FFMpeg is a powerful tool for Video but also for audio.
It has an interesting “complex filter” system which allows to chain a lot of transformations.
And everything can be done efficiently by ffmpeg.
In the article, I propose to first introduce complex filtering only on audio and then add the video part.
You can read some information about filtering on the ffmpeg wiki:
https://trac.ffmpeg.org/wiki/FilteringGuide
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Hi @ycollet. Articles about ffmpeg have been proposed many times before, but we’ve always been advised not to run them because ffmpeg is “legally encumbered”.
https://lists.fedoraproject.org/archives/search?mlist=magazine%40lists.fedoraproject.org&q=ffmpeg
Sorry. But thanks for trying!
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Ah, yes, I understand.
Thanks for the link 
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