Download of youtube audios sometimes aborts with "ERROR: unable to download video data: <urlopen error [Errno 0] Error>"

[Eucyon]

In maybe 10% of the cases, youtube-dl aborts after starting downloading audios from youtube without a really informative error message:

$ sudo youtube-dl -U
[sudo] Passwort für xy: 
Updating to version 2020.01.15 ...
Updated youtube-dl. Restart youtube-dl to use the new version.}
$ youtube-dl -v https://www.youtube.com/watch?v=ecocA1DwLn4
[debug] System config: []
[debug] User config: ['-f', 'bestaudio', '--no-mtime', '-R', 'infinite', '--fragment-retries', 'infinite', '-o', '~/Downloads/%(uploader)s: %(title)s.%(ext)s']
[debug] Custom config: []
[debug] Command-line args: ['-v', 'https://www.youtube.com/watch?v=ecocA1DwLn4']
[debug] Encodings: locale UTF-8, fs utf-8, out utf-8, pref UTF-8
[debug] youtube-dl version 2020.01.15
[debug] Python version 3.8.1 (CPython) - Linux-5.4.12-zen1-1-zen-x86_64-with-glibc2.2.5
[debug] exe versions: ffmpeg 4.2.2, ffprobe 4.2.2, rtmpdump 2.4
[debug] Proxy map: {}
[youtube] ecocA1DwLn4: Downloading webpage
[youtube] ecocA1DwLn4: Downloading video info webpage
[youtube] ecocA1DwLn4: Downloading MPD manifest
[debug] Invoking downloader on 'https://manifest.googlevideo.com/api/manifest/dash/expire/1579471899/ei/u38kXpWADcaA1gKL35vADg/ip/92.201.46.203/id/79ca1c0350f02e7e/source/youtube/requiressl/yes/playback_host/r1---sn-9nj-q0nl.googlevideo.com/mm/31%2C29/mn/sn-9nj-q0nl%2Csn-4g5ednls/ms/au%2Crdu/mv/m/mvi/0/pl/17/hfr/all/as/fmp4_audio_clear%2Cwebm_audio_clear%2Cwebm2_audio_clear%2Cfmp4_sd_hd_clear%2Cwebm2_sd_hd_clear/initcwndbps/1138750/vprv/1/mt/1579450186/fvip/4/fexp/23842630/itag/0/sparams/expire%2Cei%2Cip%2Cid%2Csource%2Crequiressl%2Chfr%2Cas%2Cvprv%2Citag/sig/ALgxI2wwRAIgawFcXR_4Wm0B1iHObzJ19z2Iq03u40Y57Y-wk2r6xMQCIFebuHNTapLeEwF4sw1YZI4VBNyDytuupLDAv0CW12bW/lsparams/playback_host%2Cmm%2Cmn%2Cms%2Cmv%2Cmvi%2Cpl%2Cinitcwndbps/lsig/AHylml4wRAIgN1qgOzuAa3yGBnRdC7yPng3pxTVcIgtFcLxMUth5IwQCICQP0Xv4o6ei_IYugTgzBa-y0dYBED6mkMKoA0PiHcvx'
[dashsegments] Total fragments: 349
[download] Destination: /home/a/Downloads/MEDIENTAGE MÜNCHEN: Audio-Summit - Künstliche Intelligenz, Daten, Algorithmen _ MEDIENTAGE MÜNCHEN.webm
[download]  16.6% of ~47.12MiB at  1.41MiB/s ETA 01:07ERROR: unable to download video data: <urlopen error [Errno 0] Error>
Traceback (most recent call last):
  File "/usr/lib/python3.8/urllib/request.py", line 1319, in do_open
    h.request(req.get_method(), req.selector, req.data, headers,
  File "/usr/lib/python3.8/http/client.py", line 1230, in request
    self._send_request(method, url, body, headers, encode_chunked)
  File "/usr/lib/python3.8/http/client.py", line 1276, in _send_request
    self.endheaders(body, encode_chunked=encode_chunked)
  File "/usr/lib/python3.8/http/client.py", line 1225, in endheaders
    self._send_output(message_body, encode_chunked=encode_chunked)
  File "/usr/lib/python3.8/http/client.py", line 1004, in _send_output
    self.send(msg)
  File "/usr/lib/python3.8/http/client.py", line 944, in send
    self.connect()
  File "/usr/lib/python3.8/http/client.py", line 1399, in connect
    self.sock = self._context.wrap_socket(self.sock,
  File "/usr/lib/python3.8/ssl.py", line 500, in wrap_socket
    return self.sslsocket_class._create(
  File "/usr/lib/python3.8/ssl.py", line 1040, in _create
    self.do_handshake()
  File "/usr/lib/python3.8/ssl.py", line 1309, in do_handshake
    self._sslobj.do_handshake()
OSError: [Errno 0] Error

