youtube-dl using wrong file names internally for video with Russian title

[hurda]

youtube-dl version 2014.01.23.4

URL: https://www.youtube.com/watch?v=8ke_HEaWrLY

Console-log:

C:\Users\user\Desktop>youtube-dl.exe -f 134+140 https://www.youtube.com/watch?v=8ke_HEaWrLY
[youtube] Setting language
[youtube] 8ke_HEaWrLY: Downloading webpage
[youtube] 8ke_HEaWrLY: Downloading video info webpage
[youtube] 8ke_HEaWrLY: Extracting video information
[download] Destination:   ,  -8ke_HEaWrLY.f134.mp4
[download] 100% of 1.37MiB in 00:03
[download] Destination:   ,  -8ke_HEaWrLY.f140.m4a
[download] 100% of 586.57KiB in 00:01
[ffmpeg] Merging formats into "  ,  -8ke_HEaWrLY.mp4"
ERROR:   ,  -8ke_HEaWrLY.f134.mp4: No such file or directory

But the names of the downloaded files are Супер Быстрая Девочка, Нереальная Скорость-8ke_HEaWrLY.f134.mp4 and Супер Быстрая Девочка, Нереальная Скорость-8ke_HEaWrLY.f140.m4a.

It's working with --restrict-filenames, but it shouldn't be necessary.

PS: I know -f 134+140 isn't necessary for this video, it was just a test.

EDIT:

C:\Users\user\Desktop>youtube-dl.exe -f 134+140 -v https://www.youtube.com/watch?v=8ke_HEaWrLY
[debug] System config: []
[debug] User config: []
[debug] Command-line args: ['-f', '134+140', '-v', 'https://www.youtube.com/watch?v=8ke_HEaWrLY']
[debug] Encodings: locale 'cp1252', fs 'mbcs', out 'cp850', pref: 'cp1252'
[debug] youtube-dl version 2014.01.23.4
[debug] Python version 2.7.5 - Windows-7-6.1.7601-SP1
[debug] Proxy map: {}
[youtube] Setting language
[youtube] 8ke_HEaWrLY: Downloading webpage
[youtube] 8ke_HEaWrLY: Downloading video info webpage
[youtube] 8ke_HEaWrLY: Extracting video information
[download] Destination:   ,  -8ke_HEaWrLY.f134.mp4
[download] 100% of 1.37MiB in 00:02
[download] Destination:   ,  -8ke_HEaWrLY.f140.m4a
[download] 100% of 586.57KiB in 00:01
[ffmpeg] Merging formats into "  ,  -8ke_HEaWrLY.mp4"
[debug] ffmpeg command line: ffmpeg -y -i '  ,  -8ke_HEaWrLY.f134.mp4' -i '  ,
-8ke_HEaWrLY.f140.m4a' -c copy '  ,  -8ke_HEaWrLY.mp4'
ERROR:   ,  -8ke_HEaWrLY.f134.mp4: No such file or directory
Traceback (most recent call last):
  File "youtube_dl\YoutubeDL.pyo", line 1016, in post_process
  File "youtube_dl\postprocessor\ffmpeg.pyo", line 483, in run
  File "youtube_dl\postprocessor\ffmpeg.pyo", line 61, in run_ffmpeg_multiple_fi
les
FFmpegPostProcessorError

[hurda]

Switching cmd's codepage to 65001 (utf8) has no effect:

C:\Users\user\Desktop>youtube-dl.exe -s --get-filename -v https://www.youtube.com/watch?v=8ke_HEaWrLY
[debug] System config: []
[debug] User config: []
[debug] Command-line args: ['-s', '--get-filename', '-v', 'https://www.youtube.com/watch?v=8ke_HEaWrLY']
[debug] Encodings: locale 'cp1252', fs 'mbcs', out 'cp65001', pref: 'cp1252'
[debug] youtube-dl version 2014.01.23.4
[debug] Python version 2.7.5 - Windows-7-6.1.7601-SP1
[debug] Proxy map: {}
  ,  -8ke_HEaWrLY.mp4

[ivan]

This should work when running youtube-dl with Python 3.4.

Python 2.x's subprocess doesn't really work with Unicode on Windows (http://bugs.python.org/issue19264). I used to use 8.3 filenames to work around this, but it doesn't work for .webm files. Also, 8.3 filenames are being phased out in Windows 8.1 for performance reasons.

[hurda]

The bug happens with the compiled executable.

[dstftw]

This was fixed with switch to python 3.4 for Windows build.