from aiohttp import web
from aiortc.mediastreams import MediaStreamTrack
from aiortc import RTCPeerConnection, RTCSessionDescription
from aiortc.contrib.media import MediaPlayer
from pydub import AudioSegment
import av
from aiohttp import web
from aiortc.mediastreams import MediaStreamTrack
from aiortc import RTCPeerConnection, RTCSessionDescription
from aiortc.contrib.media import MediaPlayer
from pydub import AudioSegment
import av
import pyaudio
import asyncio
import json
import os
from multiprocessing import Process, freeze_support, Queue
import sys
import threading
from time import sleep
import fractions
import time
class RadioServer(Process):
def __init__(self,q):
super().__init__()
self.q = q
self.ROOT = os.path.dirname(__file__)
self.pcs = []
self.channels = []
self.stream_offers = []
def run(self):
self.app = web.Application()
self.app.on_shutdown.append(self.on_shutdown)
self.app.router.add_get("/", self.index)
self.app.router.add_get("/telephone_calls.js", self.javascript)
self.app.router.add_get("/jquery-3.5.1.min.js", self.jquery)
self.app.router.add_post("/offer", self.offer)
threading.Thread(target=self.fill_the_queues).start()
web.run_app(self.app, access_log=None, host="192.168.1.20", port="8080", ssl_context=None)
def fill_the_queues(self):
while(True):
frame = self.q.get()
for stream_offer in self.stream_offers:
stream_offer.q.put(frame)
async def index(self,request):
content = open(os.path.join(self.ROOT, "index.html"), encoding="utf8").read()
return web.Response(content_type="text/html", text=content)
async def javascript(self,request):
content = open(os.path.join(self.ROOT, "telephone_calls.js"), encoding="utf8").read()
return web.Response(content_type="application/javascript", text=content)
async def jquery(self,request):
content = open(os.path.join(self.ROOT, "jquery-3.5.1.min.js"), encoding="utf8").read()
return web.Response(content_type="application/javascript", text=content)
async def offer(self,request):
params = await request.json()
offer = RTCSessionDescription(sdp=params["sdp"], type=params["type"])
pc = RTCPeerConnection()
self.pcs.append(pc)
# prepare epalxeis media
self.stream_offers.append(CustomRadioStream())
pc.addTrack(self.stream_offers[-1])
#player = MediaPlayer(os.path.join(self.ROOT, "ΑΓΙΑ ΚΥΡΙΑΚΗ.mp3"))
#pc.addTrack(player.audio)
@pc.on("datachannel")
def on_datachannel(channel):
self.channels.append(channel)
self.send_channel_message(str(len(self.pcs)))
@pc.on("iceconnectionstatechange")
async def on_iceconnectionstatechange():
if pc.iceConnectionState == "failed":
self.pcs.remove(pc)
print("Current peer connections:"+str(len(self.pcs)))
# handle offer
await pc.setRemoteDescription(offer)
# send answer
answer = await pc.createAnswer()
await pc.setLocalDescription(answer)
return web.Response(content_type="application/json",text=json.dumps({"sdp": pc.localDescription.sdp, "type": pc.localDescription.type}))
async def on_shutdown(self,app):
# close peer connections
if self.pcs:
coros = [pc.close() for pc in self.pcs]
await asyncio.gather(*coros)
self.pcs = []
self.channels = []
self.stream_offers = []
def send_channel_message(self,message):
for channel in self.channels:
channel.send(message)
class CustomRadioStream(MediaStreamTrack):
kind = "audio"
def __init__(self):
super().__init__() # don't forget this!
