.pak file extractor
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Premise: today I started trying to understand how to do it. LogPakFile: Display: Unreal pak executed in 0.002028 secondsĬ:\Program Files\Epic Games\UE_4.26\Engine\Binaries\Win64> LogPakFile: Display: Using command line for crypto configuration UnrealPak.exe C:\Users\Utente\OneDrive\Desktop\provaPAK\TS2Prototype-TaurusSound.pak -Extract C:\Temp If you find this information helpful in a project you're working on, please give credit where credit is due.C:\Program Files\Epic Games\UE_4.26\Engine\Binaries\Win64>.
.PAK FILE EXTRACTOR ARCHIVE
This archive format was reverse engineered by TheAlmightyGuru. Open ExportFolder + "\" + FileName ( FileNo ) For Binary As # 2 For ByteNo = 0 To ( FileSize - 1 ) Put # 2, , FileData ( ByteNo ) Next ByteNo Close # 2 End If Next FileNo Print "Finished." Close # 1 Sleep Credits Seek 1, FileStart ( FileNo ) + 1 For ByteNo = 0 To ( FileSize - 1 ) Get # 1, , FileData ( ByteNo ) Next ByteNo ' Save the buffer to the export folder. ReDim As Byte FileData ( 0 To FileSize ) ' Load the file from the PAK into the buffer. If FileSize > 0 Then ' Create a buffer to store the next file. FileSize = LoF ( 1 ) - FileStart ( FileNo ) Else FileSize = FileStart ( FileNo + 1 ) - FileStart ( FileNo ) End If Print Using "#) File: \ \ Offset: #, Size: #," FileNo FileName ( FileNo ) FileStart ( FileNo ) FileSize ' Trap for version 3 PAK files. If FileNo = FileCount Then ' Trap for version 1 and 2 PAK files. FileName ( FileCount ) = "" Do Char = " " Get # 1, , Char If Asc ( Char ) 0 Then FileName ( FileCount ) = FileName ( FileCount ) + Char End If Loop While Asc ( Char ) 0 FileCount = FileCount + 1 End If End If Loop FileCount = FileCount - 1 MKDir ( ExportFolder ) For FileNo = 0 To FileCount ' Read the previous file from the PAK. If ( Position - 1 ) = FileStart ( 0 ) Then FileCount = FileCount + 1 Exit Do Else ' Read the file name until we hit a null. If FileStart ( FileCount ) = 0 Then Exit Do Else ' Trap for version 1 PAK files. Get # 1, , FileStart ( FileCount ) Position = Seek ( 1 ) ' Trap for version 2 and 3 PAK files. Dim As String PAKFile = "H:\DOS\DUNE2\sound.pak" Dim As String ExportFolder = "H:\DOS\DUNE2\dune" Open PAKFile For Binary As # 1 Dim As UInteger FileStart ( 1000 ) Dim As String FileName ( 1000 ) Dim As UInteger Position Dim As String Char Dim As UInteger FileCount = 0 Dim As UInteger FileNo Dim As ULong FileSize Dim As UInteger ByteNo ' Loop through the header. It has an additional empty file name with a file offset so you ' can easily determine the size of the last file rather than relying on the length of the file, like in version 2. ' Version 3 was first used in The Legend of Kyrandia 2.
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It's header ends when the file offset is zero (0x0000). The last file offset is the ' length of the file. To determine the ' end of the header, just wait until the file pointer equals the position of the first file. Version 1 was used only in Eye of the Beholder 1. ' There are three versions of the PAK file. ' This program will extract the files stored in a Westwood PAK file used in various games in the first half of the 1990s.
.PAK FILE EXTRACTOR CODE
This FreeBASIC code will extract all of the files from a version 1, 2, or 3 PAK file into the folder you specify. The following tools are able to work with files in this format.Ĭan open at least the Dune II type PAK files. This should be taken into account when dealing with version 1 PAK files.
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The game doesn't actually use the end offset in any way it has a table of file sizes hardcoded in the exe file, and relies on that to extract the files correctly. Note that while version 1 PAK files normally have the end offset set to the file size, about half of the PAK files in Eye of the Beholder 1 have it set to complete garbage. Because of this, version 2 PAK files cannot contain hidden files after the last file. Version 3 PAK files have an additional file offset with an empty file name (just a null) to determine the size of the last file and then feature an end of header flag (0x0000). Version 2 PAK files replace this offset with an end of header flag (0x0000), so the end of the last file must be inferred from the size of the file itself. Version 1 PAK files have a final file offset equal to the size of the file. Depending on the version, the header ends either when the file pointer equals the offset of the first file (version 1), or when you encounter a file offset of 0 (versions 2 and 3).įile's starting offset in the PAK archive.įile name (8.3 style), null terminated, variable width.Įach file's size must be calculated by subtracting it from the next file's offset. The header contains a list of files consisting of a 32-bit file offset and a null-terminating file name.