MP3 to WAV via ffmpeg.exe in AzureFunctions, for PowerApps and Flow

MP3 to WAV via ffmpeg.exe in AzureFunctions, for PowerApps and Flow

  • PowerApps Microphone control records MP3 files
  • Cognitive Speech to Text wants to turn WAV files into JSON
  • Even with Flow, we can’t convert the audio file formats.
  • We need an Azure Function to gluethis one step
  • After a bit of research, it looks like FFMPEG, a popular free utility can be used to do the conversion