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Get metadata of an audio or video file:

$ afinfo 'some_multimedia_file.m4a''

Get the duration in the unit of seconds:

$ afinfo 'some_multimedia_file.m4a' | awk '/estimated duration/ { print $3 }'

References

  • https://stackoverflow.com/questions/8933053/check-duration-of-audio-files-on-the-command-line
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