contrast elements — icons AND text need strong contrast against the background; avoid light text on light backgrounds or dark text on dark backgrounds
• NEVER use accent lines under titles — these are a hallmark of AI-generated slides; use whitespace or background color instead

---

QA (Required)

Assume there are problems. Your job is to find them.

Your first render is almost never correct. Approach QA as a bug hunt, not a confirmation step. If you found zero issues on first inspection, you weren't looking hard enough.

Content QA

python -m markitdown output.pptx

Check for missing content, typos, wrong order.

When using templates, check for leftover placeholder text:

python -m markitdown output.pptx | grep -iE "xxxx|lorem|ipsum|this.*(page|slide).*layout"

If grep returns results, fix them before declaring success.

Visual QA

⚠️ USE SUBAGENTS — even for 2-3 slides. You've been staring at the code and will see what you expect, not what's there. Subagents have fresh eyes.

Convert slides to images (see Converting to Images), then use this prompt:

Visually inspect these slides. Assume there are issues — find them.

Look for:
- Overlapping elements (text through shapes, lines through words, stacked elements)
- Text overflow or cut off at edges/box boundaries
- Decorative lines positioned for single-line text but title wrapped to two lines
- Source citations or footers colliding with content above
- Elements too close (< 0.3" gaps) or cards/sections nearly touching
- Uneven gaps (large empty area in one place, cramped in another)
- Insufficient margin from slide edges (< 0.5")
- Columns or similar elements not aligned consistently
- Low-contrast text (e.g., light gray text on cream-colored background)
- Low-contrast icons (e.g., dark icons on dark backgrounds without a contrasting circle)
- Text boxes too narrow causing excessive wrapping
- Leftover placeholder content

For each slide, list issues or areas of concern, even if minor.

Read and analyze these images:
1. /path/to/slide-01.jpg (Expected: [brief description])
2. /path/to/slide-02.jpg (Expected: [brief description])

Report ALL issues found, including minor ones.

Verification Loop

1. Generate slides → Convert to images → Inspect
2. List issues found (if none found, look again more critically)
3. Fix issues
4. Re-verify affected slides — one fix often creates another problem
5. Repeat until a full pass reveals no new issues

Do not declare success until you've completed at least one fix-and-verify cycle.

---

Converting to Images

Convert presentations to individual slide images for visual inspection:

python scripts/office/soffice.py --headless --convert-to pdf output.pptx
pdftoppm -jpeg -r 150 output.pdf slide

This creates slide-01.jpg, slide-02.jpg, etc.

To re-render specific slides after fixes:

pdftoppm -jpeg -r 150 -f N -l N output.pdf slide-fixed

---

Dependencies

• pip install "markitdown[pptx]" - text extraction
• pip install Pillow - thumbnail grids
• npm install -g pptxgenjs - creating from scratch
• LibreOffice (soffice) - PDF conversion (auto-configured for sandboxed environments via scripts/office/soffice.py)
• Poppler (pdftoppm) - PDF to images

---

🎯 实用示例

示例1：基本处理流程

# 1. 提取文本内容
python -m markitdown presentation.pptx --output presentation.md

# 2. 生成缩略图预览
python scripts/thumbnail.py presentation.pptx --output thumbnails/

# 3. 转换为PDF
python scripts/office/soffice.py --headless --convert-to pdf presentation.pptx

# 4. 生成图像用于检查
pdftoppm -jpeg -r 150 presentation.pdf slide

示例2：创建新演示文稿

# 从模板创建
# 1. 分析模板结构
python scripts/thumbnail.py template.pptx

# 2. 编辑内容
# 编辑markdown文件，然后使用pptxgenjs生成

# 3. 使用pptxgenjs创建
pptxgenjs create --title "新产品发布" --slides 10 --output new_presentation.pptx

示例3：批量处理

# 批量转换所有PPT为PDF
for ppt in *.pptx; do
    python scripts/office/soffice.py --headless --convert-to pdf "$ppt"
done

# 批量提取文本
find . -name "*.pptx" -exec python -m markitdown {} --output {}.md \;

示例4：质量检查流程

#!/bin/bash
# QA检查脚本
PPT_FILE="$1"

echo "=== PPT质量检查: $PPT_FILE ==="

# 1. 检查内容
echo "1. 检查内容完整性..."
python -m markitdown "$PPT_FILE" | grep -iE "xxxx|lorem|ipsum|placeholder" && echo "发现占位符内容！"

# 2. 生成缩略图
echo "2. 生成缩略图..."
python scripts/thumbnail.py "$PPT_FILE" --output /tmp/thumbnails/

# 3. 转换为PDF
echo "3. 转换为PDF..."
python scripts/office/soffice.py --headless --convert-to pdf "$PPT_FILE"

# 4. 生成幻灯片图像
PPT_PDF="${PPT_FILE%.pptx}.pdf"
echo "4. 生成幻灯片图像..."
pdftoppm -jpeg -r 150 "$PPT_PDF" /tmp/slides/slide

echo "检查完成！请查看/tmp/slides/中的图像进行视觉检查"

示例5：自动化工作流

#!/bin/bash
# 自动化PPT处理工作流
INPUT_DIR="./raw_ppts"
OUTPUT_DIR="./processed"
REPORT_DIR="./reports"

mkdir -p "$OUTPUT_DIR" "$REPORT_DIR"

for ppt in "$INPUT_DIR"/*.pptx; do
    BASENAME=$(basename "$ppt" .pptx)
    echo "处理: $BASENAME"
    
    # 提取文本
    python -m markitdown "$ppt" --output "$OUTPUT_DIR/${BASENAME}.md"
    
    # 生成缩略图
    python scripts/thumbnail.py "$ppt" --output "$OUTPUT_DIR/thumbnails/${BASENAME}/"
    
    # 转换为PDF
    python scripts/office/soffice.py --headless --convert-to pdf "$ppt" --output "$OUTPUT_DIR/${BASENAME}.pdf"
    
    # 生成报告
    echo "=== $BASENAME ===" >> "$REPORT_DIR/summary.txt"
    python -m markitdown "$ppt" --stats >> "$REPORT_DIR/summary.txt"
    echo "" >> "$REPORT_DIR/summary.txt"
done

echo "所有文件处理完成！"

📚 学习资源

命令参考

# markitdown文本提取
python -m markitdown --help

# 缩略图生成
python scripts/thumbnail.py --help

# LibreOffice转换
python scripts/office/soffice.py --help

相关技能

• docx: Word文档处理
• xlsx: Excel表格处理
• pdf: PDF文件处理
• markdownify-mcp: 内容转换工具

最佳实践

1. 保持备份: 处理前备份原始文件
2. 分步处理: 复杂操作分步进行
3. 视觉检查: 务必生成图像进行视觉检查
4. 版本控制: 重要修改使用git管理
5. 模板复用: 创建和维护高质量的模板

故障排除

# 检查依赖
python scripts/office/soffice.py --check-deps

# 调试模式
python -m markitdown --verbose presentation.pptx

# 清理缓存
rm -rf /tmp/soffice_*

---

提示: 对于复杂的PPT编辑任务，建议使用专业的PPT编辑软件（如Microsoft PowerPoint或Google Slides）进行主要编辑，然后使用本工具进行批量处理和自动化任务。