{
 "page": "/remove-background-noise-from-video/",
 "preparedOn": "2026-10-19",
 "samples": [
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   "slug": "outdoor-wind",
   "label": "Wind on the camera mic at an outdoor interview",
   "source": {
    "sourcePageUrl": "https://commons.wikimedia.org/wiki/File:How_do_rodenticides_impact_wildlife-_(40619214472).webm",
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    "license": "Public domain (work of the U.S. Fish and Wildlife Service)",
    "credit": "Video by Ashley Spratt, USFWS Pacific Southwest Region. Recorded March 6, 2018",
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   },
   "transcriptCheck": {
    "method": "faster-whisper large-v3 on the original soundtrack and on the restored speech, word sequences compared within the published length",
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    "note": "Only stretches where the words match are published; the page quotes the restored words."
   },
   "qualityCheck": {
    "method": "ScoreQ no-reference MOS (diffio-mac bench, 10 s end-anchored windows, both tracks loudness-normalized to -23 LUFS) on the full uploaded excerpt and the restored speech; higher is better",
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  {
   "slug": "downtown-traffic",
   "label": "Downtown street traffic behind an interview at a streetcar construction site",
   "source": {
    "sourcePageUrl": "https://commons.wikimedia.org/wiki/File:KC_Streetcar_Platforms.webm",
    "sourceFileUrl": "https://upload.wikimedia.org/wikipedia/commons/4/4c/KC_Streetcar_Platforms.webm",
    "license": "CC BY 3.0 (https://creativecommons.org/licenses/by/3.0/)",
    "credit": "\"KC Streetcar Platforms\" by Kansas City, Mo. City Communications, CC BY 3.0 (YouTube O_79Sjbrpog, via Wikimedia Commons). Recorded April 2015 on Main Street, Kansas City, Missouri",
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    "method": "faster-whisper large-v3 on the original soundtrack and on the restored speech, word sequences compared within the published length",
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    "note": "Only stretches where the words match are published; the page quotes the restored words."
   },
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  {
   "slug": "hatchery-machines",
   "label": "Water and filter machinery in a hatchery building",
   "source": {
    "sourcePageUrl": "https://commons.wikimedia.org/wiki/File:Filtration_Video_at_Leadville_NFH_(4857132923).webm",
    "sourceFileUrl": "https://upload.wikimedia.org/wikipedia/commons/b/b5/Filtration_Video_at_Leadville_NFH_%284857132923%29.webm",
    "license": "Public domain (work of the U.S. Fish and Wildlife Service)",
    "credit": "Video by Stephanie Raine, USFWS Mountain-Prairie Region. Recorded July 1, 2010, Leadville National Fish Hatchery, Colorado",
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    "excerptEndSeconds": 30.6,
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    "app": "Diffio web app (local stack on the dev Mac mini fleet)",
    "model": "Diffio 4.5 Pro",
    "projectName": "Hatchery filtration walkthrough",
    "createdAtUtc": "2026-10-19T20:22:25Z",
    "secondsFromCreateToResult": 17
   },
   "playback": {
    "durationSeconds": 15.0,
    "soundtracks": "MP3 mono 44.1 kHz 96 kb/s",
    "picture": "H.264 main, at most 960 px wide, CRF 27, no audio",
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     "speech": 888768,
     "background": 888768
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    "processing": "Fixed gain only. No compression, limiting or EQ.",
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     "speech": 180916,
     "background": 180916,
     "picture": 653673,
     "poster": 21766
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   },
   "transcriptCheck": {
    "method": "faster-whisper large-v3 on the original soundtrack and on the restored speech, word sequences compared within the published length",
    "wordMatchRatio": 0.975,
    "note": "Only stretches where the words match are published; the page quotes the restored words."
   },
   "qualityCheck": {
    "method": "ScoreQ no-reference MOS (diffio-mac bench, 10 s end-anchored windows, both tracks loudness-normalized to -23 LUFS) on the full uploaded excerpt and the restored speech; higher is better",
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    "improvement": 3.258
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  }
 ],
 "walkthrough": {
  "files": [
   "walkthrough.mp4",
   "walkthrough-poster.webp",
   "walkthrough.vtt",
   "walkthrough-transcript.txt"
  ],
  "builtWith": "HyperFrames 0.8.176, 1920x1080 master, published as H.264 1280x720 (a VP9 WebM came out larger, so it was not published)",
  "durationSeconds": 43.3,
  "sources": [
   "downtown-traffic",
   "outdoor-wind",
   "app screenshots captured October 19, 2026 from the local stack"
  ],
  "downloadedVideoCheck": "The MP4 downloaded from the app has a video stream bit-identical to the uploaded excerpt (ffmpeg -c copy -f md5) and an audio track of the same length."
 },
 "notUsed": [
  {
   "slug": "festival-crowd",
   "source": "https://commons.wikimedia.org/wiki/File:Curren_School_Principal_Kelly_Castillo_talks_to_Ashley_Spratt_with_the_U_S_Fish_and_Wildlife_Service_about_her_school%27s_first_ever_Dia_de_los_Muertos_Monarch_Butterfly_Festival_(30541132221).webm",
   "reason": "Restored with Diffio 4.5 Pro twice (two excerpts); the speaker was quiet under the crowd and the restored speech changed words, so it was left out."
  },
  {
   "slug": "bus-park-traffic",
   "source": "https://commons.wikimedia.org/wiki/File:Meet_Nigeria%27s_Bus_Conductor_with_One_Leg.webm",
   "reason": "Restored with Diffio 4.5 Pro; the restored speech changed a nickname and scored lower on ScoreQ (4.36) than the published samples, so it was left out."
  },
  {
   "slug": "cleanup-traffic",
   "source": "https://commons.wikimedia.org/wiki/File:260210-YKS-PACUP-STREET_CLEANING-HULEN_(996369).webm",
   "reason": "Restored with Diffio 4.5 Pro; little traffic under the voice, a dropped word and a lower ScoreQ (4.28), so it was left out."
  },
  {
   "slug": "robotics-arena-crowd",
   "source": "https://commons.wikimedia.org/wiki/File:FIRST_Robotics_Competition_(139020).webm",
   "reason": "Restored with Diffio 4.5 Pro; the words matched, but the restored speech scored lower on ScoreQ (4.25) than the published samples and the speaker is probably a minor, so it was left out."
  },
  {
   "slug": "fair-robotics-referee",
   "source": "https://commons.wikimedia.org/wiki/File:20220828-OC-CDP-0002-4-H_Robotics_Challenge_Maryland_State_Fair_2022.webm",
   "reason": "Restored with Diffio 4.5 Pro; the restored speech changed words in an unclear phrase, so it was left out."
  }
 ]
}