Separate Sound from Video

Extract audio from a video on iPhone or iPad
While you can play around with iMovie to detach audio from your video, this can be tougher than you think.
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After trying a handful of free apps, one that stands out is MP3 Converter -Audio Extractor. It’s available for both iPhone and iPad and is super simple to use. Open the app, allow it to access your photos, and then do the following.

• https://www.idownloadblog.com/2019/01/18/extract-audio-from-video-iphone-ipad-mac/

unless you can do this on a Mac, you need an app for that!

You can also use ffmpeg or one of the many ffmpeg GUIs.

If you only have a single clip to process, you can also just attach your video file + someone can extract the audio for you.

https://apps.apple.com/us/app/media-converter-video-to-mp3/id1294207675

I will recommend the above app.

A simple ffmpeg example might be useful.

# For a given video...
imac> avinfo 2020-11-10-nonce-debug.mp4
2020-11-10-nonce-debug.mp4
   length: 00:03:40.00, start: 0.000000, bitrate: 377 kb/s
   stream: #0:0(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, mono, fltp, 125 kb/s (default)
   stream: #0:1(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p(bt709), 1920x1080 [SAR 1:1 DAR 16:9], 250 kb/s, 1 fps, 1 tbr, 100 tbn, 50 tbc (default)

# Extract the audio, -nv=skip video, -c:a copy=copy audio stream with no transcode
ffmpeg -i 2020-11-10-nonce-debug.mp4 -vn -c:a copy 2020-11-10-nonce-debug.aac

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I will try the apps suggested when I meet with the file owner this next week.

Will any of these suggestions work on a Windows PC?