Many users often ask, “How can I convert .SRT to .SUP (PGS format for Blu-ray or AVCHD)? I know it’s possible, but what’s the best way to do it?” This question comes up frequently among those looking to add subtitles to their Blu-ray projects. Since Blu-ray discs require PGS (Presentation Graphic Stream) subtitles rather than standard text-based formats like SRT, a conversion is necessary. In this article, we’ll walk you through the process of converting SRT subtitles to PGS SUP files and show you how to create a Blu-ray with multiple subtitle tracks.

Part 1. What Are SRT Subtitles and PGS Subtitles (SUP)?

Before we jump into subtitle conversion and Blu-ray authoring, it’s important to understand the fundamental differences between the two subtitle formats involved.

SRT Subtitles – What Are They?

SRT (SubRip Subtitle) is a widely used subtitle format that stores subtitle text and timing information in a plain text format. Each entry includes:

• A sequence number
• A timestamp for when the subtitle appears and disappears
• The actual dialogue or subtitle line

Here’s an example of a simple SRT subtitle line:

Advantages of SRT:

• Easy to edit with any text editor
• Lightweight and universally compatible with media players
• Perfect for soft-subbed videos or online playback

However, Blu-ray discs do not support SRT subtitles. That’s where PGS comes in.

PGS Subtitles – What Are They?

PGS (Presentation Graphic Stream) subtitles, typically stored in .sup files, are the standard subtitle format used in Blu-ray and AVCHD discs. Unlike SRT:

• PGS subtitles are bitmap images, not text
• Each subtitle line is rendered as an image frame
• These images are then overlayed onto the video during playback

Advantages of PGS:

• Ensures consistent subtitle appearance across all Blu-ray players
• Supports styled text, positioning, and anti-aliasing effects
• Required format for professional Blu-ray authoring

To author a Blu-ray that’s playable on standalone Blu-ray players, you must convert SRT to SUP (PGS) format.

Part 2. Two Ways to Convert SRT Subtitles to Blu-ray PGS Subtitles (SUP)

To make your SRT subtitles compatible with Blu-ray, you’ll need to convert them into .sup PGS files using subtitle software.

Recommended Tools:

• Subtitle Edit – Free subtitle editor that supports export to Blu-ray SUP
• TsMuxer – Free cross-platform tool to convert SRT to Blu-ray SUP

Way 1: Convert SRT to SUP Using Subtitle Edit

Subtitle Edit is a powerful and free subtitle editing tool for Windows that allows users to create, modify, synchronize, and convert subtitle files. It supports over 200 subtitle formats, including the popular SRT and Blu-ray PGS (SUP) formats. With its user-friendly interface, Subtitle Edit offers waveform and spectrogram views to help fine-tune subtitle timing, making it ideal for syncing subtitles accurately with audio. It also includes translation tools, spell-check, and batch conversion features. One of its standout capabilities is exporting text-based subtitles (like SRT) to image-based Blu-ray SUP subtitles, making it an essential tool for Blu-ray authoring.

Step 1: Download and Install Subtitle Edit

Official website: https://www.nikse.dk/SubtitleEdit
Download the latest version from the official site, install it on your Windows PC, and launch the program to get started.

Step 2: Load the SRT File

Click File > Open to import your .srt subtitle file. If needed, you can also load a video file to preview and synchronize the subtitles with the audio and visuals.

Step 3: Export as Blu-ray SUP

Go to File > Export > Blu-ray SUP. Set the output resolution (typically 1920x1080 for Full HD Blu-ray), then customize the font, color, and subtitle positioning. Finally, click "Export all lines..." and choose a location to save the resulting .sup file.

Way 2: Convert SRT to SUP Using TsMuxer

TsMuxer is a free, lightweight tool designed for muxing and demuxing video, audio, and subtitle streams into formats like TS, M2TS, and Blu-ray ISO. It is ideal for creating Blu-ray and AVCHD structures from existing media files. TsMuxer supports a wide range of formats, including H.264, HEVC, AC3, DTS, TrueHD, and PGS subtitles (.sup). One of its key advantages is the ability to generate Blu-ray folders or ISO images without re-encoding, preserving the original video and audio quality. Additionally, its demuxing feature can help convert SRT subtitles to PGS subtitles

Step 1: Download and Install TsMuxer

You can download TsMuxer from the VideoHelp website: https://www.videohelp.com/software/tsMuxeR. It’s a lightweight, portable tool that doesn’t require installation—just unzip the downloaded file and run the executable to start using it right away.

