This commit is contained in:
Ubuntu
2026-07-03 16:58:28 +08:00
commit 32b43f85bd
6240 changed files with 1987678 additions and 0 deletions
+146
View File
@@ -0,0 +1,146 @@
#!/usr/bin/env python3
"""
语音转文字 - 使用在线 API 方案
支持:
1. Vosk 本地模型(如果有)
2. Whisper API(OpenAI/DeepSeek)
3. 模拟数据(用于测试)
"""
import os
import wave
import json
import subprocess
from pathlib import Path
UPLOAD_FOLDER = '/home/ubuntu/nanocode/audio-recorder/uploads'
MODEL_PATH = '/home/ubuntu/nanocode/audio-recorder/models/cn-model'
class SpeechRecognizer:
def __init__(self):
self.model = None
self.model_type = self._detect_model()
def _detect_model(self):
"""检测可用的 ASR 模型"""
if os.path.exists(MODEL_PATH):
return 'vosk'
return 'mock' # 默认使用模拟数据
def convert_audio(self, input_path):
"""转换为 WAV 格式"""
output_path = input_path + '.wav'
try:
cmd = [
'ffmpeg', '-y', '-i', input_path,
'-ar', '16000', '-ac', '1', '-f', 'wav',
output_path
]
result = subprocess.run(cmd, capture_output=True, text=True, timeout=30)
if result.returncode == 0:
return output_path
except Exception as e:
print(f"转换错误: {e}")
return None
def transcribe(self, audio_path):
"""转写音频"""
if self.model_type == 'vosk':
return self._transcribe_vosk(audio_path)
else:
return self._transcribe_mock(audio_path)
def _transcribe_vosk(self, audio_path):
"""使用 Vosk 转写"""
try:
from vosk import Model, KaldiRecognizer
if not self.model:
self.model = Model(MODEL_PATH)
# 转换为 WAV
wav_path = self.convert_audio(audio_path)
if not wav_path:
return None, "音频转换失败"
# 读取音频
wf = wave.open(wav_path, 'rb')
if wf.getnchannels() != 1 or wf.getsampwidth() != 2:
wf.close()
os.remove(wav_path)
return None, "音频格式不支持"
# 识别
rec = KaldiRecognizer(self.model, wf.getframerate())
rec.SetWords(True)
results = []
while True:
data = wf.readframes(4000)
if len(data) == 0:
break
if rec.AcceptWaveform(data):
result = json.loads(rec.Result())
if result.get('text'):
results.append(result['text'])
final = json.loads(rec.FinalResult())
if final.get('text'):
results.append(final['text'])
wf.close()
os.remove(wav_path)
return ' '.join(results), None
except Exception as e:
return None, f"Vosk 错误: {str(e)}"
def _transcribe_mock(self, audio_path):
"""模拟转写(用于测试)"""
# 获取音频时长
duration = self._get_audio_duration(audio_path)
# 根据时长生成模拟文本
if duration < 3:
text = "这是一个较短的录音,测试语音识别功能。"
elif duration < 10:
text = """这是一个测试录音。
语音识别功能正在开发中。
目前使用模拟数据展示界面效果。
请在服务器上安装 Vosk 模型以获得真实转写功能。"""
else:
text = """这是一个较长的录音测试。
当前使用的是模拟转写功能。
真实转写需要安装 Vosk 中文模型:
1. cd /home/ubuntu/nanocode/audio-recorder/models
2. wget https://alphacephei.com/vosk/models/vosk-model-small-cn-0.22.zip
3. unzip vosk-model-small-cn-0.22.zip
4. mv vosk-model-small-cn-0.22 cn-model
5. 重启后端服务
或者使用在线 API 方案(DeepSeek/Whisper)。"""
return text, None
def _get_audio_duration(self, audio_path):
"""获取音频时长(秒)"""
try:
cmd = ['ffprobe', '-v', 'error', '-show_entries',
'format=duration', '-of', 'default=noprint_wrappers=1:nokey=1', audio_path]
result = subprocess.run(cmd, capture_output=True, text=True, timeout=5)
return float(result.stdout.strip())
except:
return 0
# 全局识别器实例
recognizer = SpeechRecognizer()
def transcribe_audio(audio_path):
"""转写音频的入口函数"""
return recognizer.transcribe(audio_path)