文本语音 rtsp适时播放叫号系统的底层逻辑
发布Linux, unix socket 和window win32做为音频源的 python10下的(ffmpeg version 7.1) 可运行版本.
这两天在弄这个，前2篇是通过虚拟声卡，达到了最简单的一个逻辑，播放文本就从声卡发声，不播无所谓，自动忙音。 那个工作在windows平台，
而今天的这个相似功能的代码是mac os，理论支持windows，和linux，依赖ffmpeg和xiu（一个rust流服务器）的rtsp服务。
今天的难点有点多
- asyncio的任务 async def _tts_worker(self, text: str) 运行中有各种错误， engine runAndWait是不行的。 内部有它的event loop。所以init和endLoop，是暂时找到的解决办法。同时经历了，这个，和调用 ffmpeg 外部指令，并直接获取- 代表的stdout。 会遇到各种问题。做了捕获和处理。但是查找的时候，不是太容易。
- self._start_ffmpeg() 他需要， create socket 或pipe完成以后，才能运行。 调试我都手工在外部启动。 作用就是，输出到rtsp服务器，以备播放。
- input handle，等都是ai生成的，因为有好多种循环，这是比较省心在。
- 最紧急隐蔽在是， async def _heartbeat(self) 他需要计算播放静音的时间，长了不行，短了不行。 这个最初在测试代码，就几个函数。然后AI，生成了三个theading的版本，两个Queue。 然后转到了异步版本，明显快了很多。
- 在windows上使用win32pipen可以达到unix socket的效果很相似， 记得还有FIFO是linux专用的，当然还有stdin，和stdout。对于ffmpeg，这是一些程序内部的传送机制
- rtsp是需要一个后台的服务的，xiu是开源的rust项目，可以使。另外window推荐metamtx，双击运行，什么也不管。
音画同步应该是另个问题了，几天前，鼓捣了一下图片。让编辑后的，马上 在视频中显示。 这个另外一个话题了。做的这些就为了，让报号和点单，有个界面。
bash
ffmpeg -re -framerate 30 -f image2 -loop 1 -i "image1.jpg" -c:v libx264 -preset ultrafast -tune zerolatency -pix_fmt rgba -f rtsp -rtsp_transport tcp rtsp://localhost:8554/live合并的代码，就当成剩下的作业，有空再来做。
对于刚接触的，最好是慢慢和AI调试着来，一些功能就做出来。
启动 接收text FIFOunix.. 同步语音传输 语音 推送 文本转语音 rtsp流服务器
语音推送使用ffmpeg独立进程，实现了前后中断后自动重启。
程序主体
可独立运行，也可以结合ffmg管理推送进程
- macos ,理论Linux适用,单文件可执行
main.py
bash
import asyncio
import struct
import pyttsx3
import tempfile
import os
import socket
from aioconsole import ainput
from contextlib import suppress
from typing import Optional
class AsyncTTSController:
def __init__(self):
# 使用Unix域套接字
self.socket_path = "/tmp/tts_audio.sock"
self.server_socket: Optional[socket.socket] = None
self.client_socket: Optional[socket.socket] = None
# 进程控制
self.ffmpeg_process: Optional[asyncio.subprocess.Process] = None
self.running = False
# TTS引擎
self.engine = pyttsx3.init()
self.engine.setProperty('rate', 180)
self.engine.setProperty('volume', 1.0)
# 音频参数
self.sample_rate = 24000
self.channels = 1
self.bits_per_sample = 16
self.silence = self._generate_silence(0.2)
self.wav_header = self._generate_wav_header()
# 状态管理
self.connection_active = False
self.last_heartbeat = 0.0
self.heartbeat_interval = 2.0
self.sending_audio = 0
def _generate_wav_header(self) -> bytes:
"""生成WAV文件头"""
byte_rate = self.sample_rate * self.channels * self.bits_per_sample // 8
block_align = self.channels * self.bits_per_sample // 8
return struct.pack(
'<4sI4s4sIHHIIHH4sI',
b'RIFF', 36, b'WAVE', b'fmt ', 16, 1, self.channels,
self.sample_rate, byte_rate, block_align, self.bits_per_sample,
b'data', 0
)
def _generate_silence(self, duration: float) -> bytes:
"""生成静音数据"""
samples = int(self.sample_rate * duration)
return bytes(samples * self.channels * (self.bits_per_sample // 8))
async def _async_create_socket(self) -> None:
"""创建Unix域套接字"""
with suppress(Exception):
if os.path.exists(self.socket_path):
os.unlink(self.socket_path)
self.server_socket = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
self.server_socket.setblocking(False)
self.server_socket.bind(self.socket_path)
self.server_socket.listen(1)
loop = asyncio.get_running_loop()
while self.running and not self.connection_active:
try:
self.client_socket, _ = await loop.sock_accept(self.server_socket)
self.connection_active = True
print("客户端已连接")
await loop.sock_sendall(self.client_socket, self.wav_header)
except (BlockingIOError, InterruptedError):
await asyncio.sleep(0.1)
