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adbcb65
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3494134
Delete streaming.py
Browse files- streaming.py +0 -66
streaming.py
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import subprocess
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import numpy as np
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def ffmpeg_stream(youtube_url, sampling_rate=16_000, chunk_duration_ms=5000, pad_duration_ms=200):
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"""
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Helper function to read an audio file through ffmpeg.
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"""
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chunk_len = int(sampling_rate * chunk_duration_ms / 1000)
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pad_len = int(sampling_rate * pad_duration_ms / 1000)
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read_chunk_len = chunk_len + pad_len * 2
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ar = f"{sampling_rate}"
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ac = "1"
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format_for_conversion = "f32le"
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dtype = np.float32
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size_of_sample = 4
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ffmpeg_command = [
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"ffmpeg",
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"-i",
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"pipe:",
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"-ac",
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ac,
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"-ar",
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ar,
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"-f",
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format_for_conversion,
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"-hide_banner",
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"-loglevel",
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"quiet",
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"pipe:1",
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]
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ytdl_command = ["yt-dlp", "-f", "bestaudio", youtube_url, "--quiet", "-o", "-"]
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try:
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ffmpeg_process = subprocess.Popen(ffmpeg_command, stdin=subprocess.PIPE, stdout=subprocess.PIPE, bufsize=-1)
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ytdl_process = subprocess.Popen(ytdl_command, stdout=ffmpeg_process.stdin)
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except FileNotFoundError:
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raise ValueError("ffmpeg was not found but is required to stream audio files from filename")
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acc = b""
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leftover = np.zeros((0,), dtype=np.float32)
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while ytdl_process.poll() is None:
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buflen = read_chunk_len * size_of_sample
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raw = ffmpeg_process.stdout.read(buflen)
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if raw == b"":
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break
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if len(acc) + len(raw) > buflen:
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acc = raw
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else:
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acc += raw
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audio = np.frombuffer(acc, dtype=dtype)
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audio = np.concatenate([leftover, audio])
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if len(audio) < pad_len * 2:
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# TODO: handle end of stream better than this
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break
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yield audio
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leftover = audio[-pad_len * 2 :]
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read_chunk_len = chunk_len
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