Offline speech recognition vosk

from vosk import Model, KaldiRecognizer
import sys

if not sys.argv[1]:
    print ("Missing wav parameter")
    sys.exit()

model = Model("model")

rec = KaldiRecognizer(model, 16000)

with open(sys.argv[1], "rb") as f:
    for buf in f:
        if buf:
            rec.AcceptWaveform(buf)
        else:
            result = json.dumps(rec.FinalResult())
            print(result)
            break