How do I install ffmpeg on iOS for youtube-dl?

[chaocharleswang]

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Make sure you are using the latest version: run youtube-dl --version and ensure your version is 2018.12.03. If it's not, read this FAQ entry and update. Issues with outdated version will be rejected.

• I've verified and I assure that I'm running youtube-dl 2018.12.03

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Description of your issue, suggested solution and other information

I integrated youtube-dl into my iOS project with "Python-iOS-support". However, how can I install ffmpeg and use youtube-dl to call it?

My trial:
I built ffmpeg with "FFmpeg-iOS-build-script" and put it into my iOS project.
Then I found "--ffmpeg-location" in youtube-dl. However, I don't know how to use it in my iOS project.

[dstftw]

Nothing special. ffmpeg must be in $PATH.