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swyxio / swyxdotio

This is the repo for swyx's blog - Blog content is created in github issues, then posted on swyx.io as blog pages! Comment/watch to follow along my blog within GitHub
https://swyx.io
MIT License
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Using Whisper to Transcribe Podcasts #482

Closed swyxio closed 1 year ago

swyxio commented 1 year ago

slug: whisper-for-podcasts category: note

Prerequisites

these are onetime setup things

brew install ffmpeg # takes a while!
git clone https://github.com/ggerganov/whisper.cpp
cd whisper.cpp
make
cd models
./download-ggml-model.sh base.en or ./download-ggml-model.sh medium.en # see full model list here https://github.com/ggerganov/whisper.cpp/tree/master/models

Steps

  1. convert your audio file to a 16khz .wav file: ffmpeg -i SOURCE_FILE.wav -ar 16000 output.wav
  2. THEN you can do ./main -m models/ggml-medium.en.bin -f output.wav >> output.txt inside of the whisper.cpp directory, which pipes the transcription into output.txt
    • at a rate of about 3 minutes of input: 2 minutes to transcribe (for the medium - 769M param model)
    • or at a rate of about 12 minutes of input: 1 minute to transcribe (for the base - 74M param model)