self.q = Queue()
self._start = None
async def recv(self):
frame = self.q.get()
frame_time = frame.time
if self._start is None:
self._start = time.time() - frame_time
else:
wait = self._start + frame_time - time.time()
await asyncio.sleep(wait)
return frame
class RadioOutputStream:
def __init__(self,q):
self.sample_rate = 44800
self.AUDIO_PTIME = 0.744
self.samples = int(self.AUDIO_PTIME * self.sample_rate)
self.packet_time = 20
self.FORMAT = pyaudio.paInt16
self.CHANNELS = 2
self.RATE = self.sample_rate
self.CHUNK = int(44100*0.744)
self.files_directory = os.path.abspath(r"C:\Users\Χρήστος\Music\Αναστάσιμα τροπάρια ή άλλα τροπάρια Δεσποτικών, Θεομητορικών ή άλλων εορτών Αγίων")
self.files_paths = os.listdir(self.files_directory)
self.files_info = []
for song_file in self.files_paths:
if ".mp3" in song_file.lower():
file_segment = AudioSegment.from_file(os.path.join(self.files_directory, song_file)).set_frame_rate(self.sample_rate)
duration_milliseconds = len(file_segment)
self.files_info.append({"file_segment":file_segment,"duration_milliseconds":duration_milliseconds})
self.total_files = len(self.files_info)
self.current_file = 0
self.chunk_number = 0
self.silence = AudioSegment.silent(duration=self.packet_time)
self.q = q
self.codec = av.CodecContext.create('pcm_s16le', 'r')
self.codec.sample_rate = 44800
self.codec.channels = 2
self.audio_samples = 0
def run_stream(self):
while(True):
if((self.chunk_number+1)*(self.packet_time)<=self.files_info[self.current_file]["duration_milliseconds"]):
final_slice = self.files_info[self.current_file]["file_segment"][self.chunk_number*self.packet_time:(self.chunk_number+1)*self.packet_time]
#final_slice = final_slice + 100
self.chunk_number += 1
packet = av.Packet(final_slice.raw_data)
frame = self.codec.decode(packet)[0]
frame.pts = self.audio_samples
frame.time_base = fractions.Fraction(1, self.codec.sample_rate)
self.audio_samples += frame.samples
self.q.put(frame)
else:
if(self.chunk_number*self.packet_time<self.files_info[self.current_file]["duration_milliseconds"]):
final_slice = self.files_info[self.current_file]["file_segment"][self.chunk_number*self.packet_time:]
final_slice = final_slice + self.silence
#final_slice = final_slice + 100
self.chunk_number += 1
packet = av.Packet(final_slice.raw_data)
frame = self.codec.decode(packet)[0]
frame.pts = self.audio_samples
frame.time_base = fractions.Fraction(1, self.codec.sample_rate)
self.audio_samples += frame.samples
self.q.put(frame)
else:
#start song from begin
self.chunk_number=0
if self.current_file==self.total_files-1:
self.current_file = 0
else:
self.current_file += 1
sleep(0.01)
if __name__ == "__main__":
freeze_support()
q = Queue()
radio_stream = RadioOutputStream(q)
threading.Thread(target=radio_stream.run_stream).start()
custom_server_child_process = RadioServer(q)
custom_server_child_process.start()
print("Thread and process started sucessfully.")
错误:
Traceback (most recent call last):
File "C:\Python\lib\multiprocessing\queues.py", line 245, in _feed
obj = _ForkingPickler.dumps(obj)
File "C:\Python\lib\multiprocessing\reduction.py", line 51, in dumps
cls(buf, protocol).dump(obj)
File "stringsource", line 2, in av.audio.frame.AudioFrame.__reduce_cython__
TypeError: no default __reduce__ due to non-trivial __cinit__
上述错误重复了很多次。
我做错了什么？
最佳答案
只是一次疯狂的尝试，因为我从未使用过 PyAV，也没有安装它，但遵循 my comments ，以及 PyAV documentation ，AudioFrame 类具有 from_ndarray 和 to_ndarray 方法。
因此，当您可以做的不是直接通过队列发送 AudioFrame 实例时，您可以发送:
frame_data = (frame.to_ndarray(), frame.format, frame.layout)
(假设 AudioFormat 和 AudioLayout 类可以被腌制；如果不能，则必须进行进一步的解构)。
然后通过队列发送这些:
self.q.put(frame_data)
当在队列的另一端(例如在 CustomRadioStream.recv() 中)您需要重建 AudioFrame 对象时:
frame_data = self.q.get()
frame = AudioFrame.from_ndarray(frame_data[0], format=frame_data[1], layout=frame_data[2])
您还可以使用namedtuple用于 frame_data 或包装类，使调试更容易。
关于Python进程类型错误: no default __reduce__ due to non-trivial __cinit__，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/69032946/