except Exception as e:
print(f"连接错误: {str(e)}")
self.connection_active = False
await asyncio.sleep(1)
async def _start_ffmpeg(self) -> None:
"""启动FFmpeg进程"""
with suppress(Exception):
if self.ffmpeg_process:
self.ffmpeg_process.terminate()
await self.ffmpeg_process.wait()
socketid='unix:'+self.socket_path
self.ffmpeg_process = await asyncio.create_subprocess_exec(
'ffmpeg',
'-f', 's16le',
'-ar', str(self.sample_rate),
'-ac', str(self.channels),
'-i', socketid, # 修改输入源为套接字路径
'-c:a', 'aac',
'-f', 'rtsp',
'-rtsp_transport', 'tcp',
'rtsp://localhost:8554/mystream',
stdout=asyncio.subprocess.DEVNULL,
stdin=asyncio.subprocess.DEVNULL,
stderr=asyncio.subprocess.PIPE
)
asyncio.create_task(self._monitor_ffmpeg_errors())
async def _monitor_ffmpeg_errors(self) -> None:
"""监控FFmpeg错误输出"""
while self.running and self.ffmpeg_process:
line = await self.ffmpeg_process.stderr.readline()
if not line:
break
# print(f"[FFmpeg Error] {line.decode().strip()}")
async def _async_write_socket(self, data: bytes) -> None:
"""安全写入套接字"""
try:
if self.client_socket and self.connection_active:
loop = asyncio.get_running_loop()
await loop.sock_sendall(self.client_socket, data)
except (BrokenPipeError, ConnectionResetError):
print("连接已断开，尝试重连...")
await self._reconnect_pipeline()
except Exception as e:
print(f"写入错误: {str(e)}")
self.connection_active = False
async def _reconnect_pipeline(self) -> None:
"""完整重连流程"""
print("启动重连流程...")
self.connection_active = False
if self.client_socket:
self.client_socket.close()
task1=asyncio.create_task(self._async_create_socket()),
task2=asyncio.create_task( self._start_ffmpeg()),
await task2
await task1
# await asyncio.gather(task1, task2)
#await self._async_create_socket()
#await self._start_ffmpeg()
# 剩余的heartbeat、tts_worker、input_handler等方法保持相同...
async def stop(self) -> None:
"""安全关闭"""
self.running = False
with suppress(Exception):
if self.ffmpeg_process:
self.ffmpeg_process.terminate()
await self.ffmpeg_process.wait()
if self.client_socket:
self.client_socket.close()
if self.server_socket:
self.server_socket.close()
if os.path.exists(self.socket_path):
os.unlink(self.socket_path)
print("所有资源已释放")
async def _heartbeat(self) -> None:
"""心跳维持机制"""
while self.running:
if self.connection_active :
for i in range(10):
if self.sending_audio<0:
await self._async_write_socket(self.silence)
else :
self.sending_audio-= 2
await asyncio.sleep(0.2)
# print(self.sending_audio,"slend")
# await asyncio.sleep(self.heartbeat_interval)
else:
await asyncio.sleep(0.5)
def _sync_tts(self,text,tmp_filename):
eng=pyttsx3.init()
# eng.say(text)
eng.save_to_file(text, 'temp3.wav')
eng.runAndWait()
eng.endLoop()
async def _tts_worker(self, text: str) -> None:
"""异步TTS处理核心"""
tmp_filename = None
#with open('audio1.raw','rb') as chunkf:
# data=chunkf.read()
# secdd=len(data)/48000
# self.sending_audio=int(secdd*10)
# await self._async_write_socket(data)
# #await asyncio.sleep(secdd)
# print (secdd,len(data) )
# 创建临时文件
with tempfile.NamedTemporaryFile(delete=False) as tmp:
tmp_filename = tmp.name
# # 同步TTS操作转异步执行
loop = asyncio.get_running_loop()
await loop.run_in_executor(None, self._sync_tts, *(text, 'temp3.wav',))
# 转换音频格式
# await asyncio.sleep(1.3)
# self._sync_tts(text,tmp_filename)
try:
proc = await asyncio.create_subprocess_exec(
'ffmpeg',
'-hide_banner',
'-loglevel', 'error',
'-y',
'-i', 'temp3.wav', # 输入文件路径
'-f', 's16le', # 强制输出格式为PCM s16le
