Steps to reproduce:
1. Ingest a mediapackage with a completely empty (silent) flac audio file
2. Include a sox analyze step in the workflow
workflow operation fails with uncaught exception:
Caused by: org.opencastproject.sox.api.SoxException:
java.lang.NumberFormatException: For input string: "-inf"
Operation should detect this and handle gracefully.
Workaround (if any):
Don't process videos with empty audio if using sox analyze / normalize operations.