直播语音实时转字幕：
基于Whisper的实时直播语音转录或翻译是一项使用OpenAI的Whisper模型实现的技术，它能够实时将直播中的语音内容转录成文本，甚至翻译成另一种语言。这一过程大致分为三个步骤：捕获直播音频流、语音识别（转录）以及翻译（如果需要）。下面详细解释其原理和意义。
原理
-
捕获直播音频流： 首先，需要从直播源捕获音频流。这通常通过软件工具实现，如
ffmpeg或streamlink，它们可以接入直播平台（如Twitch、YouTube等）的直播流，并提取音频数据。 -
语音识别（转录）： 捕获到的音频流被送入Whisper模型进行语音识别。Whisper是OpenAI开发的一款强大的语音识别模型，它能够准确地将语音转换成文本。该模型训练于多种语言的大量数据集上，因此具有高度的准确性和多语言识别能力。
-
翻译（可选）： 如果需要将转录的文本翻译成另一种语言，可以进一步使用机器翻译模型（如OpenAI的GPT、Google Translate等）对转录文本进行翻译。
意义
-
提高可及性： 通过实时转录直播语音，听障人士和不懂直播原语言的观众也能够理解内容，大大提高了直播内容的可及性。
-
内容归档与搜索： 转录生成的文本可以作为直播内容的归档，便于未来搜索和回顾。相比视频数据，文本更容易被搜索引擎索引，从而提高内容的发现性。
-
多语言翻译： 实时翻译可以让不同语言的观众理解和享受直播内容，促进跨语言、跨文化的交流。
-
学习和教育： 对于教育直播，实时转录和翻译能够帮助学生更好地理解教学内容，尤其是对于非母语学习者。
-
内容审核： 转录文本还可以用于自动内容审核，帮助直播平台监控和管理不适宜的内容。
一、部署
下载stream-translator
GitHub - fortypercnt/stream-translator
实战whisper语音识别第一天，部署服务器，可远程访问，实时语音转文字（全部代码和详细部署步骤）-CSDN博客
如果在之前的文章，实战whisper语音识别第一天，部署服务器，配置过环境，可跳过下面安装。
git clone https://github.com/fortypercnt/stream-translator.git
pip install -r requirements.txt 模型下载：
large-v3模型：https://huggingface.co/Systran/faster-whisper-large-v3/tree/main
large-v2模型：https://huggingface.co/guillaumekln/faster-whisper-large-v2/tree/main
large-v2模型：https://huggingface.co/guillaumekln/faster-whisper-large-v1/tree/main
medium模型：https://huggingface.co/guillaumekln/faster-whisper-medium/tree/main
small模型：https://huggingface.co/guillaumekln/faster-whisper-small/tree/main
base模型：https://huggingface.co/guillaumekln/faster-whisper-base/tree/main
tiny模型：https://huggingface.co/guillaumekln/faster-whisper-tiny/tree/main经测试large-v3模型需要10G显存以上。显存不够的可以用小模型。
使用方法：
python translator.py 直播链接这个translator.py是进行实时翻译，不想翻译可运行下面代码
二、代码
translator1.py：
import argparse
import sys
import signal
from datetime import datetime
import ffmpeg
import numpy as np
import whisper
from whisper.audio import SAMPLE_RATE
class RingBuffer:
def __init__(self, size):
self.size = size
self.data = []
self.full = False
self.cur = 0
def append(self, x):
if self.size <= 0:
return
if self.full:
self.data[self.cur] = x
self.cur = (self.cur + 1) % self.size
else:
self.data.append(x)
if len(self.data) == self.size:
self.full = True
def get_all(self):
all_data = []
for i in range(len(self.data)):
idx = (i + self.cur) % self.size
all_data.append(self.data[idx])
return all_data
def clear(self):
self.data = []
self.full = False
self.cur = 0
def open_stream(stream, direct_url, preferred_quality):
if direct_url:
try:
process = (
ffmpeg.input(stream, loglevel="panic")
.output("pipe:", format="s16le", acodec="pcm_s16le", ac=1, ar=SAMPLE_RATE)
.run_async(pipe_stdout=True)
)
except ffmpeg.Error as e:
raise RuntimeError(f"Failed to load audio: {e.stderr.decode()}") from e
return process, None
import streamlink
import subprocess
import threading
