我正在使用 Python 制作这个 youtube 下载器 GUI：它会询问 URL，为您提供可能的质量设置列表，并使用 youtube-dl 下载选定的视频文件和最佳音频文件。但是，当我告诉 ffmpeg 合并两个单独的下载文件时，它什么也没做，控制台中也没有说什么。有什么我想念的吗？
这是代码的相关部分（从第 153 行开始）：
#Adding input arguments for ffmpeg
ffmpeg_video = ffmpeg.input(self.video_title)
ffmpeg_audio = ffmpeg.input(self.audio_title)
output_ffmpeg_title = './videos/' + self.youtube_title
#Merging with ffmpeg
out = ffmpeg.output(ffmpeg_video, ffmpeg_audio, output_ffmpeg_title, vcodec='copy', acodec='aac')
out.run
这是完整的代码：
import youtube_dl
import tkinter as tk
import operator
import ffmpeg
class GUI:
def __init__(self):
#Creating initial window
self.window = tk.Tk()
self.window.title('YTDL')
self.window.geometry('300x70')
self.urlbox = tk.Entry(self.window)
self.urlbox.pack(padx=5,pady=5)
#Creating download button, which will open the format selection window
downbutton = tk.Button(self.window, text="Download", command= self.check_url)
downbutton.pack(padx=5, pady=5)
#Creating a variable to keep track of the point in the GUI options selection
self.format_select_process = False
self.window.mainloop()
def check_url(self):
#Saving selected URL to variable
self.selected_url = self.urlbox.get()
self.urlbox.delete(0, 'end')
#If something was written in the URL box, try to go the next step
if len(self.selected_url) != 0:
self.get_formats(self.selected_url)
else:
print('URL box is empty!')
def get_formats(self, x):
with youtube_dl.YoutubeDL() as ydl:
meta = ydl.extract_info(x, download=False)
#Save formats from 'meta' to 'self.formats'
self.formats = meta.get('formats', [meta])
self.youtube_title = meta.get('title', [meta])
#Creating two dictionaries for the list of format sizes and extensions
self.f_list_size_dict = {}
self.f_list_ext_dict = {}
#Creating audio format list
self.audio_format_list = []
#For every format in self.formats, add its format, extension, fps and filesize to self.f_list
for f in self.formats:
self.f_list = '-' + f['format']+ ' -' + f['ext'] + ' -' + str(f['fps']) + ' ' + str(f['filesize'])
if 'audio only' in f['format']:
#Add an element to each dictonary whose name is the format ID and whose value is its filesize/extension
self.f_list_size_dict[f['format'].split(' -')[0]] = f['filesize']
self.f_list_ext_dict[f['format'].split(' -')[0]] = f['ext']
#Add to the audio format list the current audio format ID
self.audio_format_list.append(f['format'].split(' -')[0])
print('Audio format list:')
print(self.audio_format_list)
print('Size list dict:')
print(self.f_list_size_dict)
print('Ext list size dict:')
print(self.f_list_ext_dict)
"""
#Making a new list which only contains the audio format IDs
self.audio_format_list = str(self.f_list_size_dict.keys()).split('([')[1]
self.audio_format_list = self.audio_format_list.split('])')[0]
self.audio_format_list = self.audio_format_list.replace("'", "")
self.audio_format_list = self.audio_format_list.split(', ')
print('Cleaned up audio format list:')
print(self.audio_format_list)
"""
#Here the program starts looking for the best audio format
#In the try block, the program gets the best audio format's ID from the size dict and extension from the ext dict
#In the except block, the program gets the ID from the audio format list and the extension from the ext dict
try:
self.highest_audio = max(self.f_list_size_dict.items(), key=operator.itemgetter(1))[0]
self.highest_audio_ext = self.f_list_ext_dict.get(self.highest_audio)
print('Best audio format ID: ' + self.highest_audio)
print('Best audio format extension: ' + self.highest_audio_ext)
except:
self.highest_audio = max(self.audio_format_list)
self.highest_audio_ext = self.f_list_ext_dict.get(self.highest_audio)
print(self.highest_audio)
print(self.highest_audio_ext)
#Going to next sted of the code, which renders the format choice window
self.format_select()
def format_select(self):
self.window.withdraw()
format_select_window = tk.Toplevel()
format_select_window.attributes('-topmost', True)
format_select_window.geometry("300x350")
format_select_window_label = tk.Label(format_select_window, text="Select the video format")
format_select_window_label.pack(padx=5, pady=5)
