Audio To Wav Via Ffmpeg

Convert audio to 1 channel wav for DeepSpeech

It is remarkable that recording sound is the hard part of DeepSpeech.

With deepspeech installed in a virtualenv, do the following.

Recording audio

macos: get a m4a format audio with quicktime

Use ffmpeg

1. Get ffmpeg: brew install ffmpeg or apt install ffmpeg
2. Convert to single channel 192kbps: $ ffmpeg -i ~/Desktop/test_audio.m4a -ac 1 -ab 192k ~/Desktop/test.wav
3. Run the demo: deepspeech models/output_graph.pb ~/Desktop/test.wav models/alphabet.txt