VobSub utilities

Some utilities to convert existing subtitles in the DVD subtitles format VobSub (.sub/.idx).

SRT to VobSub conversion

Linux script to convert .srt files to VobSub (.sub/.idx).

sudo apt install dvdauthor mencoder
chmod +x srt2vobsub.sh
./srt2vobsub.sh

BDSup2Sub++Qt6

This is a Qt6-based subtitle conversion tool for image-based stream formats. Notably, this software allows you to convert subtitle files for Blu-ray (.sup) and DVD (.sub/.idx).

It is a modernized fork of BDSup2Sub++ (last release in 2013), which itself is a fork of the original, Java-based, BDSup2Sub codebase (also last release in 2013). These projects are hard to build and run on modern systems, because of ancient dependencies. I've tried to change the original code (from @amichaelt) as little as possible. The primary change is upgrading to Qt6.

Installation & Downloads

Pre-compiled binaries are automatically built and available on the Releases page for multiple platforms:

• Linux (AppImage): A fully self-contained application. Simply download, make it executable if it isn't already (chmod +x), and run. No external dependencies required.
• Linux (Tarball): A standard compiled binary. Note: This build requires the system to have the Qt6 Widgets library installed to run.
• Windows (.zip): A portable archive containing the bdsup2sub++.exe binary and all required Qt dependencies bundled together.
• macOS (.dmg): A standard macOS disk image containing the application bundle.

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Linux Build Instructions

This repository is intended to build on Linux with Qt6 and modern C++.

Dependencies

Install Qt6 development packages and build tools for your distribution. For Debian/Ubuntu-based systems, use:

sudo apt update
sudo apt install build-essential qt6-base-dev qt6-base-dev-tools qt6-tools-dev

On Ubuntu, the qt6-qmake package is not provided; use the qmake6 executable from the qt6-base-dev-tools package.

Build steps

From the repository root:

cd /path/to/BDSup2SubPlusPlus
mkdir -p build
cd build
qmake6 ../src/bdsup2sub++.pro
make

Run

After a successful build:

./bdsup2sub++

For headless or CI environments, run the command-line conversion with Qt's offscreen platform backend:

QT_QPA_PLATFORM=offscreen ./bdsup2sub++ --no-verbose -o output.sub input.sup

This is useful for converting a SUP file to SUB/IDX without launching the GUI.

Tests

A QtTest-based unit test project is available in tests/.

Build and run the tests with:

cd tests
qmake6 bdsup2subplusplus_tests.pro
make
./bdsup2subplusplus_tests