由于B站没有PC客户端，电脑下载视频很不方便，遂使用Tk编写一款B站视频下载工具，输入一个网址选择清晰度之后就能够下载对应的视频，可以下载单P、合集、合集单P，使用可视化GUI图形界面，交互性更强，来吧，展示~
一．准备工作
tkinter、os系统模块、re正则模块、subprocess新的进程模块、还有本次比较重要的ffmpeg.exe用于视频和音频的合并，关于ffmpeg请参考：
二．预览
1.启动
2.解析
解析出多个清晰度视频以供下载
3.下载中
4.下载完成
分别下载完视频和音频后，对它们进行合并，最后输出一个完整的视频文件
5.结果
1080P+，针不戳
三．设计流程
1.bilibili_video_spider
2.视频json的查找
- 首先查看网页源代码
- 在网页的这个js里，能够找到关于视频的相关视频、音频、视频质量、长度、格式...等信息，直接正则截取就好啦
- 紧接着，下面这个js里，就是视频的aid、分P信息、up主信息、相关视频推荐信息，也用正则就能截取
四．源代码
1.Bilibili_Video_Downloader-GUI
from tkinter import *
from tkinter import ttk
from tkinter import messagebox
import os
import threading
from bilibili_video_spider import Bibili_Video_Spider as sp2
import re
from my_util import My_Util
"""
GUI+Spider
"""
class App:
def __init__(self):
self.base_dir = './bilibili_videos/'
self.start_flag=''
self.has_more_flag=''
self.spider=sp2()
self.create_widget()
self.set_widget()
self.place_widget()
self.window.mainloop()
def create_widget(self):
self.window = Tk()
self.window.title('Bilibili_Video_Downloader-v1.0')
width = 450
height = 520
screen_width = self.window.winfo_screenwidth()
screen_height = self.window.winfo_screenheight()
left = (screen_width - width) / 2
top = (screen_height - height) / 2
self.window.geometry("%dx%d+%d+%d" % (width, height, left, top))
self.window.resizable(0, 0)
self.l1 = ttk.Label(self.window, text='请输入视频链接地址：')
self.e1_var=StringVar()
self.e1 = ttk.Entry(self.window, width=90,textvariable=self.e1_var)
self.l5 = ttk.Label(self.window, text='选择清晰度：')
self.combobox=ttk.Combobox(self.window,state='readonly',width=15,justify='center')
self.l2 = ttk.Label(self.window, text='当前状态：')
self.t1 = Text(self.window, width=80, height=20)
self.l3_var=StringVar()
self.l3 = ttk.Label(self.window, text='当前下载进度：',textvariable=self.l3_var)
self.progress=ttk.Progressbar(self.window,orient=HORIZONTAL,length=400,mode='determinate',value=0,maximum=100)
self.l4_var = StringVar()
self.l4_var.set('0.0%[未下载]')
self.l4 = ttk.Label(self.window, textvariable=self.l4_var)
self.b1 = ttk.Button(self.window, text='解析', command=lambda: self.thread_it(self.pre_analysis))
self.b2 = ttk.Button(self.window, text='下载', command=lambda: self.thread_it(self.donwload_video))
def set_widget(self):
self.window.protocol('WM_DELETE_WINDOW', self.quit_window)
self.window.bind('<Escape>', self.escape)
self.e1.bind('<Return>', self.enter)
self.b2.config(state=DISABLED)
self.combobox.config(value=['--请先解析--'])
self.combobox.current(0)
def place_widget(self):
self.l1.pack(anchor="w")
self.e1.pack(anchor="w", padx=20)
self.l5.pack(anchor="w",pady=5)
self.combobox.pack(anchor="center")
self.l2.pack(anchor="w")
self.t1.pack(anchor="w", padx=20)
self.l3.pack(anchor="w",pady=5)
self.progress.pack(pady=5)
self.l4.pack()
self.b1.pack(side='left', padx=90)
self.b2.pack(side='left', padx=10)
def pre_analysis(self):
input_video_link = self.e1.get()
input_video_link=input_video_link.strip()
if input_video_link.startswith(r'https://www.bilibili.com/video/'):
if '&' in input_video_link:
raw_link=input_video_link.split('&')[0]
else:
raw_link=input_video_link
try:
#av 转 bv
av_number = int(re.findall('https://www.bilibili.com/video/av(\d+)?', raw_link)[0])
url=raw_link.replace(av_number,My_Util().av_convert_bv(av_number))
except IndexError:
url=raw_link
self.spider.set_start_url(url)
self.spider.get_page_html()
self.video_number = self.spider.get_video_number()
base_title = self.spider.get_video_title()
if re.match('https://www.bilibili.com/video/.*\?p=\d+',url):
current_num=re.findall('https://www.bilibili.com/video/.*\?p=(\d+)',url)
self.has_more_flag=True
self.current_video_title=self.spider.part_name_list[int(current_num[0])]
else:
self.has_more_flag=False
self.current_video_title=base_title
self.entrace_url=url
self.analysis_videos(url)
if self.start_flag!=True:
self.b2.config(state=NORMAL)
# self.b1.config(state=DISABLED)
else:
messagebox.showwarning('警告', '请输入正确的分享链接！')
self.e1_var.set('')
def analysis_videos(self,url):
"""
:param url:
:return:
"""
