Failure downloading transcript

[ferruccio]

Using build: 2016.03.25, I issued the command:

youtube-dl --id -ci --skip-download --no-check-certificate --write-sub --write-auto-sub --sub-lang en --sub-format ttml/vtt https://youtube.com/watch?v=z3iVAxxH56I

which yielded the following error:

[youtube] z3iVAxxH56I: Downloading webpage
[youtube] z3iVAxxH56I: Downloading video info webpage
[youtube] z3iVAxxH56I: Extracting video information
[youtube] z3iVAxxH56I: Looking for automatic captions
ERROR: 'ascii' codec can't encode characters in position 3-4: ordinal not in range(128)

I tried adding the --restrict-filenames option with no effect.

The title of this video is "Café Scientifique: Psychological Trauma and Resilience", which implies the é may be the source of the problem.

[yan12125]

Confirmed with Python2.7:

$ youtube-dl -vs --write-auto-sub "https://youtube.com/watch?v=z3iVAxxH56I"
[debug] System config: []
[debug] User config: []
[debug] Command-line args: [u'-vs', u'--write-auto-sub', u'https://youtube.com/watch?v=z3iVAxxH56I']
[debug] Encodings: locale UTF-8, fs UTF-8, out UTF-8, pref UTF-8
[debug] youtube-dl version 2016.03.18
[debug] Git HEAD: 53ec675
[debug] Python version 2.7.11 - Linux-4.5.0-1-ARCH-x86_64-with-glibc2.2.5
[debug] exe versions: avconv v12_dev0-2434-gf6ccee9, avprobe v12_dev0-2434-gf6ccee9, ffmpeg 3.0, ffprobe 3.0, rtmpdump 2.4
[debug] Proxy map: {}
[youtube] z3iVAxxH56I: Downloading webpage
[youtube] z3iVAxxH56I: Downloading video info webpage
[youtube] z3iVAxxH56I: Extracting video information
[youtube] z3iVAxxH56I: Looking for automatic captions
Traceback (most recent call last):
  File "<string>", line 23, in <module>
  File "/home/yen/Executables/Multimedia/youtube-dl/youtube_dl/__init__.py", line 419, in main
    _real_main(argv)
  File "/home/yen/Executables/Multimedia/youtube-dl/youtube_dl/__init__.py", line 409, in _real_main
    retcode = ydl.download(all_urls)
  File "/home/yen/Executables/Multimedia/youtube-dl/youtube_dl/YoutubeDL.py", line 1719, in download
    url, force_generic_extractor=self.params.get('force_generic_extractor', False))
  File "/home/yen/Executables/Multimedia/youtube-dl/youtube_dl/YoutubeDL.py", line 668, in extract_info
    ie_result = ie.extract(url)
  File "/home/yen/Executables/Multimedia/youtube-dl/youtube_dl/extractor/common.py", line 320, in extract
    return self._real_extract(url)
  File "/home/yen/Executables/Multimedia/youtube-dl/youtube_dl/extractor/youtube.py", line 1448, in _real_extract
    automatic_captions = self.extract_automatic_captions(video_id, video_webpage)
  File "/home/yen/Executables/Multimedia/youtube-dl/youtube_dl/extractor/common.py", line 1640, in extract_automatic_captions
    return self._get_automatic_captions(*args, **kwargs)
  File "/home/yen/Executables/Multimedia/youtube-dl/youtube_dl/extractor/youtube.py", line 1113, in _get_automatic_captions
    query=compat_urllib_parse.urlencode(caption_qs, True)))
  File "/usr/lib/python2.7/urllib.py", line 1372, in urlencode
    l.append(k + '=' + quote_plus(str(elt)))
UnicodeEncodeError: 'ascii' codec can't encode characters in position 3-4: ordinal not in range(128)

Please post the full verbose log with -v the next time.