| Conversion Type | Recommended Tool / Library | |------------------|----------------------------| | Video ↔ Audio / Video ↔ Image | **FFmpeg** | | Image ↔ Image (png, jpg, webp, etc.) | **ImageMagick** or **libvips** | | PDF ↔ Images | **Poppler-utils** / **ImageMagick** | | Office docs (Word, Excel, PowerPoint) → txt/pdf/md | **LibreOffice (headless mode)** or **unoconv** | | OneNote → Markdown / HTML | **onenote-exporter** or **Microsoft Graph API** | | Text format conversions (txt, md, html, rtf, etc.) | **Pandoc** (very powerful, supports hundreds of formats) | | Audio-only (cut, normalize, format) | **FFmpeg** or **SoX** |
