Accessing the content of a wim file inside a 7z file from commandline without extracting the 7z file first

[Robin Seeländer]

Hi Igor,

first of all i want to say thank you for this really helpful tool which i use since 15 years now.

i hope you can help me out.

I want to use the 7z strong compression to further reduce the size of a wim file.
I use the wim file as a container for transporting some files on which i need to keep attributes, acls, and alternate data streams intact.
I can not simply use directly 7z to create the wim, as the compression is not as strong as if i use dism to create the wim, then dism export using compress with recovery option into another wim to further reduce the size and finally 7z to compress it even stronger and having the split option.

Now the result are multiple 7z files (.7z001, .7z002, .7z003) that contain the wim.

The 7z file manager can transparently browse into the 7z archive and browse into the wim contained in the 7z archive perfectly without uncompressing the 7z archive at first.

What i need now is an automated solution to list the contents of the wim file inside the 7z without first uncompressing the 7z archive. Based on the output of the list command i then would need to extract only certain files from the wim, again without extracting the 7z archive first.

Since the 7z File manager can do that i belief there must be technically a way that the comand line version for listing and extracting can do just the same thing, right?
I probably just miss the right parameters to do so.

Can you help me out please?

Kind Regards,
Robin

[Igor Pavlov]

7-Zip uses temp file in that case.

[Robin Seeländer]

So then this is definite. Not transparent accessing possible at all.
Well then maybe i can get rid of the wim file if 7zip could one day have an option to keep attributes, ACLs and AlternateDataStreams in a LZMA2 compressed 7z file. Will there possibly be hope for that?