format_select_window.protocol('WM_DELETE_WINDOW', lambda: exit())
self.format_listbox = tk.Listbox(format_select_window, height=15, width=40, yscrollcommand=1)
self.format_listbox.pack(padx=10, pady=10)
for index, item in enumerate(self.f_list):
self.f_list_lenght = index
download_button = tk.Button(format_select_window, text='Download', command=self.download)
download_button.pack(padx=10, pady=10)
#Adding options to the listbox
for f in self.formats:
#If it is adding an audio only format, it will add the ID, filesize (if possible with try block) and extension
if 'audio only' in f['format'] + ' ' + str(f['fps']) + ' FPS ' + f['ext']:
try:
mb_filesize = round(f['filesize'] / 1024 / 1024, 2)
self.format_listbox.insert(self.f_list_lenght, f['format'] + ' ' + str(mb_filesize) + ' MiB ' + f['ext'])
except:
self.format_listbox.insert(self.f_list_lenght, f['format'] + ' ' + f['ext'])
#If it is adding a video format, it will add the ID, FPS, filesize (if possible with the try block) and extension
else:
try:
mb_filesize = round(f['filesize'] / 1024 / 1024, 2)
self.format_listbox.insert(self.f_list_lenght, f['format'] + ' ' + str(f['fps']) + ' FPS' + ' ' + str(mb_filesize) + ' MiB ' + f['ext'])
except:
self.format_listbox.insert(self.f_list_lenght, f['format'] + ' ' + str(f['fps']) + ' FPS ' + f['ext'])
def download(self):
#Getting the list position of the selected format
selected_format_list_position = self.format_listbox.curselection()
#Getting the text of the selected format list item
selected_format = self.format_listbox.get(selected_format_list_position)
print('Selected format: ' + selected_format)
#Cutting from the selected format list item text everything past ' -' to only get the format's ID
selected_format_id = selected_format.split(' -')[0]
print('Selected format ID: ' + selected_format_id)
#Converting the ID to string
final_selected_format_id = str(selected_format_id)
print('Final selected format: ' + final_selected_format_id)
#Cutting from the selected format list item text everything before ' ' to only get the extension
final_ext = selected_format.split(' ')[1]
print('Final video extension: ' + final_ext)
if 'audio only' in selected_format:
#Creating the download options dictionary (not working):
#Setting the download location to the videos folder,
#preventing the program from downloading a whole playlist,
#telling youtube-dl to extract audio ('x'),
#giving youtube-dl the requested format (which is only audio).
self.ydl_opts = {'outtmpl':'./videos/%(title)s.%(ext)s', 'noplaylist': True, 'x': True, 'format': final_selected_format_id}
#Downloading
with youtube_dl.YoutubeDL(self.ydl_opts) as ydl:
ydl.download([self.selected_url])
elif 'audio only' not in selected_format:
#Adding '+bestaudio' to the selected format ID (which is only a video ID in this case)
final_selected_format_id_video_audio = str(selected_format_id) + '+bestaudio'
#Creating the download options dictionary:
#Setting the download location to the videos folder,
#preventing the program from downloading a whole playlist,
#giving youtube-dl the requested format with audio.
self.ydl_opts = {'outtmpl':'./videos/%(title)s.%(ext)s', 'noplaylist': True, 'format': final_selected_format_id_video_audio}
#Predicting the video file title and location for future ffmpeg merge
self.video_title = './videos/' + self.youtube_title + '.f' + str(selected_format_id) + '.' + final_ext
print('Video file title: ' + self.video_title)
#Predicting the audio file title and location for future ffmpeg merge
self.audio_title = './videos/' + self.youtube_title + '.f' + str(self.highest_audio) + '.' + self.highest_audio_ext
print('Audio file title: ' + self.audio_title)
#Downloading with youtube-dl
with youtube_dl.YoutubeDL(self.ydl_opts) as ydl:
ydl.download([self.selected_url])
#Adding input arguments for ffmpeg
ffmpeg_video = ffmpeg.input(self.video_title)
ffmpeg_audio = ffmpeg.input(self.audio_title)
output_ffmpeg_title = './videos/' + self.youtube_title
#Merging with ffmpeg
ffmpeg.output(ffmpeg_video, ffmpeg_audio, output_ffmpeg_title, vcodec='copy', acodec='aac')
GUI()
如果有更好的方法在 Python 中将 ffmpeg 与 youtube-dl 集成，请告诉我。