windows: vipsthumbnail.exe not support unicode filename

[aisnote]

Questions, enhancements, tips, etc.

Please use libvips discussions for other topics.

https://github.com/libvips/libvips/discussions

Bug report

Describe the bug
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To Reproduce
Steps to reproduce the behavior:

1. change file name to chinese
2. run vipsthumbnail.exe chinese.heic
3. See error
   vipsthumbnail.exe: unable to thumbnail z??-?–?IMG_0021.HEIC
   heifload: Input file does not exist: Unspecified: Error opening file: No such file or directory (2)

Expected behavior
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Actual behavior
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Screenshots
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Environment
(please complete the following information)

• OS: Windows 10
• Vips: >vipsthumbnail.exe --vips-version
  libvips 8.8.0-Wed Apr 17 15:19:38 UTC 2019

Additional context
Add any other context about the problem here.

[jcupitt]

Hello @aisnote,

That's quite an old libvips. It should work with the current one -- I see:

$ ./vipsthumbnail.exe ~/pics/йцуке.heic
$ ./vipsheader.exe ~/pics/tn_йцуке.jpg
/home/john/pics/tn_йцуке.jpg: 128x96 uchar, 3 bands, srgb, jpegload
$ 

It won't display the filename correctly on the console, but that's a separate issue.

Try:

https://github.com/libvips/libvips/releases/download/v8.10.6/vips-dev-w64-all-8.10.6.zip