Looks like this specific .sav file has a particular encoding that i’m not able to understand.
Every other .sav file i’ve tried to decode always worked, but this one in particular seems tricky..

Codes i’ve tried to retreive all the data from it:

Pandas SPSS

import pandas as pd
import json

# Load the .sav file without specifying encoding
df = pd.read_spss('/home/seizou/KURO_PLAYER_PREFS.sav')

# Convert the DataFrame to JSON
json_data = df.to_json(orient='records', force_ascii=False)

# Save the JSON data to a file, ensuring UTF-8 encoding
with open('output_file.json', 'w', encoding='utf-8') as json_file:
    json_file.write(json_data)

Manual Decoding

import struct
import json
import os
import datetime

def decode_string(encoded_string):
    try:
        decoded_string = encoded_string.decode('utf-8', errors='replace')
        cleaned_string = ''.join(char if char.isprintable() else ' ' for char in decoded_string)
        return cleaned_string
    except UnicodeDecodeError as e:
        print(f"UnicodeDecodeError: {e}; data: {encoded_string[:50]}...")  # Log the error and part of the problematic data
        return "<UNDECODABLE BINARY DATA>"  # Placeholder for undecodable data

def determine_data_type_and_length(binary_data, offset):
    IDENTIFIER_TO_TYPE = {
        b'x01': ('integer', 4),
        b'x02': ('float', 4),
        b'x03': ('date', 8),
        b'x04': ('string', None)  # Assuming the length for strings is determined separately
    }

    identifier = binary_data[offset:offset+1]
    offset += 1

    if identifier in IDENTIFIER_TO_TYPE:
        data_type, length = IDENTIFIER_TO_TYPE[identifier]

        if data_type == 'string':
            # Assuming the length of the string is stored in the next 2 bytes
            length = struct.unpack_from('<H', binary_data, offset)[0]
            offset += 2
        return data_type, length, offset
    else:
        print(f"Skipping unknown identifier {identifier} at offset {offset-1}.")
        # Example: Skip a predefined number of bytes for unknown identifiers
        # This needs to be adjusted based on how you can determine the length to skip
        skip_length = 4  # Placeholder value
        offset += skip_length
        return None, None, offset

def read_sav_file(file_path):
    data = []
    with open(file_path, 'rb') as file:
        binary_data = file.read()

    offset = 0
    
    while offset < len(binary_data):
        data_item = {}
        data_type, data_length, offset = determine_data_type_and_length(binary_data, offset)
        if data_type is None:
            continue  # Skip processing this data and move to the next
        
        data_item['type'] = data_type
        
        if data_type == 'integer':
            value = struct.unpack_from('<i', binary_data, offset)[0]
            offset += 4
        elif data_type == 'float':
            value = struct.unpack_from('<f', binary_data, offset)[0]
            offset += 4
        elif data_type == 'date':
            unix_timestamp = struct.unpack_from('<Q', binary_data, offset)[0]
            try:
                value = datetime.datetime.fromtimestamp(unix_timestamp, datetime.timezone.utc).strftime('%Y-%m-%d %H:%M:%S')
            except OverflowError:
                value = "Invalid Date"
            offset += 8
        elif data_type == 'string':
            string_length = struct.unpack_from('<H', binary_data, offset)[0]
            offset += 2
            value = decode_string(binary_data[offset:offset+string_length])
            offset += string_length
        else:
            value = None
            offset += data_length  # Adjust based on actual logic
        
        data_item['value'] = value
        data.append(data_item)

    return data


def convert_to_json(sav_data, output_file_path):
    structured_data = {
        "metadata": {
            "source_file": os.path.basename(output_file_path),
            "total_entries": len(sav_data) // 2,  # Correctly calculating total entries
            "extraction_date": datetime.datetime.now().strftime("%Y-%m-%d %H:%M:%S")
        },
        "entries": []
    }
    
    # Iterate through sav_data in steps of 2
    for i in range(0, len(sav_data), 2):
        integer_entry = sav_data[i]['value'] if i < len(sav_data) and sav_data[i]['type'] == 'integer' else None
        string_entry = sav_data[i+1]['value'] if i+1 < len(sav_data) and sav_data[i+1]['type'] == 'string' else None
        
        structured_data["entries"].append({
            "integer": integer_entry,
            "string": string_entry
        })
    
    with open(output_file_path, 'w', encoding='utf-8') as json_file:
        json.dump(structured_data, json_file, indent=4)
        
def main():
    # Path to .sav file
    sav_file_path = '/path/to/sav_file.sav'
    
    # Check if the file exists
    if not os.path.exists(sav_file_path):
        print(f"File {sav_file_path} not found!")
        return
    
    # Path to .sav file to read
    sav_data = read_sav_file(sav_file_path)

    # Path where to save the JSON
    json_file_path = '/path/to/output_file.json'

    # Converts and save as JSON
    convert_to_json(sav_data, json_file_path)

    print(f"JSON Saved at: {json_file_path}")

if __name__ == "__main__":
    main()

Nothing worked so far, the best output i’ve gotten was:

