[FFmpeg-user] Extracting audio of specific language

[Rudi C]

I like to extract the English audio stream of a video file using ffmpeg.
Also, if the file doesn’t have an English audio stream, I want to extract
all audio streams. Preferably with a language suffix in their names, if
their languages is known, and a specific exit code to know the detection of
an English audio failed.
(I want to do this in a script, so I don’t want any interactive solutions.)