"ValueError: insecure string pickle" when trying to download mp3

[dfrho]

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Make sure you are using the latest version: run youtube-dl --version and ensure your version is 2016.07.28. If it's not read this FAQ entry and update. Issues with outdated version will be rejected.

• [x ] I've verified and I assure that I'm running youtube-dl 2016.07.28

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• [x ] At least skimmed through README and most notably FAQ and BUGS sections
• [ x] Searched the bugtracker for similar issues including closed ones

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

Davids-Air:~ davidrhodes$ youtube-dl -x https://www.youtube.com/watch?v=bAQzwR9A51Y -v
[debug] System config: []
[debug] User config: []
[debug] Command-line args: [u'-x', u'https://www.youtube.com/watch?v=bAQzwR9A51Y', u'-v']
[debug] Encodings: locale UTF-8, fs utf-8, out UTF-8, pref UTF-8
[debug] youtube-dl version 2016.07.28
[debug] Python version 2.7.10 - Darwin-15.5.0-x86_64-i386-64bit
...
<end of log>

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If the purpose of this issue is a site support request please provide all kinds of example URLs support for which should be included (replace following example URLs by yours):

• Single video: https://www.youtube.com/watch?v=BaW_jenozKc
• Single video: https://youtu.be/BaW_jenozKc
• Playlist: https://www.youtube.com/playlist?list=PL4lCao7KL_QFVb7Iudeipvc2BCavECqzc

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Description of your issue, suggested solution and other information

Trying to download mp3 version and getting the following error message:
Traceback (most recent call last):
File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/runpy.py", line 162, in _run_module_as_main
"main", fname, loader, pkg_name)
File "/System/Library/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
File "/usr/local/bin/youtube-dl/youtube_dl/init.py", line 422, in main
File "/usr/local/bin/youtube-dl/youtube_dl/init.py", line 389, in _real_main
File "/usr/local/bin/youtube-dl/youtube_dl/YoutubeDL.py", line 365, in init
File "/usr/local/bin/youtube-dl/youtube_dl/postprocessor/ffmpeg.py", line 184, in init
File "/usr/local/bin/youtube-dl/youtube_dl/postprocessor/ffmpeg.py", line 48, in init
File "/usr/local/bin/youtube-dl/youtube_dl/postprocessor/ffmpeg.py", line 105, in _determine_executables
File "/usr/local/bin/youtube-dl/youtube_dl/postprocessor/ffmpeg.py", line 105, in
File "/usr/local/bin/youtube-dl/youtube_dl/utils.py", line 1762, in get_exe_version
File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/subprocess.py", line 710, in init
errread, errwrite)
File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/subprocess.py", line 1334, in _execute_child
child_exception = pickle.loads(data)
File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/pickle.py", line 1382, in loads
return Unpickler(file).load()
File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/pickle.py", line 858, in load
dispatchkey
File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/pickle.py", line 966, in load_string
raise ValueError, "insecure string pickle"
ValueError: insecure string pickle

[dfrho]

see previous issue in comments, will try those suggestions.