'-acodec', 'pcm_s16le', # 明确指定音频编解码器 👈 关键修复
'-ar', str(self.sample_rate),
'-ac', str(self.channels),
'-', # 输出到标准输出
stdout=asyncio.subprocess.PIPE
)
# 流式发送音频数据
sum=0
while chunk := await proc.stdout.read(4096):
sum+=len(chunk)
await self._async_write_socket(chunk)
self.sending_audio=int(sum*10/48000)
print("write data x0.1s:",self.sending_audio)
finally:
if tmp_filename and os.path.exists(tmp_filename):
1
# os.unlink(tmp_filename)
async def _input_handler(self) -> None:
"""异步输入处理"""
while self.running:
try:
text = await ainput("请输入文本（输入q退出）: ")
if text.lower() == 'q':
self.running = False
break
if text.strip():
await self._tts_worker(text)
except Exception as e:
print(f"输入错误: {str(e)}")
async def run(self) -> None:
"""主运行循环"""
self.running = True
#
#await self._start_ffmpeg()
tasks = [
asyncio.create_task(self._async_create_socket()),
asyncio.create_task( self._start_ffmpeg()),
asyncio.create_task(self._input_handler()),
asyncio.create_task(self._heartbeat()),
]
await asyncio.gather(*tasks)
# 以下保持不变...
if __name__ == "__main__":
controller = AsyncTTSController()
try:
asyncio.run(controller.run())
except KeyboardInterrupt:
asyncio.run(controller.stop())
"""
ffmpeg -y -i temp.wav -f s16le -acodec pcm_s16le -ar 24000 -ac 1 audio.raw
ffmpeg -ar 24000 -ac 1 -f s16le -i unix:/tmp/tts_audio.sock -f rtsp rtsp://localhost:8554/mystream
"""- window10系统python10 可运行版本
主要让deepseek,执行了,socket 到 win32pipen的替换.因为本来就是换过去的.这一块的代码完全没有手工介入. 唯一改的是注释eng.endLoop(),并不用每次init() ,应改是pyttsx3的一个跨平台特性. ,异步的win32下支持稳定.
bash
def _sync_tts(self, text, tmp_filename):
eng = self.engine #pyttsx3.init()
eng.save_to_file(text, 'temp3.wav')
eng.runAndWait()
# eng.endLoop()
bash
import asyncio
import struct
import pyttsx3
import tempfile
import os
from aioconsole import ainput
from contextlib import suppress
from typing import Optional
import win32pipe
import win32file
import pywintypes
class AsyncTTSController:
def __init__(self):
# 使用Windows命名管道
self.pipe_name = r'\\.\pipe\tts_audio_pipe'
self.pipe_handle = None
# 进程控制
self.ffmpeg_process: Optional[asyncio.subprocess.Process] = None
self.running = False
# TTS引擎
self.engine = pyttsx3.init()
self.engine.setProperty('rate', 180)
self.engine.setProperty('volume', 1.0)
# 音频参数
self.sample_rate = 24000
self.channels = 1
self.bits_per_sample = 16
self.silence = self._generate_silence(0.2)
self.wav_header = self._generate_wav_header()
# 状态管理
self.connection_active = False
self.last_heartbeat = 0.0
self.heartbeat_interval = 2.0
self.sending_audio = 0
def _generate_wav_header(self) -> bytes:
"""生成WAV文件头"""
byte_rate = self.sample_rate * self.channels * self.bits_per_sample // 8
block_align = self.channels * self.bits_per_sample // 8
return struct.pack(
'<4sI4s4sIHHIIHH4sI',
b'RIFF', 36, b'WAVE', b'fmt ', 16, 1, self.channels,
self.sample_rate, byte_rate, block_align, self.bits_per_sample,
b'data', 0
)
def _generate_silence(self, duration: float) -> bytes:
"""生成静音数据"""
samples = int(self.sample_rate * duration)
return bytes(samples * self.channels * (self.bits_per_sample // 8))
async def _async_create_pipe(self) -> None:
"""创建命名管道"""
while self.running and not self.connection_active:
try:
# 创建命名管道
self.pipe_handle = win32pipe.CreateNamedPipe(
self.pipe_name,
win32pipe.PIPE_ACCESS_DUPLEX,
win32pipe.PIPE_TYPE_BYTE | win32pipe.PIPE_READMODE_BYTE | win32pipe.PIPE_WAIT,
1, # 最大实例数
65536, 65536, # 输入输出缓冲区大小
0, # 默认超时
None # 安全属性
)