stream_options = streamlink.streams(stream)
if not stream_options:
print("No playable streams found on this URL:", stream)
sys.exit(0)
option = None
for quality in [preferred_quality, 'audio_only', 'audio_mp4a', 'audio_opus', 'best']:
if quality in stream_options:
option = quality
break
if option is None:
# Fallback
option = next(iter(stream_options.values()))
def writer(streamlink_proc, ffmpeg_proc):
while (not streamlink_proc.poll()) and (not ffmpeg_proc.poll()):
try:
chunk = streamlink_proc.stdout.read(1024)
ffmpeg_proc.stdin.write(chunk)
except (BrokenPipeError, OSError):
pass
cmd = ['streamlink', stream, option, "-O"]
streamlink_process = subprocess.Popen(cmd, stdout=subprocess.PIPE)
try:
ffmpeg_process = (
ffmpeg.input("pipe:", loglevel="panic")
.output("pipe:", format="s16le", acodec="pcm_s16le", ac=1, ar=SAMPLE_RATE)
.run_async(pipe_stdin=True, pipe_stdout=True)
)
except ffmpeg.Error as e:
raise RuntimeError(f"Failed to load audio: {e.stderr.decode()}") from e
thread = threading.Thread(target=writer, args=(streamlink_process, ffmpeg_process))
thread.start()
return ffmpeg_process, streamlink_process
def main(url, model="large-v3", interval=5, preferred_quality="audio_only", direct_url=False, **decode_options):
print("Loading model...")
model = whisper.load_model(model)
print("Opening stream...")
ffmpeg_process, _ = open_stream(url, direct_url, preferred_quality)
def handler(signum, frame):
ffmpeg_process.kill()
sys.exit(0)
signal.signal(signal.SIGINT, handler)
n_bytes = interval * SAMPLE_RATE * 2 # Factor 2 comes from reading the int16 stream as bytes
audio_buffer = RingBuffer(1) # No need for a history buffer since we're just doing real-time transcription
try:
while True:
in_bytes = ffmpeg_process.stdout.read(n_bytes)
if not in_bytes:
break
audio = np.frombuffer(in_bytes, np.int16).flatten().astype(np.float32) / 32768.0
audio_buffer.append(audio)
result = model.transcribe(np.concatenate(audio_buffer.get_all()), **decode_options)
print(f'{datetime.now().strftime("%H:%M:%S")} {result["text"]}')
audio_buffer.clear() # Clear the buffer after each transcription
finally:
ffmpeg_process.kill()
def cli():
parser = argparse.ArgumentParser(description="Real-time audio transcription from streams.")
parser.add_argument('URL', type=str, help='Stream website and channel name, e.g. twitch.tv/forsen')
parser.add_argument('--model', type=str, default='large-v3', help='Whisper model for transcription.')
parser.add_argument('--interval', type=int, default=5, help='Interval between transcription in seconds.')
parser.add_argument('--preferred_quality', type=str, default='audio_only', help='Preferred stream quality.')
parser.add_argument('--direct_url', action='store_true', help='Pass the URL directly to ffmpeg.')
