ARD Mediathek: Downlaod fails with error "Protocol not found"

[hendryque]

• I've verified and I assure that I'm running youtube-dl 2018.06.25

• At least skimmed through the README, most notably the FAQ and BUGS sections

• Searched the bugtracker for similar issues including closed ones

• Checked that provided video/audio/playlist URLs (if any) are alive and playable in a browser

What is the purpose of your issue?

• Bug report (encountered problems with youtube-dl)
• Site support request (request for adding support for a new site)
• Feature request (request for a new functionality)
• Question
• Other

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The following sections concretize particular purposed issues, you can erase any section (the contents between triple ---) not applicable to your issue

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If the purpose of this issue is a bug report, site support request or you are not completely sure provide the full verbose output as follows:

Add the -v flag to your command line you run youtube-dl with (youtube-dl -v <your command line>), copy the whole output and insert it here. It should look similar to one below (replace it with your log inserted between triple ```):

 youtube-dl https://www.ardmediathek.de/tv/Filme-im-Ersten/Die-Büffel-sind-los/Das-Erste/Video\?bcastId\=1933898\&documentId\=53699580 -v
[debug] System config: []
[debug] User config: [u'--no-mtime', u'-o', u'~/Movies/%(title)s.%(ext)s']
[debug] Custom config: []
[debug] Command-line args: [u'https://www.ardmediathek.de/tv/Filme-im-Ersten/Die-B\xfcffel-sind-los/Das-Erste/Video?bcastId=1933898&documentId=53699580', u'-v']
[debug] Encodings: locale UTF-8, fs utf-8, out UTF-8, pref UTF-8
[debug] youtube-dl version 2018.06.25
[debug] Python version 2.7.15 (CPython) - Darwin-17.6.0-x86_64-i386-64bit
[debug] exe versions: avconv 12.3, avprobe 12.3, ffmpeg 4.0.1, ffprobe 4.0.1
[debug] Proxy map: {}
[ARD:mediathek] 53699580: Downloading webpage
[ARD:mediathek] 53699580: Downloading media JSON
[ARD:mediathek] 53699580: Downloading f4m manifest
[ARD:mediathek] 53699580: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[debug] Invoking downloader on u'https://dasersteuni-vh.akamaihd.net/i/int/2016/10/20/b6aa7492-7c41-4a1b-87ff-4826189dcac4/,480-1,640-1,960-1,512-1,320-1,.mp4.csmil/index_2_av.m3u8?null=0'
[download] Destination: /Users/user/Movies/Die Büffel sind los!.mp4
[debug] avconv command line: avconv -y -loglevel verbose -headers 'Accept-Language: en-us,en;q=0.5
Accept-Encoding: gzip, deflate
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:59.0) Gecko/20100101 Firefox/59.0 (Chrome)
Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7
Cookie: _alid_=/wESHwse0YE6o5pboIIu9w==
' -i 'https://dasersteuni-vh.akamaihd.net/i/int/2016/10/20/b6aa7492-7c41-4a1b-87ff-4826189dcac4/,480-1,640-1,960-1,512-1,320-1,.mp4.csmil/index_2_av.m3u8?null=0' -c copy -f mp4 'file:/Users/user/Movies/Die Büffel sind los!.mp4.part'
avconv version 12.3, Copyright (c) 2000-2018 the Libav developers
  built on Feb 13 2018 11:17:07 with Apple LLVM version 9.0.0 (clang-900.0.39.2)
  configuration: --disable-debug --disable-shared --disable-indev=jack --prefix=/usr/local/Cellar/libav/12.3 --enable-gpl --enable-nonfree --enable-version3 --enable-vda --cc=clang --host-cflags= --host-ldflags= --enable-libfaac --enable-libfdk-aac --enable-libfreetype --enable-libmp3lame --enable-libopus --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libxvid
  libavutil     55. 20. 0 / 55. 20. 0
  libavcodec    57. 25. 0 / 57. 25. 0
  libavformat   57.  7. 2 / 57.  7. 2
  libavdevice   56.  1. 0 / 56.  1. 0
  libavfilter    6.  7. 0 /  6.  7. 0
  libavresample  3.  0. 0 /  3.  0. 0
  libswscale     4.  0. 0 /  4.  0. 0
https://dasersteuni-vh.akamaihd.net/i/int/2016/10/20/b6aa7492-7c41-4a1b-87ff-4826189dcac4/,480-1,640-1,960-1,512-1,320-1,.mp4.csmil/index_2_av.m3u8?null=0: Protocol not found


ERROR: ffmpeg exited with code 1
  File "/usr/local/Cellar/python@2/2.7.15_1/Frameworks/Python.framework/Versions/2.7/lib/python2.7/runpy.py", line 174, in _run_module_as_main
    "__main__", fname, loader, pkg_name)
  File "/usr/local/Cellar/python@2/2.7.15_1/Frameworks/Python.framework/Versions/2.7/lib/python2.7/runpy.py", line 72, in _run_code
    exec code in run_globals
  File "/usr/local/bin/youtube-dl/__main__.py", line 19, in <module>
    youtube_dl.main()
  File "/usr/local/bin/youtube-dl/youtube_dl/__init__.py", line 472, in main
    _real_main(argv)
  File "/usr/local/bin/youtube-dl/youtube_dl/__init__.py", line 462, in _real_main
    retcode = ydl.download(all_urls)
  File "/usr/local/bin/youtube-dl/youtube_dl/YoutubeDL.py", line 2001, in download
    url, force_generic_extractor=self.params.get('force_generic_extractor', False))
  File "/usr/local/bin/youtube-dl/youtube_dl/YoutubeDL.py", line 803, in extract_info
    return self.process_ie_result(ie_result, download, extra_info)
  File "/usr/local/bin/youtube-dl/youtube_dl/YoutubeDL.py", line 857, in process_ie_result
    return self.process_video_result(ie_result, download=download)
  File "/usr/local/bin/youtube-dl/youtube_dl/YoutubeDL.py", line 1635, in process_video_result
    self.process_info(new_info)
  File "/usr/local/bin/youtube-dl/youtube_dl/YoutubeDL.py", line 1908, in process_info
    success = dl(filename, info_dict)
  File "/usr/local/bin/youtube-dl/youtube_dl/YoutubeDL.py", line 1847, in dl
    return fd.download(name, info)
  File "/usr/local/bin/youtube-dl/youtube_dl/downloader/common.py", line 364, in download
    return self.real_download(filename, info_dict)
  File "/usr/local/bin/youtube-dl/youtube_dl/downloader/external.py", line 64, in real_download
    self.get_basename(), retval))
  File "/usr/local/bin/youtube-dl/youtube_dl/downloader/common.py", line 165, in report_error
    self.ydl.report_error(*args, **kargs)
  File "/usr/local/bin/youtube-dl/youtube_dl/YoutubeDL.py", line 620, in report_error
    self.trouble(error_message, tb)
  File "/usr/local/bin/youtube-dl/youtube_dl/YoutubeDL.py", line 582, in trouble
    tb_data = traceback.format_list(traceback.extract_stack())

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Description of your issue, suggested solution and other information

The download fails with the error "Protocol not found".

[dstftw]

avconv is built without https support.