My_Util().do_makedirs(self.base_dir)
self.video_item_ = self.spider.get_video_and_audio(self.spider.get_video_detail_json())
video_quality_list=[]
for video_detail in self.video_item_['video_detail']:
for data in video_detail.items():
video_quality_list.append(data[0])
self.combobox.config(value=video_quality_list)
self.combobox.current(0)
self.t1.delete(0.0,END)
self.insert_to_t1(f'[视频标题]：{self.current_video_title}')
self.insert_to_t1(f'[视频时长]：{self.video_item_["video_length"]}')
self.insert_to_t1(f'[视频清晰度]：{" ".join(video_quality_list)}')
self.insert_to_t1(f'请选择清晰度后点击下载按钮---------------',time_str=False)
def donwload_video(self):
self.start_flag=True
self.b2.config(state=DISABLED)
if self.has_more_flag:
ret = messagebox.askyesno('提示', '此视频包含多P，是否下载全集？')
if ret:
download_more=True
else:
download_more=False
else:
download_more=False
for i in range(self.video_number):
if download_more:
begin_url = self.entrace_url.split('?')[0] + f'?p={i+1}'
self.spider.video_title = self.spider.part_name_list[i]
current_title=self.spider.part_name_list[i]
else:
begin_url=self.entrace_url
self.spider.video_title = self.current_video_title
current_title =self.current_video_title
self.insert_to_t1(f'开始下载{current_title}---------------')
self.l3_var.set('视频下载进度：')
self.spider.set_start_url(begin_url)
video_item_ = self.spider.get_video_and_audio(self.spider.get_video_detail_json())
video_url_list=[]
for video_detail in video_item_['video_detail']:
for data in video_detail.items():
video_url_list.append(data[1])
download_url = video_url_list[self.combobox.current()]
current_video_name=self.spider.part_name_list[i]
for progrees, speed in self.spider.down_video(download_url,):
self.progress['value'] = progrees
self.l4_var.set(f'进度：%.1f%% 速度：%s' % (progrees, speed))
self.progress.update()
self.insert_to_t1(f'[{current_video_name}视频下载完成...')
self.l4_var.set('100%[下载完成]')
self.insert_to_t1('-' * 30)
audio_url = video_item_['audio_url']
self.insert_to_t1(f'开始下载{current_title}音频---------------')
self.l3_var.set('音频下载进度：')
for progrees, speed in self.spider.downlonad_autio(audio_url,):
self.progress['value'] = progrees
self.l4_var.set(f'进度：%.1f%% 速度：%s' % (progrees, speed))
self.progress.update()
self.insert_to_t1(f'[{current_video_name}音频下载完成...')
self.l4_var.set('100%[下载完成]')
self.insert_to_t1('-' * 30)
self.insert_to_t1(f'开始合并视频---------------')
if (self.spider.mix_video()):
self.insert_to_t1(f'清理临时视频文件完成---------------')
self.insert_to_t1(f'清理临时音频文件完成---------------')
self.insert_to_t1(f'合并视频完成---------------')
else:
self.insert_to_t1(f'发生了异常错误！---------------')
if not download_more:
break
self.b1.config(state=NORMAL)
self.b2.config(state=NORMAL)
def insert_to_t1(self,line,time_str=True):
if time_str==True:
time_string=My_Util().get_time_string()
self.t1.insert(END,f'[{time_string}]'+line+'\n')
else:
self.t1.insert(END,line+'\n')
self.t1.yview_moveto(1)
def open_dir(self):
abs_path = os.path.abspath(self.base_dir)
# 使用绝对路径打开文件夹
os.startfile(abs_path)
def quit_window(self):
ret = messagebox.askyesno('提示', '是否要退出？')
if ret == True:
self.window.destroy()
def escape(self,event):
self.quit_window()
def connect_author(self):
messagebox.showinfo('联系作者', '作者QQ：懷淰メ')
def enter(self,event):
self.thread_it(self.pre_analysis)
def thread_it(self,func, *args):
t = threading.Thread(target=func, args=args)
self.window.update()
t.setDaemon(True) # 设置守护，主线程结束，子线程结束
t.start()
if __name__ == '__main__':
App()
"""
test https://www.bilibili.com/video/BV1ML411J7es
"""
2.bilibili_video_spider
import json
import requests
import re
import os
import subprocess
from my_util import My_Util
import time
"""
版本2分别下载音频和视频，通过ffmpeg合并
三种情况
1.单P
2.多P下载单集
3.多P下载全集
"""
class Bibili_Video_Spider(object):
def __init__(self,):
self.s=requests.session()
self.headers={
'Content-Range': 'bytes 0-xxxxxx',
"user-agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.124 Safari/537.36"
}
self.util=My_Util()
def set_start_url(self,start_url):
self.start_url=start_url
self.get_page_html()
