A script for decoding Wallpaper Engine scene.pkg file.

main.py

#!/bin/python3

# From https://wetranslate.thiscould.work/scene.pkg/ and 
# Exactly from https://github.com/redpfire/we

import io
import zipfile
class File:
    def __init__(self,content:bytes):
        self.content = content
        self.offset = 0
    def readInt(self):
        num = int.from_bytes(self.content[self.offset:self.offset+4],byteorder="little")
        self.offset += 4
        return num
    def readStr(self):
        len = self.readInt()
        str = self.content[self.offset:self.offset+len].decode()
        self.offset += len
        return str
    def readFileInfo(self):
        name = self.readStr()
        offset = self.readInt()
        len = self.readInt()
        return {
            "name":name,
            "offset":offset,
            "length":len
        }
    def readBinary(self,offset,length):
        return self.content[self.offset+offset:self.offset+offset+length]

class PkgReaderV1:
    def __init__(self,content:bytes):
        self.content = File(content)
        self.version = self.get_version()
        self.fileCount = self.get_file_count()
        self.files = []
        self.get_file_info()
        self.get_file_content()
        self.zipfile = self.generate_zip()
    
    def get_version(self):
        return self.content.readStr()
    def get_file_count(self):
        return self.content.readInt()
    def get_file_info(self):
        for _ in range(self.fileCount):
            self.files.append(self.content.readFileInfo())
    def get_file_content(self):
        for file in self.files:
            file["content"]  = self.content.readBinary(file["offset"],file["length"])
    def generate_zip(self):
        zip_data = io.BytesIO()
        with zipfile.ZipFile(zip_data,"w") as f:
            for file in self.files:
                f.writestr(file["name"],file["content"])
        return zip_data
    def save(self):
        with open("scene.zip","wb") as f:
            f.write(self.zipfile.getvalue())


if __name__ == "__main__":
    with open("scene.pkg","rb") as f:
        fileContent = f.read()

    pkg = PkgReaderV1(fileContent)
    pkg.save()