如何让用户在youtube dl中选择质量

Question

我正在构建一个简单的GUI应用程序(在Tkinter中(，使用youtube dl下载youtube视频。我知道如何让它下载最高分辨率，但我想包括一个下拉列表，允许用户选择他们想要下载视频的分辨率。我知道如何在GUI中制作实际的列表，只是不知道如何让youtube dl使用该分辨率(我只知道我可以使用'format': 'best'(。

Answer 1

这里使用这个：

import youtube_dl as yt
from tkinter import *
from tkinter import Tk, font, ttk

def display_options(*event):
hide()

ydl_opts = {}
resolutions = []
url = link.get()

valid = valid_link(url)  # check the validity of link

if valid:
with yt.YoutubeDL(ydl_opts) as ydl:
meta = ydl.extract_info(url, download=False) 
formats = meta.get('formats', meta) 
vid_title = meta.get('title', meta) # gets the title
title.config(text=f'Title: {vid_title}')
title.place(x=220, y=70)
for f in formats:
resolutions.append(f['format']) #filter to only formats
options['values'] = resolutions # sets combobox values to available resolutions
else:
error.config(text='Invalid link', fg='red')
error.place(x=150, y=210)
def valid_link(link): # function to check validity of the link

extractors = yt.extractor.gen_extractors()
for e in extractors:
if e.suitable(link) and e.IE_NAME != 'generic':
return True
return False

def download():
hide()
res = option_lst.get()
if res !=  'resolution':
res = int(res[:res.find('-')].strip())

ydl_opts = {'format': f'{res}', 
'outtmpl': r'C:yourPath%(title)s.%(ext)s'}  # specify your download path here
url = link.get()

with yt.YoutubeDL(ydl_opts) as ydl: 
ydl.download([url])
else:
error.config(text='Invalid resolution', fg='red')
error.place(x=150, y=210)

def hide():
title.place_forget()
error.place_forget()

root = Tk()
root.geometry('700x250')
root.title('YouTube Downloader')
link = StringVar()
option_lst = StringVar()
link.trace('w', display_options)
option_lst.set('resolution')
link_here = Label(root, text="Paste Here", font=(30))
link_here.place(x=220,y=40)
title = Label(root, text='')
title.place(x=220, y=230)
error = Label(root, text='')
error.place(x=220, y=210)
options = ttk.Combobox(root, textvariable=option_lst, state="readonly") 
options.place(x=300, y=210)
pasted = Entry(root,width=60,textvariable=link)
pasted.place(x=80,y=120)
Button(root,text="Download Video", width=20, bg="black", fg="gray", command=download).place(x=250,y=170)
root.mainloop()

如果你愿意，你可以进一步改进。