>> How can I tell (from a script) if some *.m4a file is using the AAC codec >> or the ALAC codec? > One possibility is to use ffmpeg -i filename and then parse the > output. (Grepping for the strings used in each codec should give > the answer.)
Indeed, that did the trick: the stderr either include "Audio: alac" or
"Audio: aac".
Thank you,
Stefan
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