I recorded some voice clips for my presentation with Microsoft’s Voice Recorder app, but when i tried to insert the audio files into my presentation, PowerPoint claims it only supports WAV format, (despite Microsoft’s own website claiming it also supports m4a).
Which is an issue because i need to upload the .PPTX file into my university platform that supports 20MB per file max. (The presentation weights 60MB with the WAV-converted files).
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Is it already in mono? Could you reduce the sample rate?
I could only get as low as 25MB.
Oh well, time to re-record i guess.
ffmpeg -i input.m4a output.wav
