UnicodeEncodeError when writing .info.json file

[ivan]

Running e07e931 with Python 2.7.8 on Windows 7 or Windows 8.1:

C:\Users\root>C:\cygwin64\bin\git clone --depth 1 https://github.com/rg3/youtube-dl
Cloning into 'youtube-dl'...
remote: Counting objects: 502, done.
remote: Compressing objects: 100% (492/492), done.
Receiving objects:  96% (482/502), 512.01 KiB | 1006.00 KiB/s   remote: Total 50
Receiving objects: 100% (502/502), 648.69 KiB | 1006.00 KiB/s, done.
Resolving deltas: 100% (8/8), done.
Checking connectivity... done.
Checking out files: 100% (489/489), done.

C:\Users\root>cd youtube-dl

C:\Users\root\youtube-dl>cd youtube-dl

C:\Users\root\youtube-dl>set PYTHONPATH=.

C:\Users\root\youtube-dl>C:\Python27\python.exe -m youtube_dl --write-info-json d9Qf_yFKawI
[youtube] Confirming age
[youtube] d9Qf_yFKawI: Downloading webpage
[youtube] d9Qf_yFKawI: Downloading video info webpage
[youtube] d9Qf_yFKawI: Extracting video information
[youtube] d9Qf_yFKawI: Downloading DASH manifest
[info] Writing video description metadata as JSON to: Shokojo Seira ?????? Eps 8 ENG-d9Qf_yFKawI.info.json
Traceback (most recent call last):
  File "C:\Python27\lib\runpy.py", line 162, in _run_module_as_main
    "__main__", fname, loader, pkg_name)
  File "C:\Python27\lib\runpy.py", line 72, in _run_code
    exec code in run_globals
  File "C:\Users\root\youtube-dl\youtube_dl\__main__.py", line 18, in <module>
    youtube_dl.main()
  File "youtube_dl\__init__.py", line 356, in main
    _real_main(argv)
  File "youtube_dl\__init__.py", line 346, in _real_main
    retcode = ydl.download(all_urls)
  File "youtube_dl\YoutubeDL.py", line 1094, in download
    res = self.extract_info(url)
  File "youtube_dl\YoutubeDL.py", line 547, in extract_info
    return self.process_ie_result(ie_result, download, extra_info)
  File "youtube_dl\YoutubeDL.py", line 593, in process_ie_result
    return self.process_video_result(ie_result, download=download)
  File "youtube_dl\YoutubeDL.py", line 870, in process_video_result
    self.process_info(new_info)
  File "youtube_dl\YoutubeDL.py", line 1004, in process_info
    write_json_file(info_dict, infofn)
  File "youtube_dl\utils.py", line 91, in write_json_file
    'prefix': path_basename(fn) + '.',
  File "youtube_dl\utils.py", line 82, in <lambda>
    path_basename = lambda f: os.path.basename(fn).decode(encoding)
  File "C:\Python27\lib\encodings\mbcs.py", line 21, in decode
    return mbcs_decode(input, errors, True)
UnicodeEncodeError: 'ascii' codec can't encode characters in position 14-19: ordinal not in range(128)

C:\Users\root\youtube-dl>C:\Python27\python.exe --version
Python 2.7.8

[ivan]

PR: #4247