執行效果：

完整程式碼

# !/usr/bin/python
# -*- coding:utf-8 -*-
# time: 2019/07/21--20:12
__author__ = 'Henry'


'''
專案: B站動漫番劇(bangumi)下載
版本2: 無加密API版,但是需要加入登入後cookie中的SESSDATA欄位,才可下載720p及以上視訊
API:
1.獲取cid的api為 https://api.bilibili.com/x/web-interface/view?aid=47476691 aid後面為av號
2.下載連結api為 https://api.bilibili.com/x/player/playurl?avid=44743619&cid=78328965&qn=32 cid為上面獲取到的 avid為輸入的av號 qn為視訊質量
注意:
但是此介面headers需要加上登入後'Cookie': 'SESSDATA=3c5d20cf%2C1556704080%2C7dcd8c41' (30天的有效期)(因為現在只有登入後才能看到720P以上視訊了)
不然下載之後都是最低清晰度,哪怕選擇了80也是隻有480p的解析度!!
'''

import requests,time,urllib.request,re
from moviepy.editor import *
import os,sys,threading,json

import imageio

# 訪問API地址
def get_play_list(aid,cid,quality):
  url_api = 'https://api.bilibili.com/x/player/playurl?cid={}&avid={}&qn={}'.format(cid,aid,quality)
  headers = {
    'User-Agent': 'Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML,like Gecko) Chrome/55.0.2883.87 Safari/537.36','Cookie': 'SESSDATA=13bd2abb%2C1619949439%2C2815d*b1',# 登入B站後複製一下cookie中的SESSDATA欄位,有效期1個月
    'Host': 'api.bilibili.com'
  }
  html = requests.get(url_api,headers=headers).json()
  # print(html)
  # 當下載會員視訊時,如果cookie中傳入的不是大會員的SESSDATA時就會返回: {'code': -404,'message': '啥都木有','ttl': 1,'data': None}
  if html['code'] != 0:
    print('注意!當前集數為B站大會員專享,若想下載,Cookie中請傳入大會員的SESSDATA')
    return 'NoVIP'
  video_list = []
  for i in html['data']['durl']:
    video_list.append(i['url'])
  print(video_list)
  return video_list


# 下載視訊
'''
 urllib.urlretrieve 的回撥函式：
def callbackfunc(blocknum,blocksize,totalsize):
  @blocknum: 已經下載的資料塊
  @blocksize: 資料塊的大小
  @totalsize: 遠端檔案的大小
'''


def Schedule_cmd(blocknum,totalsize):
  speed = (blocknum * blocksize) / (time.time() - start_time)
  # speed_str = " Speed: %.2f" % speed
  speed_str = " Speed: %s" % format_size(speed)
  recv_size = blocknum * blocksize

  # 設定下載進度條
  f = sys.stdout
  pervent = recv_size / totalsize
  percent_str = "%.2f%%" % (pervent * 100)
  n = round(pervent * 50)
  s = ('#' * n).ljust(50,'-')
  f.write(percent_str.ljust(8,' ') + '[' + s + ']' + speed_str)
  f.flush()
  # time.sleep(0.1)
  f.write('\r')


def Schedule(blocknum,'-')
  print(percent_str.ljust(6,' ') + '-' + speed_str)
  f.flush()
  time.sleep(2)
  # print('\r')


# 位元組bytes轉化K\M\G
def format_size(bytes):
  try:
    bytes = float(bytes)
    kb = bytes / 1024
  except:
    print("傳入的位元組格式不對")
    return "Error"
  if kb >= 1024:
    M = kb / 1024
    if M >= 1024:
      G = M / 1024
      return "%.3fG" % (G)
    else:
      return "%.3fM" % (M)
  else:
    return "%.3fK" % (kb)


# 下載視訊
def down_video(video_list,title,start_url,page):
  num = 1
  print('[正在下載第{}話視訊,請稍等...]:'.format(page) + title)
  currentVideoPath = os.path.join(sys.path[0],'bilibili_video',title) # 當前目錄作為下載目錄
  for i in video_list:
    opener = urllib.request.build_opener()
    # 請求頭
    opener.addheaders = [
      # ('Host','upos-hz-mirrorks3.acgvideo.com'),#注意修改host,不用也行
      ('User-Agent','Mozilla/5.0 (Macintosh; Intel Mac OS X 10.13; rv:56.0) Gecko/20100101 Firefox/56.0'),('Accept','*/*'),('Accept-Language','en-US,en;q=0.5'),('Accept-Encoding','gzip,deflate,br'),('Range','bytes=0-'),# Range 的值要為 bytes=0- 才能下載完整視訊
      ('Referer',start_url),# 注意修改referer,必須要加的!
      ('Origin','https://www.bilibili.com'),('Connection','keep-alive'),]
    urllib.request.install_opener(opener)
    # 建立資料夾存放下載的視訊
    if not os.path.exists(currentVideoPath):
      os.makedirs(currentVideoPath)
    # 開始下載
    if len(video_list) > 1:
      urllib.request.urlretrieve(url=i,filename=os.path.join(currentVideoPath,r'{}-{}.flv'.format(title,num)),reporthook=Schedule_cmd) # 寫成mp4也行 title + '-' + num + '.flv'
    else:
      urllib.request.urlretrieve(url=i,r'{}.flv'.format(title)),reporthook=Schedule_cmd) # 寫成mp4也行 title + '-' + num + '.flv'
    num += 1


