ffmpegpipestdinone-lineropenai-whisper

How do I pipe files into whisper.cpp?

whisper.cpp only supports wav-files. I have files in other formats I want to transcribe. It would be nice if I could make the conversion and transcription in one step/using a one-liner.

I have tried these two, and some variant, but they failed:

whisper.cpp -m ~/usr/whisper.cpp/models/ggml-large.bin < ffmpeg -i sample.amr -f wav

ffmpeg -i sample.amr -f wav pipe:1  | whisper.cpp -m ~/usr/whisper.cpp/models/ggml-large.bin

From the whisper.cpp help page:

usage: whisper.cpp [options] file0.wav file1.wav ...

  -f FNAME,  --file FNAME        [       ] input WAV file path

(The help page doesn't mention stdin, pipes etc)

Solution

  • You can use -f - to read from stdin.

    For example:

    ffmpeg -nostdin -threads 0 -i $INPUT_AUDIO_FILE -f wav -ac 1 -acodec pcm_s16le -ar 16000 - | whisper.cpp -m models/ggml-tiny.en.bin -f -