PBPSharp is a managed, read-only C# library for reading PlayStation Portable PBP (EBOOT.PBP) containers and extracting the PlayStation disc images they carry. It handles both single-disc and multi-disc PBPs, parses the embedded PARAM.SFO metadata, decodes the PSAR ISO block index, and writes the extracted disc as a BIN file with a matching CUE sheet.

The library is the PBP extraction engine used by Batch Convert to CHD, where it serves as an intermediate step before converting PBP discs to CHD with chdman or CHDSharp.

• Repository: https://github.com/purelogiccode/BatchConvertToCHD
• Package: https://www.nuget.org/packages/PBPSharp

• Features
• Requirements
• Installation
• Quick start
• Usage examples
  • Read the metadata of a PBP
  • Extract a single-disc PBP to BIN/CUE
  • Extract every disc of a multi-disc PBP
  • Extract to a stream with progress and cancellation
  • Open a PBP from a stream
  • Generate a CUE sheet from the disc TOC
  • Read raw ISO blocks
  • Enumerate all SFO metadata entries
• Error handling
• API reference
  • PbpFile
  • PbpDiscInfo
  • CueSheetWriter
  • Models
• Supported PBP variants
• How it works
• Building from source
• License

• Single-disc and multi-disc PBP support — PSISOIMG0000 containers open as one disc, PSTITLEIMG000000 containers expose every disc found in the multi-disc position table (up to 5 discs).
• SFO metadata parsing — reads PARAM.SFO entries (TITLE, DISC_ID, CATEGORY, BOOTABLE, REGION, and any custom key) as UTF-8 strings or 32-bit integers, with well-known keys exposed through SfoData.Keys.
• Disc ID and TOC parsing — reads the PSAR game ID (for example SCUS94163) and the full track table, including audio tracks, with best-effort tolerance for malformed data.
• ISO extraction with CUE generation — ExtractToBinCue writes the disc as a BIN file and generates a matching CUE sheet, including INDEX 00 positions for audio tracks.
• Stream-friendly — extract to any writable Stream, or open a PBP from a Stream you own, so it works with archives, network streams, and in-memory data.
• Progress and cancellation — every long-running extraction accepts a byte-progress callback and a CancellationToken.
• Authoring-tool compatibility — reads PSAR block indexes written by popstation, PSX2PSP, iPoPS and pop-fe (both the 16-bit and 32-bit index layouts, stored/uncompressed blocks, and zlib-wrapped or raw-deflate blocks).
• No native dependencies — pure managed code, cross-platform, read-only by design.

The package contains a separate assembly for each target framework, so the correct build is selected automatically by NuGet.

Read-only: PBPSharp can open, inspect and extract PBP files. It cannot create, modify or repack them.

dotnet add package PBPSharp

or with the Package Manager console:

Install-Package PBPSharp

using PBPSharp;
using PBPSharp.Models;

var error = PbpFile.Open(@"C:\Games\EBOOT.PBP", out var pbp);
if (error != PbpError.None || pbp is null)
{
    Console.Error.WriteLine($"Could not open the PBP: {error}");
    return;
}

using (pbp)
{
    Console.WriteLine($"{pbp.Title} ({pbp.DiscId}) - {pbp.Discs.Count} disc(s)");

    var disc = pbp.Discs[0];
    var result = disc.ExtractToBinCue(@"C:\Games\Game.bin");
    Console.WriteLine(result == PbpError.None ? "Extracted." : $"Failed: {result}");
}

PbpFile.Open parses the container, the PARAM.SFO metadata and every disc up front, so the overview properties are available without touching the disc payload.

using PBPSharp;
using PBPSharp.Models;

var error = PbpFile.Open(pbpPath, out var pbp);
if (error != PbpError.None || pbp is null)
{
    Console.Error.WriteLine($"Could not open '{pbpPath}': {error}");
    return;
}

using (pbp)
{
    Console.WriteLine($"Title:     {pbp.Title ?? "(unknown)"}");
    Console.WriteLine($"Disc ID:   {pbp.DiscId ?? "(unknown)"}");
    Console.WriteLine($"Category:  {pbp.Category ?? "(unknown)"}");
    Console.WriteLine($"Multi-disc:{pbp.IsMultiDisc}");

    foreach (var disc in pbp.Discs)
    {
        Console.WriteLine($"  Disc {disc.Index}: {disc.DiscId}, " +
                          $"{disc.BlockCount} blocks, {disc.IsoSize:N0} bytes, " +
                          $"{disc.Toc.Count} tracks");
    }
}

A missing or corrupt PARAM.SFO does not fail the open. Metadata-dependent properties simply return null while the disc images remain extractable.

