[Feature Request]: Manually specify character encoding / codepage / mcp

[Silverlan]

Feature description

I have a zip-archive which contains file names with Japanese characters.
When opening or extracting the archive with 7zip, the files are displayed with incorrect encoding:

The same happens when extracting the archive using bit7z.

I can, however, extract the files properly by using the "-mcp" option of 7z:
7z x -mcp=932 "スマトラ im11462659.zip"

(932 = Shift-JIS encoding)

As far as I can tell, there's currently no way to specify this option when using bit7z right now. Could this be added in a future update please?

The archive I've used for testing can be downloaded here: https://bowlroll.net/file/323005 (Scroll down for download button.)

I know about the solution using a manifest file mentioned here:
#163 (comment)

This does not work in my case, as I need a specific encoding for specific archive files only.

Additional context

No response

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[rikyoz]

Hi!

As far as I can tell, there's currently no way to specify this option when using bit7z right now.

Yeah, it's not supported at the moment.

Could this be added in a future update please?

I think it is possible. The API that 7-Zip provides for setting the codepage wasn't very clear. But after reading 7-Zip's source code, I managed to understand how to achieve it and made a working proof-of-concept.
I still need to work out the optimal API and implementation.
I hope to add it for the next v4.0.9.

Thanks for suggesting this feature! 🙏