{
    "metadata": {
        "source_file": "output_file.json",
        "total_entries": 49,
        "extraction_date": "2024-06-16 10:07:19"
    },
    "entries": [
        {
            "integer": 1396790855,
            "string": "  "
        },
        {
            "integer": 522,
            "string": "    "
        },
        {
            "integer": 107041437,
            "string": "  ++UE4+Release-4.2"
        },
        {
            "integer": 196662,
            "string": ""
        },
        {
            "integer": 58,
            "string": null
        },
        {
            "integer": -1180047784,
            "string": null
        },
        {
            "integer": null,
            "string": null
        },
        {
            "integer": -80436955,
            "string": null
        },
        {
            "integer": null,
            "string": null
        },
        {
            "integer": 1396724469,
            "string": null
        },
        {
            "integer": null,
            "string": null
        },
        {
            "integer": null,
            "string": null
        },
        {
            "integer": null,
            "string": null
        },
        {
            "integer": 529092365,
            "string": null
        },
        {
            "integer": 10,
            "string": null
        },
        {
            "integer": -1553166714,
            "string": null
        },
        {
            "integer": null,
            "string": null
        },
        {
            "integer": -2064644380,
            "string": null
        },
        {
            "integer": null,
            "string": null
        },
        {
            "integer": -1573791221,
            "string": null
        },
        {
            "integer": null,
            "string": null
        },
        {
            "integer": 350176176,
            "string": null
        },
        {
            "integer": null,
            "string": null
        },
        {
            "integer": -600192975,
            "string": null
        },
        {
            "integer": 4070542,
            "string": ""
        },
        {
            "integer": -266652928,
            "string": null
        },
        {
            "integer": -1185242439,
            "string": null
        },
        {
            "integer": 1296293990,
            "string": null
        },
        {
            "integer": 105,
            "string": null
        },
        {
            "integer": 2094599304,
            "string": null
        },
        {
            "integer": null,
            "string": null
        },
        {
            "integer": -1731039156,
            "string": null
        },
        {
            "integer": 402653184,
            "string": null
        },
        {
            "integer": -2070027676,
            "string": null
        },
        {
            "integer": -20799150,
            "string": null
        },
        {
            "integer": 22224375,
            "string": ""
        },
        {
            "integer": -1398549504,
            "string": null
        },
        {
            "integer": 1116718519,
            "string": "   ufffduufffd)'Fufffdufffdvufffd ufffdufffdufffd,#    ]ufffdCufffdGIufffd ufffd>sufffd ufffdufffdufffd    ufffdl&kufffdKufffd ufffdufffd ufffd ufffdB     a=ufffd ufffdG?ufffdufffd'ufffdufffdIA     ufffd  `ufffdOdufffdufffdufffd ufffdufffdufffdufffd +   hc ufffdXL#kp 9ufffdufffd^&     u05bcufffdufffdX OIufffd !u2228ufffd<    ufffdu042eufffdoAufffdufffd ufffddufffdufffdufffd&ufffd      O ufffdEu01b4ufffd.?ufffd}ufffdufffdufffd    ufffdJufffd5l@Xufffdufffd  ufffd|$ ufffd(   nufffdufffdufffdufffdB ufffd\!SufffdufffdDufffd      ufffdufffdufffdufffdsBufffdufffdNufffd ufffdufffdu    6ufffdufffddufffdB ufffdufffdrufffdufffdNufffdufffdufffd    ufffdufffd}iufffdAOufffdufffdQJufffd(ufffdufffdufffd    B^ufffdufffdFMufffd$ufffdufffd ufffdy dufffd    'ufffd oufffdH ufffdufffdufffdufffdufffdufffd  ufffd    ufffd q:Iufffdufffd2ufffdufffdufffd ufffd8     P2hTufffdHufffdufffdufffdufffdu020bufffdufffdufffdufffd     M CpITqiufffdiufffdu5c10ufffd    ufffd2ufffdufffd LufffdS%^jufffdufffdufffd2     ufffdufffd#XNufffdLRufffdaufffdufffdufffdSufffd    ufffdbufffd:Nufffdufffd ufffdufffdufffdufffdufffd$ufffd    ufffdufffdufffd. Mufffd ufffdufffd6ufffdu06a5ufffd3    O5ufffdP/IufffdufffdufffdufffdIufffd c<     @ufffdVJufffd ufffd ~4u04d2ufffdju0272     Jufffdu05d7FXufffd ufffdufffdufffdF}H    ufffdufffdyU L:ufffd{ ufffdufffd/ufffdac    Rufffd/a @Su0691O ufffd|ufffdufffdufffd    6z#ufffdufffdAufffdufffdufffd ufffdufffdufffd hX    u?NufffdIKufffdp ufffdu05a4u0736~<    ufffdHufffd hL./ufffdSu0409- ufffdufffd    ufffd hufffdufffdKufffdYufffd ufffdufffd=Dufffds     ufffdPufffd N ufffd ufffdu033bufffd ufffdW    ufffdQufffdufffdufffd ufffdEufffd" ufffdVufffdx    2   /Script/KuroRenderingRuntimeBPPlugin.KuroSaveGame     StringMap     MapProperty ?         "
        },
        {
            "integer": 1951596544,
            "string": null
        },
        {
            "integer": 786553,
            "string": ""
        },
        {
            "integer": 1349678163,
            "string": null
        },
        {
            "integer": 0,
            "string": null
        },
        {
            "integer": null,
            "string": null
        },
        {
            "integer": 1769366852,
            "string": null
        },
        {
            "integer": null,
            "string": null
        },
        {
            "integer": 875771193,
            "string": null
        },
        {
            "integer": 875906370,
            "string": null
        },
        {
            "integer": 3290435,
            "string": "  Non"
        },
        {
            "integer": 101,
            "string": ""
        }
    ]
}

which to me seems just a corrupted conversion.
any help is appreciated, i’ll give you guys a link to download the .sav from yourself:
https://zoux.net/static/KURO_PLAYER_PREFS.sav