PbpDiscInfo.ExtractToBinCue writes the BIN file and, when no cue path is given, a CUE file next to it with the .cue extension.

using PBPSharp;
using PBPSharp.Models;

var error = PbpFile.Open(pbpPath, out var pbp);
if (error != PbpError.None || pbp is null)
{
    Console.Error.WriteLine($"Could not open '{pbpPath}': {error}");
    return;
}

using (pbp)
{
    var binPath = Path.ChangeExtension(pbpPath, ".bin"); // cue becomes .cue

    var result = pbp.Discs[0].ExtractToBinCue(binPath);
    if (result != PbpError.None)
    {
        Console.Error.WriteLine($"Extraction failed: {result}");
        return;
    }

    Console.WriteLine($"Extracted {pbp.Discs[0].IsoSize:N0} bytes to {binPath}");
}

Multi-disc PBPs expose one PbpDiscInfo per disc in PbpFile.Discs. The Index property is 1-based and can be used to build the usual - Disc N file names.

using PBPSharp;
using PBPSharp.Models;

var outputDir = @"D:\PS1 Rips";
Directory.CreateDirectory(outputDir);

var error = PbpFile.Open(pbpPath, out var pbp);
if (error != PbpError.None || pbp is null)
{
    Console.Error.WriteLine($"Could not open '{pbpPath}': {error}");
    return;
}

using (pbp)
{
    var baseName = Path.GetFileNameWithoutExtension(pbpPath);

    foreach (var disc in pbp.Discs)
    {
        var suffix = pbp.IsMultiDisc ? $" - Disc {disc.Index}" : string.Empty;
        var binPath = Path.Combine(outputDir, $"{baseName}{suffix}.bin");
        var cuePath = Path.ChangeExtension(binPath, ".cue");

        var result = disc.ExtractToBinCue(
            binPath,
            cuePath,
            bytesWritten =>
                Console.WriteLine($"Disc {disc.Index}: {bytesWritten:N0} bytes written")
        );

        Console.WriteLine(
            result == PbpError.None
                ? $"Disc {disc.Index} -> {binPath}"
                : $"Disc {disc.Index} failed: {result}"
        );
    }
}

PbpDiscInfo.ExtractTo writes the raw ISO sectors to any writable stream. The optional callback reports the total bytes written so far, and the cancellation token is checked before every block.

using PBPSharp;
using PBPSharp.Models;

using var source = File.OpenRead(pbpPath);
var error = PbpFile.Open(source, ownsStream: false, out var pbp);
if (error != PbpError.None || pbp is null)
{
    Console.Error.WriteLine($"Could not open '{pbpPath}': {error}");
    return;
}

using (pbp)
using (var cts = new CancellationTokenSource())
using (var output = File.Create(@"C:\Games\Game.iso"))
{
    var disc = pbp.Discs[0];

    disc.ExtractTo(
        output,
        bytesWritten =>
        {
            var percent = disc.IsoSize == 0 ? 100 : (bytesWritten * 100.0) / disc.IsoSize;
            Console.Write($"\r{percent,6:0.0}%");
        },
        cts.Token
    );

    Console.WriteLine();
}

ExtractTo can throw OperationCanceledException when the token is cancelled and InvalidDataException when a compressed block cannot be decoded. Use ExtractToBinCue when you prefer an error code over exceptions, or trim the partial output file yourself after a failure.

Both overloads require a readable, seekable stream. The ownsStream flag decides whether disposing the PbpFile also disposes the stream.

using PBPSharp;
using PBPSharp.Models;

using var file = File.OpenRead(pbpPath);
var error = PbpFile.Open(file, ownsStream: false, out var pbp);

if (error != PbpError.None || pbp is null)
{
    Console.Error.WriteLine($"Could not open the PBP: {error}");
    return;
}

using (pbp)
{
    Console.WriteLine(pbp.Title);
}

// The stream is still usable here because ownsStream was false.

You can also open a PBP that is already in memory:

var bytes = await File.ReadAllBytesAsync(pbpPath);
using var memory = new MemoryStream(bytes);
var error = PbpFile.Open(memory, ownsStream: false, out var pbp);

CueSheetWriter.GenerateCueSheet produces the CUE text without extracting anything, which is useful when the BIN already exists or when you need to inspect the track layout.

using PBPSharp;
using PBPSharp.Models;

var error = PbpFile.Open(pbpPath, out var pbp);
if (error != PbpError.None || pbp is null)
    return;

using (pbp)
{
    var disc = pbp.Discs[0];

    foreach (var track in disc.Toc)
    {
        Console.WriteLine(
            $"Track {track.TrackNo:00}: {track.TrackType}, " +
            $"{track.Minutes:00}:{track.Seconds:00}:{track.Frames:00}"
        );
    }

    var cue = CueSheetWriter.GenerateCueSheet("Game.bin", disc.Toc);
    File.WriteAllText(@"C:\Games\Game.cue", cue);
}

A generated CUE looks like this:

FILE "Game.bin" BINARY
  TRACK 01 MODE2/2352
    INDEX 01 00:02:00
  TRACK 02 AUDIO
    INDEX 00 04:11:72
    INDEX 01 04:12:72

For advanced scenarios you can read and decompress individual 16-sector blocks. Each block is up to 16 * PbpDiscInfo.IsoBlockSize bytes. The last block may be shorter; always use the returned bytesRead.