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/local/bin/youtube-dl/youtube_dl/YoutubeDL.py", line 1925, in process_info
    success = dl(filename, info_dict)
  File "/usr/local/bin/youtube-dl/youtube_dl/YoutubeDL.py", line 1864, in dl
    return fd.download(name, info)
  File "/usr/local/bin/youtube-dl/youtube_dl/downloader/common.py", line 366, in download
    return self.real_download(filename, info_dict)
  File "/usr/local/bin/youtube-dl/youtube_dl/downloader/dash.py", line 48, in real_download
    success, frag_content = self._download_fragment(ctx, fragment_url, info_dict)
  File "/usr/local/bin/youtube-dl/youtube_dl/downloader/fragment.py", line 100, in _download_fragment
    success = ctx['dl'].download(fragment_filename, {
  File "/usr/local/bin/youtube-dl/youtube_dl/downloader/common.py", line 366, in download
    return self.real_download(filename, info_dict)
  File "/usr/local/bin/youtube-dl/youtube_dl/downloader/http.py", line 341, in real_download
    establish_connection()
  File "/usr/local/bin/youtube-dl/youtube_dl/downloader/http.py", line 109, in establish_connection
    ctx.data = self.ydl.urlopen(request)
  File "/usr/local/bin/youtube-dl/youtube_dl/YoutubeDL.py", line 2237, in urlopen
    return self._opener.open(req, timeout=self._socket_timeout)
  File "/usr/lib/python3.8/urllib/request.py", line 525, in open
    response = self._open(req, data)
  File "/usr/lib/python3.8/urllib/request.py", line 542, in _open
    result = self._call_chain(self.handle_open, protocol, protocol +
  File "/usr/lib/python3.8/urllib/request.py", line 502, in _call_chain
    result = func(*args)
  File "/usr/local/bin/youtube-dl/youtube_dl/utils.py", line 2726, in https_open
    return self.do_open(functools.partial(
  File "/usr/lib/python3.8/urllib/request.py", line 1322, in do_open
    raise URLError(err)
urllib.error.URLError: <urlopen error [Errno 0] Error>

Thank you!

[Cathy-t]

The same problem with you.Do you fix it ?
I find if the video is too long , the problem comes.

[Eucyon]

Dear @Cathy-t ,

I have no workaround.

I simply restart the download by repeating the same command, and the download continues.

[gatusokaka]

The same problem with you.Do you fix it ?
I find if the video is too long , the problem comes.

the video is short，the problem comes forever，sigh

[Eucyon]

Maybe this information is helpful: This problem seems to occur only for yt-video which have been rarely viewed or downloaded (ca. < 50 times).

[gatusokaka]

Maybe this information is helpful: This problem seems to occur only for yt-video which have been rarely viewed or downloaded (ca. < 50 times).

but the problem comes every videos downloaded by youtube-dl .you can check the debug infomation at https://www.reddit.com/r/youtubedl/comments/fx84wp/how_to_fix_the_error/
can you help me,thanks a lot.