{
 "title": "網頁背景影片壓縮：ffmpeg 指令產生器",
 "site": "網頁動畫工具箱",
 "canonical": "https://motion.penguindriver.com/video",
 "markdown": "https://motion.penguindriver.com/video.md",
 "summary": "首頁大影片是網站變慢的頭號原因。選好尺寸與畫質，複製指令到終端機執行。",
 "date_modified": "2026-09-26",
 "retrieved": "2026-09-28",
 "content_sha256": "3e144e1cda92f0d7c70f70ec913d21d7ff5f829f4b48146cb5803d29d36a8b44",
 "fingerprint_basis": "Markdown 版全文，移除贊助行與開頭 front matter，去除頭尾空白",
 "verify": {
  "text_snapshot": "https://motion.penguindriver.com/cite?path=%2Fvideo&format=text",
  "how": "下載 text_snapshot 後計算 SHA-256，應與 content_sha256 相同；內容更新時指紋會改變"
 },
 "sources": [
  {
   "name": "FFmpeg 官方文件",
   "url": "https://ffmpeg.org/documentation.html"
  },
  {
   "name": "W3C WCAG 2.2",
   "url": "https://www.w3.org/TR/WCAG22/"
  }
 ],
 "source_count": 2,
 "cite_as": {
  "zh": "網頁背景影片壓縮：ffmpeg 指令產生器｜網頁動畫工具箱。https://motion.penguindriver.com/video（資料日期 2026-09-26，擷取 2026-09-28）",
  "apa": "網頁動畫工具箱. (2026). 網頁背景影片壓縮：ffmpeg 指令產生器. Retrieved 2026-09-28, from https://motion.penguindriver.com/video",
  "markdown": "[網頁背景影片壓縮：ffmpeg 指令產生器](https://motion.penguindriver.com/video)（網頁動畫工具箱，2026-09-26）"
 },
 "license": "可引用，請附上正式網址與資料日期"
}