using PBPSharp;
using PBPSharp.Models;

var error = PbpFile.Open(pbpPath, out var pbp);
if (error != PbpError.None || pbp is null)
    return;

using (pbp)
{
    var disc = pbp.Discs[0];
    var buffer = new byte[16 * PbpDiscInfo.IsoBlockSize];

    for (var i = 0; i < disc.BlockCount; i++)
    {
        disc.ReadBlock(i, buffer, out var bytesRead);

        // Process buffer[0..bytesRead]
    }
}

SfoData.Entries contains every entry in file order, including keys that are not in the well-known list.

using PBPSharp;
using PBPSharp.Models;

var error = PbpFile.Open(pbpPath, out var pbp);
if (error != PbpError.None || pbp is null)
    return;

using (pbp)
{
    foreach (var entry in pbp.SfoData.Entries)
    {
        var type = entry.Format == 0x0404 ? "uint32" : "string";
        Console.WriteLine($"{entry.Key,-16} {type,-6} ({entry.Length,4} bytes) = {entry.Value}");
    }

    // Well-known keys are available as constants.
    var title = pbp.SfoData.GetString(SfoData.Keys.Title);
    var bootable = pbp.SfoData.GetUInt32(SfoData.Keys.Bootable);
}

PbpFile.Open and PbpDiscInfo.ExtractToBinCue return a PbpError value instead of throwing for data-related problems. Corrupt containers, unsupported PSAR headers, truncated downloads and decompression failures are all reported through the enum, which makes batch processing straightforward.

var error = PbpFile.Open(path, out var pbp);

switch (error)
{
    case PbpError.None:
        // pbp is ready to use
        break;
    case PbpError.FileNotFound:
        Console.Error.WriteLine("The file does not exist.");
        break;
    case PbpError.TruncatedPsar:
        Console.Error.WriteLine("The PBP looks truncated - re-download it.");
        break;
    case PbpError.InvalidPsarHeader:
        Console.Error.WriteLine("Not a PlayStation disc image (PSP app or unsupported PBP).");
        break;
    default:
        Console.Error.WriteLine($"Could not open the PBP: {error}");
        break;
}

Notes:

• ReadBlock throws ArgumentOutOfRangeException for an out-of-range blockIndex and InvalidDataException when the index entry is corrupt.
• ExtractTo propagates OperationCanceledException and InvalidDataException.
• ExtractToBinCue writes the BIN first. If extraction fails, a partial BIN file may remain; delete it if the returned error is not PbpError.None.
• NoIsoIndexException is what the PSAR parser throws internally when a valid disc container carries no ISO index. PbpFile.Open catches it and reports PbpError.TruncatedPsar.

All types live in the PBPSharp namespace; the model types live in PBPSharp.Models.

The entry point. Represents an opened PBP container and owns the underlying stream when it was opened from a path.

Represents one disc inside a PBP.

PBP files are produced by several authoring tools, and PBPSharp reads the layouts each of them writes:

• popstation / PSX2PSP / iPoPS — 32-bit ISO index size field, raw deflate blocks.
• pop-fe — official 16-bit index size field with a stored/uncompressed flag byte, uncompressed (stored) blocks when compression is disabled, zlib-wrapped deflate blocks, and multi-disc PSTITLEIMG headers with zeroed template fields.
• Incompressible blocks — deflate streams a few bytes larger than the raw 16-sector block are accepted.
• Truncated PBPs — a valid disc container with no ISO index is reported as PbpError.TruncatedPsar rather than a generic corruption error.
• PSP applications — PBPs whose PSAR is not a PlayStation disc image are reported as PbpError.InvalidPsarHeader and are skipped cleanly.

A PBP file starts with a 40-byte header whose magic is 0x50425000 ("\0PBP") and whose fields are file offsets to PARAM.SFO, the icon/picture/sound resources, DATA.PSP and DATA.PSAR. PBPSharp reads that header, parses the SFO (best effort), and then looks at the PSAR section:

1. PSISOIMG0000 marks a single-disc image; PSTITLEIMG000000 marks a multi-disc container whose disc positions are read from the table at PSAR+0x200.
2. Each disc has a game ID at PSAR+0x400, a TOC at PSAR+0x800, an ISO block index at PSAR+0x4000, and the ISO data at PSAR+0x100000.
3. Each 32-byte index entry gives the block offset, stored length and (in the pop-fe layout) a stored/uncompressed flag. Blocks are either copied verbatim or inflated from raw deflate, with a zlib-wrapped retry for tools that use zlib.
4. The total ISO size is derived from the sector count stored at bytes 104-107 of the second ISO block, matching the popstation reference implementation.

All offsets are computed with 64-bit math, so multi-gigabyte images cannot overflow.

The library lives in the Batch Convert to CHD repository under PBPSharp/.

git clone https://github.com/purelogiccode/BatchConvertToCHD.git
cd BatchConvertToCHD
dotnet build PBPSharp/PBPSharp.csproj -c Release
dotnet pack PBPSharp/PBPSharp.csproj -c Release -o artifacts

The test suite for the library lives in BatchConvertToCHD.Tests/:

dotnet test BatchConvertToCHD.Tests/BatchConvertToCHD.Tests.csproj -c Release --filter "FullyQualifiedName~Pbp"

PBPSharp is released under the MIT license.