def get_video_title(self):
"""
起始视频标题，作为下载视频的目录名
:return:
"""
regx='name="keywords" content="(.*?),'
title=re.findall(regx,self.srart_html)
title=title[0]
return title
def get_page_html(self):
"""
获取网页源代码
:return:
"""
headers={
'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/69.0.3497.100 Safari/537.36',
'Content-Range': 'bytes 0-xxxxxx',
'Referer': self.start_url
}
r=self.s.get(self.start_url,headers=headers)
if r.status_code==200:
r.encoding='utf-8'
self.srart_html=r.text
def get_video_number(self):
"""
是否含有多P，若含有分P，则将所有分P名字存入list
:return:
"""
html_part = re.findall('window.__INITIAL_STATE__=(.*?)</script> <link rel="stylesheet"', self.srart_html)
part_json_str = html_part[0].split(';(function(){var')[0]
part_json = json.loads(part_json_str.strip())
pages = part_json['videoData']['pages']
self.part_name_list = [part_name['part'] for part_name in pages]
if len(pages)!=1:
part_number=len(pages)
else:
part_number=1
return part_number
def get_video_detail_json(self):
"""
获取视频详情json,里面包括视频m4a地址，以及audio音频，版本2主要依赖此Json
:return:
"""
regx='window.__playinfo__=(.*?)</script><script>window.__INITIAL_STATE'
video_json_=re.findall(regx,self.srart_html)
if video_json_:
video_json=json.loads(video_json_[0])
return video_json
def get_video_and_audio(self,page_json,):
"""
获取视频的视频和音频，准备合并
:param page_json:
:return:
"""
video_item={}
video_data=[]
data=page_json['data']
video_definition_list = data.get('accept_description')
video_detail_=data.get('dash').get('video')
video_link_list=[]
for video_detail__ in video_detail_:
video_url=video_detail__.get('baseUrl')
video_link_list.append(video_url)
for v in zip(video_definition_list,video_link_list):
item = {}
item[v[0]]=v[1]
video_data.append(item)
video_item['video_length']=self.util.Convert_Millis(page_json["data"]['timelength'])
video_item['audio_url'] = page_json["data"]["dash"]["audio"][0]["baseUrl"]
video_item['video_detail'] = video_data
return video_item
def down_video(self,video_url):
"""
下载视频
:param video_url:
:param number: 分P的索引从1开始
:return:
"""
start_time=time.time()
headers = {
'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/69.0.3497.100 Safari/537.36',
'Content-Range': 'bytes 0-xxxxxx',
'Referer': self.start_url
}
#下载视频
r = self.s.get(video_url, stream=True, headers=headers)
file_size=int(r.headers['Content-Length'])
count=0
with open(self.video_title+'-temp.mp4','wb')as f:
for chunk in r.iter_content(chunk_size=1024):
f.write(chunk)
count+=len(chunk)
progress=float(count/file_size*100)
speed = My_Util().format_size((count) / (time.time() - start_time)) + '/S'
yield progress,speed
def downlonad_autio(self,audio_url):
start_time=time.time()
headers = {
'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/69.0.3497.100 Safari/537.36',
'Content-Range': 'bytes 0-xxxxxx',
'Referer': self.start_url
}
r = self.s.get(audio_url, stream=True, headers=headers)
file_size=int(r.headers['Content-Length'])
count=0
with open(self.video_title+'-temp.aac','wb')as f:
for chunk in r.iter_content(chunk_size=1024):
f.write(chunk)
count+=len(chunk)
progress=float(count/file_size*100)
speed = My_Util().format_size((count) / (time.time() - start_time)) + '/S'
yield progress,speed
def mix_video(self,):
try:
# print(f'开始合并{self.video_title}...')
path = "ffmpeg.exe -i " + self.video_title + "-temp.mp4 -i " + self.video_title + "-temp.aac -vcodec copy -acodec copy " + self.video_title + ".mp4"
subprocess.call(path, shell=True, stdin=subprocess.PIPE, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
os.remove(self.video_title + "-temp.mp4")
# print('[清理临时视频文件完成]...')
os.remove(self.video_title + "-temp.aac")
# print('[清理临时音频文件完成]...')
return True
except :
return False
五．总结
- 本次使用tkinter加ffmpeg实现了B站视频的下载，支持所选视频的所有画质的下载，tkinter完成GUI的搭建，实现交互，spider实现视频的解析与下载，ffmpeg实现视频与音频的合并，初步实现了B站视频的下载，当然这只是1.0版本，仍存在一些不足。
1.代码逻辑混乱，复用率不高。（因为是分几天写成的，可能一些想法找不到了）。
2.主要功能较少，GUI的优势没有明显凸显出来（当前的功能，打包成命令行也能轻易实现）。
3.视频下载到了一个目录，应当将带有分P的全集视频，新建目录后下载（这里确实有点吹毛求疵，毕竟是1.0）。
期待下一个版本
程序打包好放在了蓝奏云，欢迎各位试用思路、代码方面有什么不足欢迎各位大佬指正、批评！