我正在尝试通过python从youtube下载视频。我已经成功下载了mp4文件，但无法将mp4转换为mp3。我曾尝试使用ffmpeg，但从未成功。
我尝试了ffmpeg，youtube-dl和vlc。我正在尝试不使用VLC，因为以后无法在pi上使用它。
import urllib.request
import urllib.parse
import pytube
import re
import os
from moviepy.editor import *
#Takes users input and searches youtube for request
query_string = urllib.parse.urlencode({"search_query" : input('Search:
')})
html_content =
urllib.request.urlopen("http://www.youtube.com/results?" +
query_string)
search_results= re.findall(r'href=\"\/watch\?v=(.
{11})',html_content.read().decode())
url=("https://www.youtube.com/watch?v=" + search_results[0])
#print("https://www.youtube.com/watch?v=" + search_results[0])
print (url) #prints url
#returns url for requested search
video_url = 'https://www.youtube.com/watch?v=' + search_results[0]
#print(video_url)
youtube1 = pytube.YouTube(video_url)
video = youtube1.streams.first()
#video.download('\\Users\\dseni\\PycharmProjects\\SmartMirror1\\Music')
video.download('\\Users\dseni\Music\Py-Music\\Music')
print(video_url)
print(youtube1)
print()
#path = 'C:\\Users\\dsenic\PycharmProjects\\SmartMirror1\\Music\\'
path = 'C:\\Users\\dsenic\Music\\Py-Music\\Music'
files = []
#Is suppose to change all files in mp4 format to mp3
video_mp4 = VideoFileClip(os.path.join("\\Users\\dseni\\Music\\Py-
Music\\Music"))
video_mp4.audio.write_audiofile(os.path.join('\\User\\dseni\\Music\\
Py-Music'))
print('Complete')
This is the error I get:
Traceback (most recent call last):
File "C:\Users\dseni\PycharmProjects\SmartMirror1\venv\lib\site-
packages\moviepy\video\io\ffmpeg_reader.py", line 287, in
ffmpeg_parse_infos
line = [l for l in lines if keyword in l][index]
IndexError: list index out of range
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File
"C:/Users/dseni/PycharmProjects/SmartMirror1/Youtubemp3_Test1.py",
line 46, in <module>
video_mp4 =
VideoFileClip(os.path.join("\\Users\\dseni\\Music\\Py-
Music\\Music"))
File "C:\Users\dseni\PycharmProjects\SmartMirror1\venv\lib\site-
packages\moviepy\video\io\VideoFileClip.py", line 91, in __init__
fps_source=fps_source)
File "C:\Users\dseni\PycharmProjects\SmartMirror1\venv\lib\site-
packages\moviepy\video\io\ffmpeg_reader.py", line 33, in __init__
fps_source)
File "C:\Users\dseni\PycharmProjects\SmartMirror1\venv\lib\site-
packages\moviepy\video\io\ffmpeg_reader.py", line 293, in
ffmpeg_parse_infos
filename, infos))
OSError: MoviePy error: failed to read the duration of file
\Users\dseni\Music\Py-Music\Music.
Here are the file infos returned by ffmpeg:
ffmpeg version 4.1 Copyright (c) 2000-2018 the FFmpeg developers
built with gcc 8.2.1 (GCC) 20181017
configuration: --enable-gpl --enable-version3 --enable-sdl2 --
enable-
fontconfig --enable-gnutls --enable-iconv --enable-libass --enable-
libbluray --enable-libfreetype --enable-libmp3lame --enable-
libopencore-
amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-
libopus --
enable-libshine --enable-libsnappy --enable-libsoxr --enable-
libtheora --
enable-libtwolame --enable-libvpx --enable-libwavpack --enable-
libwebp --
enable-libx264 --enable-libx265 --enable-libxml2 --enable-libzimg --
enable-lzma --enable-zlib --enable-gmp --enable-libvidstab --enable-
libvorbis --enable-libvo-amrwbenc --enable-libmysofa --enable-
libspeex --
enable-libxvid --enable-libaom --enable-libmfx --enable-amf --
enable-
ffnvcodec --enable-cuvid --enable-d3d11va --enable-nvenc --enable-
nvdec --
enable-dxva2 --enable-avisynth
libavutil 56. 22.100 / 56. 22.100
libavcodec 58. 35.100 / 58. 35.100
libavformat 58. 20.100 / 58. 20.100
libavdevice 58. 5.100 / 58. 5.100
libavfilter 7. 40.101 / 7. 40.101
libswscale 5. 3.100 / 5. 3.100
libswresample 3. 3.100 / 3. 3.100
libpostproc 55. 3.100 / 55. 3.100
\Users\dseni\Music\Py-Music\Music: Permission denied
预期结果是：
A）用户请求某种类型的歌曲，该程序将搜索youtube，找到链接，下载与该链接关联的文件并播放音频。
B）用户将下载多首歌曲，从而创建一个库。之后，用户将能够搜索他们的音乐库，选择特定的歌曲，然后按选择播放。
我希望能够暂停甚至播放整个文件（例如播放列表），但是现在我只希望播放实际的音频文件（mp3）。为此，我需要将mp4转换为mp3或将youtube文件下载为mp3。这是我的第一篇文章，所以请告知我是否需要提供其他信息。对不起，代码字符串和错误。