Python进程类型错误：由于非平凡的cinit，没有默认值__

Question

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

Answer 1

这只是一个大胆的尝试，因为我从未使用过PyAV，也没有安装它，但是在my{a2}和PyAV documentation之后，AudioFrame类有from_ndarray和to_ndarray方法

因此，当您可以不直接通过队列发送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；否则，您必须进一步解构）

然后通过队列发送这些信息：

self.q.put(frame_data)

当在队列的另一端（例如在CustomRadioStream.recv()）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^{}for frame_data或包装类来简化调试

Answer 2

我找到了

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
import queue

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.codec = av.CodecContext.create('pcm_s16le', 'r')
        self.codec.sample_rate = 44800
        self.codec.channels = 2

        self.audio_samples = 0
    
        self.app = web.Application()
        self.app.on_shutdown.append(self.on_shutdown)
        self.app.router.add_get("/", self.index)
        self.app.router.add_get("/radio.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):
            data = self.q.get()
            packet = av.Packet(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
            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, "radio.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.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
        
    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
                self.q.put(final_slice.raw_data)
            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


                    self.q.put(final_slice.raw_data)
                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.")

我将数据包编码“传输”到进程中，并将编码器定义放入run方法中

无论如何，谢谢大家的帮助