# 异步等待连接
loop = asyncio.get_running_loop()
await loop.run_in_executor(None, win32pipe.ConnectNamedPipe, self.pipe_handle, None)
self.connection_active = True
print("客户端已连接")
await self._async_write_socket(self.wav_header)
except pywintypes.error as e:
if e.winerror == 536: # ERROR_PIPE_CONNECTED
self.connection_active = True
print("客户端已连接")
elif e.winerror == 232: # 客户端断开
print("客户端断开连接")
self.connection_active = False
if self.pipe_handle:
win32file.CloseHandle(self.pipe_handle)
self.pipe_handle = None
await asyncio.sleep(1)
else:
print(f"管道错误: {e}")
await asyncio.sleep(1)
except Exception as e:
print(f"其他错误: {e}")
await asyncio.sleep(1)
async def _start_ffmpeg(self) -> None:
"""启动FFmpeg进程"""
with suppress(Exception):
if self.ffmpeg_process:
self.ffmpeg_process.terminate()
await self.ffmpeg_process.wait()
self.ffmpeg_process = await asyncio.create_subprocess_exec(
'ffmpeg',
'-f', 's16le',
'-ar', str(self.sample_rate),
'-ac', str(self.channels),
'-i', self.pipe_name,
'-c:a', 'aac',
'-f', 'rtsp',
'-rtsp_transport', 'tcp',
'rtsp://localhost:8554/mystream',
stdout=asyncio.subprocess.DEVNULL,
stdin=asyncio.subprocess.DEVNULL,
stderr=asyncio.subprocess.PIPE
)
asyncio.create_task(self._monitor_ffmpeg_errors())
async def _monitor_ffmpeg_errors(self) -> None:
"""监控FFmpeg错误输出"""
while self.running and self.ffmpeg_process:
line = await self.ffmpeg_process.stderr.readline()
if not line:
break
# print(f"[FFmpeg Error] {line.decode().strip()}")
async def _async_write_socket(self, data: bytes) -> None:
"""安全写入管道"""
try:
if self.connection_active and self.pipe_handle:
loop = asyncio.get_running_loop()
await loop.run_in_executor(None, win32file.WriteFile, self.pipe_handle, data)
except pywintypes.error as e:
print(f"写入错误: {e}")
self.connection_active = False
await self._reconnect_pipeline()
except Exception as e:
print(f"其他写入错误: {e}")
self.connection_active = False
async def _reconnect_pipeline(self) -> None:
"""完整重连流程"""
print("启动重连流程...")
self.connection_active = False
if self.pipe_handle:
win32file.CloseHandle(self.pipe_handle)
self.pipe_handle = None
await asyncio.gather(
self._async_create_pipe(),
self._start_ffmpeg()
)
async def _heartbeat(self) -> None:
"""心跳维持机制"""
while self.running:
if self.connection_active:
for i in range(10):
if self.sending_audio < 0:
await self._async_write_socket(self.silence)
else:
self.sending_audio -= 2
await asyncio.sleep(0.2)
else:
await asyncio.sleep(0.5)
def _sync_tts(self, text, tmp_filename):
eng = pyttsx3.init()
eng.save_to_file(text, 'temp3.wav')
eng.runAndWait()
# eng.endLoop()
async def _tts_worker(self, text: str) -> None:
"""异步TTS处理核心"""
await asyncio.get_event_loop().run_in_executor(None, self._sync_tts, text, 'temp3.wav')
try:
proc = await asyncio.create_subprocess_exec(
'ffmpeg',
'-hide_banner',
'-loglevel', 'error',
'-y',
'-i', 'temp3.wav',
'-f', 's16le',
'-acodec', 'pcm_s16le',
'-ar', str(self.sample_rate),
'-ac', str(self.channels),
'-',
stdout=asyncio.subprocess.PIPE
)
sum_bytes = 0
while chunk := await proc.stdout.read(4096):
sum_bytes += len(chunk)
await self._async_write_socket(chunk)
self.sending_audio = int(sum_bytes * 10 / 48000)
print(f"写入数据 x0.1s: {self.sending_audio}")
finally:
if os.path.exists('temp3.wav'):
os.remove('temp3.wav')
async def _input_handler(self) -> None:
"""异步输入处理"""
while self.running:
try:
text = await ainput("请输入文本（输入q退出）: ")
if text.lower() == 'q':
self.running = False
break
