How do I extract bsp files?

There are maps I want to extract sounds from (These are custom maps, and custom sounds)
and I cannot do it, it just gives me this error : Compression format 0x0e not supported
using gcfscape ^
What do I do?

 

I think it happens to everyone (At least happens to me too) but it has an easy solution, instead of trying to exctract a custom texture or sound just extract the .zip and from there you can exctract everything fine.

 

The maps are repacked, you've got to unpack them by running bspzip.exe (/team fortress 2/bin/ folder) with -repack /path to map/map.bsp. Once you do that, you're able to extract the custom content

 

I never tried that tbh, but for me worked the other way but is still interesting to know other ways.