Sources and licenses for /remove-background-noise-from-video/ samples and walkthrough
Prepared October 19, 2026. Each excerpt below was cut from the source video (the picture re-encoded as H.264, the
audio as AAC 320 kb/s), uploaded as an MP4 to the Diffio web app and restored with Diffio 4.5 Pro on October 19, 2026.
"Restored speech" and "Background noise" were exported from the app as WAV.
The page files are: a silent H.264 copy of the excerpt's picture (at most 960 px wide), a WebP poster frame, and the
original soundtrack, restored speech and background as mono MP3 at 96 kb/s. One fixed gain per soundtrack matches the
loudness of the original and the restored speech within each sample (about -20 LUFS); the background uses the
restored speech's gain so the Background amount mix matches the app. No compression, limiting, EQ or other processing.
Details: manifest.json. Sources 1 and 3 are works of U.S. federal agencies and in the public domain; source 2 is
licensed CC BY 3.0. None of the people or organizations below are Diffio customers or endorse Diffio.

1. Wind (outdoor-wind-*, and the walkthrough)
   "How do rodenticides impact wildlife?", video by Ashley Spratt, U.S. Fish and Wildlife Service, Pacific Southwest
   Region. Recorded March 6, 2018, outside the Ventura Fish and Wildlife Office, California, with wind on the camera
   mic.
   https://commons.wikimedia.org/wiki/File:How_do_rodenticides_impact_wildlife-_(40619214472).webm
   License: public domain (work of the U.S. Fish and Wildlife Service). The USFWS does not endorse Diffio.
   Excerpt: 0.6 to 18.6 s of the 1080p Commons file. Changes: excerpted, speech restored with Diffio, level matched.

2. Traffic (downtown-traffic-*, and the walkthrough)
   "KC Streetcar Platforms", video by Kansas City, Mo. City Communications (YouTube O_79Sjbrpog). Recorded April 2015
   on Main Street, Kansas City, Missouri, during streetcar construction. The speaker is the city's deputy streetcar
   project manager; in the excerpt the picture shows the street work he describes.
   https://commons.wikimedia.org/wiki/File:KC_Streetcar_Platforms.webm
   License: Creative Commons Attribution 3.0 (CC BY 3.0), https://creativecommons.org/licenses/by/3.0/
   The City of Kansas City does not endorse Diffio.
   Excerpt: 53.6 to 69.8 s of the Commons file (1280x720). Changes: excerpted, speech restored with Diffio, level
   matched.

3. Machines (hatchery-machines-*)
   "Filtration Video at Leadville NFH", video by Stephanie Raine, U.S. Fish and Wildlife Service, Mountain-Prairie
   Region. Recorded July 1, 2010, Leadville National Fish Hatchery, Colorado.
   https://commons.wikimedia.org/wiki/File:Filtration_Video_at_Leadville_NFH_(4857132923).webm
   License: public domain (work of the U.S. Fish and Wildlife Service). The USFWS does not endorse Diffio.
   Excerpt: 15.6 to 30.6 s of the Commons file (640x480). Changes: excerpted, speech restored with Diffio, level matched.

4. App screenshots (app-*.webp, walkthrough video)
   Diffio's own app, captured October 19, 2026 from a local test account ("UI Preview") on the current app build.

Walkthrough video (walkthrough.mp4, walkthrough-poster.webp, walkthrough.vtt, walkthrough-transcript.txt)
   Built with HyperFrames from the app screenshots above, the restored MP4 downloaded from the app, and the pictures
   and soundtracks of sources 1 and 2, cut as listed in walkthrough-transcript.txt. Source 2 appears under CC BY 3.0
   with the changes listed above.