BUFFER_SIZE = 512 self.buffer_size = BUFFER_SIZE feed_audio(self, chunk):

input pcm buffer_size issue about realtimestt HOT 3 OPEN

koljab commented on August 13, 2024

input pcm buffer_size issue

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Comments (3)

KoljaB commented on August 13, 2024

No, just leave it as it is. The feed_audio method takes care of the buffer size.

You just need to ensure that the input chunks are PCM raw data and 16000 Hz sample rate:

from scipy.signal import resample

def decode_and_resample(
		audio_data,
		original_sample_rate,
		target_sample_rate):

	# Decode 16-bit PCM data to numpy array
	audio_np = np.frombuffer(audio_data, dtype=np.int16)

	# Calculate the number of samples after resampling
	num_original_samples = len(audio_np)
	num_target_samples = int(num_original_samples * target_sample_rate /
							 original_sample_rate)

	# Resample the audio
	resampled_audio = resample(audio_np, num_target_samples)

	return resampled_audio.astype(np.int16).tobytes()

resampled_chunk = decode_and_resample(chunk, sample_rate, 16000)
recorder.feed_audio(resampled_chunk)

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jacobtang commented on August 13, 2024

Thanks! Can feed_audio with 16k stereo data?the raw data is 48k,stereo data,when i call decode_and_resample,the audio data is 16k stereo.
In my realtime server,I can not get recorder.text() in a loop by using thread,may be the feed data is not correct.

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KoljaB commented on August 13, 2024

Should be mono 16000 Hz, 16 Bit, PCM

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