# 合併視訊(20190802新版)
def combine_video(title_list):
  video_path = os.path.join(sys.path[0],'bilibili_video') # 下載目錄
  for title in title_list:
    current_video_path = os.path.join(video_path,title)
    if len(os.listdir(current_video_path)) >= 2:
      # 視訊大於一段才要合併
      print('[下載完成,正在合併視訊...]:' + title)
      # 定義一個數組
      L = []
      # 遍歷所有檔案
      for file in sorted(os.listdir(current_video_path),key=lambda x: int(x[x.rindex("-") + 1:x.rindex(".")])):
        # 如果字尾名為 .mp4/.flv
        if os.path.splitext(file)[1] == '.flv':
          # 拼接成完整路徑
          filePath = os.path.join(current_video_path,file)
          # 載入視訊
          video = VideoFileClip(filePath)
          # 新增到陣列
          L.append(video)
      # 拼接視訊
      final_clip = concatenate_videoclips(L)
      # 生成目標視訊檔案
      final_clip.to_videofile(os.path.join(current_video_path,r'{}.mp4'.format(title)),fps=24,remove_temp=False)
      print('[視訊合併完成]' + title)
    else:
      # 視訊只有一段則直接列印下載完成
      print('[視訊合併完成]:' + title)


if __name__ == '__main__':
  start_time = time.time()
  # 使用者輸入番劇完整連結地址
  # 1. https://www.bilibili.com/bangumi/play/ep267692 (用帶ep連結)
  # 2. https://www.bilibili.com/bangumi/play/ss26878 (不要用這個ss連結,epinfo的aid會變成'-1')
  print('*' * 30 + 'B站番劇視訊下載小助手' + '*' * 30)
  print('[提示]: 1.如果您想下載720P60,1080p+,1080p60質量的視訊,請將35行程式碼中的SESSDATA改成你登入大會員後得到的SESSDATA,普通使用者的SESSDATA最多隻能下載1080p的視訊')
  print('    2.若發現下載的視訊質量在720p以下,請將35行程式碼中的SESSDATA改成你登入後得到的SESSDATA(有效期一個月),而失效的SESSDATA就只能下載480p的視訊')

  start = input('請輸入您要下載的B站番劇的完整連結地址(例如:https://www.bilibili.com/bangumi/play/ep267692):')
  ep_url = start
  headers = {
    'User-Agent': 'Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML,like Gecko) Chrome/55.0.2883.87 Safari/537.36'
  }
  html = requests.get(ep_url,headers=headers).text
  ep_info = re.search(r'INITIAL_STATE__=(.*?"]});',html).group(1)
  # print(ep_info)
  ep_info = json.loads(ep_info)
  print(ep_info)
  # print('您將要下載的番劇名為:' + ep_info['mediaInfo']['title']) # 欄位格式太不統一了
  y = input('請輸入1或2 - 1.只下載當前一集 2.下載此番劇的全集:')
  # 1.如果只下載當前ep
  id_list = []
  if y == '1':
    try:
      id_list.append([ep_info['videoData']['aid'],ep_info['videoData']['cid'],ep_info['videoData']['title'] + ' ' + ep_info['videoData']['title']])
    except:
      id_list.append([ep_info['videoData']['aid'],'第' + str(ep_info['videoData']['index']) + '話 ' + ep_info['videoData']['index_title']])
  # 2.下載此番劇全部ep
  else:
    for i in ep_info['epList']:
      # if i['badge'] == '': # 當badge欄位為'會員'時,介面返回404
      try:
        id_list.append([i['aid'],i['cid'],i['titleFormat'] + ' ' + i['title']])
      except:
        id_list.append([i['aid'],'第' + str(i['index']) + '話 ' + i['index_title']])

  # qn引數就是視訊清晰度
  # 可選值：
  # 116: 高清1080P60 (需要帶入大會員的cookie中的SESSDATA才行,普通使用者的SESSDATA最多隻能下載1080p的視訊,不帶入SESSDATA就只能下載480p的)
  # 112: 高清1080P+ (hdflv2) (需要大會員)
  # 80: 高清1080P (flv)
  # 74: 高清720P60 (需要大會員)
  # 64: 高清720P (flv720)
  # 32: 清晰480P (flv480)
  # 16: 流暢360P (flv360)
  print('請輸入您要下載視訊的清晰度(1080p60:116;1080p+:112;1080p:80;720p60:74;720p:64;480p:32;360p:16; **注意:1080p+,1080p60,720p60都需要帶入大會員的cookie中的SESSDATA才行,普通使用者的SESSDATA最多隻能下載1080p的視訊):')
  quality = input('請輸入116或112或80或74或64或32或16:')
  threadpool = []
  title_list = []
  page = 1
  print(id_list)
  for item in id_list:
    aid = str(item[0])
    cid = str(item[1])
    title = item[2]
    title = re.sub(r'[\/\\:*?"<>|]','',title) # 替換為空的
    print('[下載番劇標題]:' + title)
    title_list.append(title)
    start_url = ep_url
    video_list = get_play_list(aid,quality)
    start_time = time.time()
    # down_video(video_list,page)
    # 定義執行緒
    if video_list != 'NoVIP':
      th = threading.Thread(target=down_video,args=(video_list,page))
      # 將執行緒加入執行緒池
      threadpool.append(th)
    page += 1

  # 開始執行緒
  for th in threadpool:
    th.start()
  # 等待所有執行緒執行完畢
  for th in threadpool:
    th.join()
  
  # 最後合併視訊
  print(title_list)
  combine_video(title_list)
  
  end_time = time.time() # 結束時間
  print('下載總耗時%.2f秒,約%.2f分鐘' % (end_time - start_time,int(end_time - start_time) / 60))
  # 如果是windows系統，下載完成後開啟下載目錄
  currentVideoPath = os.path.join(sys.path[0],'bilibili_video') # 當前目錄作為下載目錄
  if (sys.platform.startswith('win')):
    os.startfile(currentVideoPath)

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