How do you convert an entire directory with ffmpeg?

How do you convert an entire directory/folder with ffmpeg via command line or with a batch script?

Answer

For Linux and macOS this can be done in one line, using parameter expansion to change the filename extension of the output file:

for i in *.avi; do ffmpeg -i "$i" "${i%.*}.mp4"; done

Attribution
Source : Link , Question Author : Eugene , Answer Author : Matthias Braun

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