Step 2: Load the SRT File

Click the "Add" button to open the srt subtitles.

Step 3: Export as Blu-ray SUP

In the output options, choose "Demux", then set the save location using the "Folder" option. Once everything is configured, click "Start demuxing" to begin exporting the .sup subtitle file.

Part 3. How to Create a Blu-ray with Multiple Subtitles

Yuhan Blu-ray Creator is a professional Blu-ray authoring software designed for users who want to create high-quality Blu-ray discs with ease. It supports a wide range of video formats, including MKV, MP4, M2TS, MOV, and more. One of its standout features is the ability to add multiple audio tracks and subtitle files, including SRT, ASS, and PGS (SUP) formats, making it ideal for creating multilingual Blu-rays. The software includes over 30 customizable menu templates and allows users to personalize menu backgrounds, button layouts, and navigation styles. It supports both Full HD (1080P) and HD (720P) output, with options for BD25 and BD50 disc types. Yuhan Blu-ray Creator also preserves advanced audio formats like DTS-HD, TrueHD, and Blu-ray PCM, and offers both pass-through and transcoding modes to suit different needs. Whether you're archiving movies or producing a professional Blu-ray, Yuhan Blu-ray Creator delivers exceptional flexibility and performance.

Key Features

• Supports nearly all video formats including M2TS, TS, WMV, MKV, MP4, MOV, and more.
• Automatic Chapter Import.
• Supports preserving high-quality audio: TrueHD, DTS HD Master, EAC3, Blu-ray PCM.
• Offers 30+ customizable Blu-ray menu templates.
• Supports multiple audio tracks, multiple subtitles and adding external subtitles.
• Output in a variety of Blu-ray frame rates, including 23.976fps, 24fps, 25fps, 29.97fps, 50fps, and 59.94fps.
• Available on both Windows and Mac.

How to Add Multiple Subtitles to Blu-ray with Yuhan Blu-ray Creator

Before we start, we need to download and install Yuhan Blu-ray Creator. If your computer is Windows, you can click the button on the left below to download it. If your computer is Mac, please click the button on the right below to download it.

Step 1: Add Media Files

After launching the software, go to the "Blu-ray" tab at the top to start creating a Blu-ray disc. Click the "Add Video" button to import video files. For each imported video, you can select your favorite audio track and subtitle. Yuhan Blu-ray Creator supports multiple audio tracks, multiple subtitles, and even external subtitle files. You can add subtitles in srt, ass, sup(pgs) formats.

Step 2: Disk Menu Settings

Click the "Select Menu" button to open the "Menu Settings" dialog box. Yuhan Blu-ray Creator includes over 30 built-in disc menu templates. You can choose your preferred template from the panel on the right and customize it to your liking—for example, by setting a unique background image and music for each menu page, and rearranging the layout by dragging menu items to new positions.

Step 3: Output Settings

You can save your Blu-ray project as a BDMV folder, an ISO image, or burn it directly to a disc. Additionally, you can customize settings such as the disc label, default audio track, default subtitles, and more to suit your preferences.

Step 4: Start authoring

Click the "Start" button, and Yuhan Blu-ray Creator will begin the process. 

Part 4. Conclusion

Creating a Blu-ray with multiple subtitles requires converting your subtitle files into the PGS (SUP) format, as Blu-ray does not support text-based formats like SRT. Thankfully, free tools like Subtitle Edit and TsMuxer make this conversion easy. Once you have your .sup files ready, Yuhan Blu-ray Creator is the ideal tool to compile them into a professional-grade Blu-ray disc.

With support for multiple subtitle and audio tracks, custom menus, and high-resolution output, Yuhan Blu-ray Creator simplifies the process for both beginners and professionals. Follow this guide step by step, and you’ll be able to create multi-subtitle Blu-ray discs with ease and precision.

If you want to learn more about Yuhan Blu-ray Creator, please click: https://yuhanmedia.com/bd-creator

If you want to download and try it for free, please click the button below to download it.