args = parser.parse_args().__dict__
url = args.pop("URL")
main(url, **args)
if __name__ == '__main__':
cli()
python translator1.py https://www.huya.com/kpl虎牙kpl的直播，文字转录：
还有繁体字，修改代码，繁体转简体：
pip install opencc-python-reimplemented
translator2.py：
import argparse
import sys
import signal
from datetime import datetime
import ffmpeg
import numpy as np
import whisper
from whisper.audio import SAMPLE_RATE
import opencc
class RingBuffer:
def __init__(self, size):
self.size = size
self.data = []
self.full = False
self.cur = 0
def append(self, x):
if self.size <= 0:
return
if self.full:
self.data[self.cur] = x
self.cur = (self.cur + 1) % self.size
else:
self.data.append(x)
if len(self.data) == self.size:
self.full = True
def get_all(self):
all_data = []
for i in range(len(self.data)):
idx = (i + self.cur) % self.size
all_data.append(self.data[idx])
return all_data
def clear(self):
self.data = []
self.full = False
self.cur = 0
def open_stream(stream, direct_url, preferred_quality):
if direct_url:
try:
process = (
ffmpeg.input(stream, loglevel="panic")
.output("pipe:", format="s16le", acodec="pcm_s16le", ac=1, ar=SAMPLE_RATE)
.run_async(pipe_stdout=True)
)
except ffmpeg.Error as e:
raise RuntimeError(f"Failed to load audio: {e.stderr.decode()}") from e
return process, None
import streamlink
import subprocess
import threading
stream_options = streamlink.streams(stream)
if not stream_options:
print("No playable streams found on this URL:", stream)
sys.exit(0)
option = None
for quality in [preferred_quality, 'audio_only', 'audio_mp4a', 'audio_opus', 'best']:
if quality in stream_options:
option = quality
break
if option is None:
# Fallback
option = next(iter(stream_options.values()))
def writer(streamlink_proc, ffmpeg_proc):
while (not streamlink_proc.poll()) and (not ffmpeg_proc.poll()):
try:
chunk = streamlink_proc.stdout.read(1024)
ffmpeg_proc.stdin.write(chunk)
except (BrokenPipeError, OSError):
pass
cmd = ['streamlink', stream, option, "-O"]
streamlink_process = subprocess.Popen(cmd, stdout=subprocess.PIPE)
try:
ffmpeg_process = (
ffmpeg.input("pipe:", loglevel="panic")
.output("pipe:", format="s16le", acodec="pcm_s16le", ac=1, ar=SAMPLE_RATE)
.run_async(pipe_stdin=True, pipe_stdout=True)
)
except ffmpeg.Error as e:
raise RuntimeError(f"Failed to load audio: {e.stderr.decode()}") from e
thread = threading.Thread(target=writer, args=(streamlink_process, ffmpeg_process))
thread.start()
return ffmpeg_process, streamlink_process
def main(url, model="large-v3", interval=5, preferred_quality="audio_only", direct_url=False, **decode_options):
print("Loading model...")
model = whisper.load_model(model)
print("Opening stream...")
ffmpeg_process, _ = open_stream(url, direct_url, preferred_quality)
converter = opencc.OpenCC('t2s') # 创建繁体转简体的转换器
def handler(signum, frame):
ffmpeg_process.kill()
sys.exit(0)
signal.signal(signal.SIGINT, handler)
n_bytes = interval * SAMPLE_RATE * 2 # Factor 2 comes from reading the int16 stream as bytes
audio_buffer = RingBuffer(1)
try:
while True:
in_bytes = ffmpeg_process.stdout.read(n_bytes)
if not in_bytes:
break
audio = np.frombuffer(in_bytes, np.int16).flatten().astype(np.float32) / 32768.0
audio_buffer.append(audio)
result = model.transcribe(np.concatenate(audio_buffer.get_all()), **decode_options)
result_text = converter.convert(result["text"]) # 将繁体转换为简体
print(f'{datetime.now().strftime("%H:%M:%S")} {result_text}')
audio_buffer.clear()
finally:
ffmpeg_process.kill()
def cli():
parser = argparse.ArgumentParser(description="Real-time audio transcription from streams.")
parser.add_argument('URL', type=str, help='Stream website and channel name, e.g. twitch.tv/forsen')
parser.add_argument('--model', type=str, default='large-v3', help='Whisper model for transcription.')
parser.add_argument('--interval', type=int, default=5, help='Interval between transcription in seconds.')
parser.add_argument('--preferred_quality', type=str, default='audio_only', help='Preferred stream quality.')
parser.add_argument('--direct_url', action='store_true', help='Pass the URL directly to ffmpeg.')
args = parser.parse_args().__dict__
url = args.pop("URL")
main(url, **args)
if __name__ == '__main__':
cli()
python translator2.py https://www.huya.com/kpl
