TypeError: execv() arg 2 must contain only strings

[Nothing4You]

youtube-dl was installed as binary from yt-dl.org.
youtube-dl -v -f 22/45/35/44/18/34/43/6/5/36/17/13 -x --audio-format mp3 --audio-quality 0 -k --add-metadata VZ0I0IsZEm0

[debug] System config: []
[debug] User config: []
[debug] Command-line args: ['-v', '-f', '22/45/35/44/18/34/43/6/5/36/17/13', '-x', '--audio-format', 'mp3', '--audio-quality', '0', '-k', '--add-metadata', 'VZ0I0IsZEm0']
[debug] Encodings: locale 'ANSI_X3.4-1968', fs 'ANSI_X3.4-1968', out 'ANSI_X3.4-1968', pref: 'ANSI_X3.4-1968'
[debug] youtube-dl version 2014.03.29
[debug] Python version 2.7.3 - Linux-2.6.32-openvz-042stab083.2-amd64-x86_64-with-debian-7.4
[debug] Proxy map: {}
[youtube] Setting language
[youtube] VZ0I0IsZEm0: Downloading webpage
[youtube] VZ0I0IsZEm0: Downloading video info webpage
[youtube] VZ0I0IsZEm0: Extracting video information
[download] Destination: The Braindrillerz @ Frenchcore s'il vous plat part 3-VZ0I0IsZEm0.mp4
[download] 100% of 5.95MiB in 00:00
[ffmpeg] Adding metadata to 'The Braindrillerz @ Frenchcore s'il vous plat part 3-VZ0I0IsZEm0.mp4'
[debug] ffmpeg command line: avconv -y -i 'The Braindrillerz @ Frenchcore s'"'"'il vous plat part 3-VZ0I0IsZEm0.mp4' -c copy -metadata date=20130309 -metadata artist=UNDERGROUND4EVER -metadata 'title=The Braindrillerz @ Frenchcore s'"'"'il vous plat part 3' 'The Braindrillerz @ Frenchcore s'"'"'il vous plat part 3-VZ0I0IsZEm0.temp.mp4'
Traceback (most recent call last):
  File "/usr/lib/python2.7/runpy.py", line 162, in _run_module_as_main
    "__main__", fname, loader, pkg_name)
  File "/usr/lib/python2.7/runpy.py", line 72, in _run_code
    exec code in run_globals
  File "/usr/local/bin/youtube-dl/__main__.py", line 18, in <module>
  File "/usr/local/bin/youtube-dl/youtube_dl/__init__.py", line 833, in main
  File "/usr/local/bin/youtube-dl/youtube_dl/__init__.py", line 823, in _real_main
  File "/usr/local/bin/youtube-dl/youtube_dl/YoutubeDL.py", line 1023, in download
  File "/usr/local/bin/youtube-dl/youtube_dl/YoutubeDL.py", line 520, in extract_info
  File "/usr/local/bin/youtube-dl/youtube_dl/YoutubeDL.py", line 557, in process_ie_result
  File "/usr/local/bin/youtube-dl/youtube_dl/YoutubeDL.py", line 804, in process_video_result
  File "/usr/local/bin/youtube-dl/youtube_dl/YoutubeDL.py", line 1006, in process_info
  File "/usr/local/bin/youtube-dl/youtube_dl/YoutubeDL.py", line 1057, in post_process
  File "/usr/local/bin/youtube-dl/youtube_dl/postprocessor/ffmpeg.py", line 472, in run
  File "/usr/local/bin/youtube-dl/youtube_dl/postprocessor/ffmpeg.py", line 64, in run_ffmpeg
  File "/usr/local/bin/youtube-dl/youtube_dl/postprocessor/ffmpeg.py", line 56, in run_ffmpeg_multiple_files
  File "/usr/lib/python2.7/subprocess.py", line 679, in __init__
    errread, errwrite)
  File "/usr/lib/python2.7/subprocess.py", line 1259, in _execute_child
    raise child_exception
TypeError: execv() arg 2 must contain only strings

[phihag]

Thank you for the report. The immediate problem has been fixed in youtube-dl 2014.03.30. Type sudo youtube-dl -U to update.

However, I believe embedding metadata will still fail, since the encoding you have configured (ANSI_X3.4-1968,, aka ASCII) does not support French characters. Either fix your platform's locale settings or use the new --encoding option. I'd use a configuration file for that.