if text.strip():
await self._tts_worker(text)
except Exception as e:
print(f"输入错误: {str(e)}")
async def run(self) -> None:
"""主运行循环"""
self.running = True
tasks = [
asyncio.create_task(self._async_create_pipe()),
asyncio.create_task(self._start_ffmpeg()),
asyncio.create_task(self._input_handler()),
asyncio.create_task(self._heartbeat()),
]
await asyncio.gather(*tasks)
async def stop(self) -> None:
"""安全关闭"""
self.running = False
with suppress(Exception):
if self.ffmpeg_process:
self.ffmpeg_process.terminate()
await self.ffmpeg_process.wait()
if self.pipe_handle:
win32pipe.DisconnectNamedPipe(self.pipe_handle)
win32file.CloseHandle(self.pipe_handle)
print("所有资源已释放")
if __name__ == "__main__":
controller = AsyncTTSController()
try:
asyncio.run(controller.run())
except KeyboardInterrupt:
asyncio.run(controller.stop())独立的ffmpeg启动和监控的独立代码
验证了一下rtsp断线重建连结，也验证了 上面 的main.py的socket server退出后，ffmpeg自动重启连接。 要使用这个更稳健球的程序，需要
注释main.py run中的asyncio.create_task( self._start_ffmpeg()),
代码不用修改,把管道名这个快, 彻底修改为,ffmpeg认识的window样式,就可运行.
r'\.\pipe\tts_audio_pipe'
ffmg,py
bash
import asyncio
from contextlib import suppress
import logging
logging.basicConfig(level=logging.INFO, format='%(asctime)s - %(levelname)s - %(message)s')
class FFmpegManager:
def __init__(self):
self.ffmpeg_process = None
self._retry_count = 0
self._max_retries = 5
self._retry_lock = asyncio.Lock()
self._is_running = False
self.sample_rate=24000
self.channels=1
self.socket_path = "/tmp/tts_audio.sock"
async def _start_ffmpeg(self) -> None:
"""带自动重试的FFmpeg启动函数"""
async with self._retry_lock:
await self._safe_terminate()
try:
socketid = 'unix:' + self.socket_path
self.ffmpeg_process =await asyncio.create_subprocess_exec(
'ffmpeg',
'-f', 's16le',
'-ar', str(self.sample_rate),
'-ac', str(self.channels),
'-i', socketid, # 修改输入源为套接字路径
'-c:a', 'aac',
'-f', 'rtsp',
'-rtsp_transport', 'tcp',
'rtsp://localhost:8554/mystream',
stdout=asyncio.subprocess.DEVNULL,
stdin=asyncio.subprocess.DEVNULL,
stderr=asyncio.subprocess.PIPE
)
self._retry_count = 0 # 重置重试计数器
asyncio.create_task(self._monitor_ffmpeg_errors())
self._is_running = True
except Exception as e:
logging.error(f"FFmpeg启动失败: {str(e)}")
await self._handle_retry()
async def _monitor_ffmpeg_errors(self):
"""增强型进程监控"""
while self._is_running:
logging.info("loop error cathch")
stderr = await self.ffmpeg_process.stderr.readline()
if stderr:
logging.error(f"FFmpeg错误输出: {stderr.decode().strip()}")
# 检测进程状态
return_code = self.ffmpeg_process.returncode
if return_code is not None:
logging.warning(f"FFmpeg异常退出，返回码: {return_code}")
self._is_running = False
await self._handle_retry()
break
async def _handle_retry(self):
"""智能重试策略"""
if self._retry_count >= self._max_retries:
logging.critical("达到最大重试次数，放弃重启")
return
# 指数退避算法
delay = min(2 ** self._retry_count, 30) # 最大间隔30秒
self._retry_count += 1
logging.info(f"将在 {delay} 秒后尝试第 {self._retry_count} 次重启")
await asyncio.sleep(delay)
await self._start_ffmpeg()
async def _safe_terminate(self):
"""安全终止现有进程"""
if self.ffmpeg_process:
with suppress(Exception):
self.ffmpeg_process.terminate()
await self.ffmpeg_process.wait()
self.ffmpeg_process = None
# 以下保持不变...
async def main():
controller=FFmpegManager()
try:
await controller._start_ffmpeg()
logging.info('rung')
await asyncio.sleep(1160)
except KeyboardInterrupt:
logging.info(3)
asyncio.run(controller._safe_terminate())
if __name__ == "__main__":
asyncio.run(main())