STL Subtitle Generator

Generate .stl subtitles for your videos

Choose a file

File Limits: size 20 MB and duration 8 mins OR Sign up

Output Files

Adjust Duration

Specify the start and end points of the transcription.

Audio Language:

Specifying the audio language improves accuracy.

Multilingual Transcription

Enable this option if your audio file contains more than one language.

Automatic Translation

Premium Option : Enables translation of your transcriptions and subtitles into multiple languages.

Speaker Identification

Business Option : Automatically detects and labels speakers in your transcripts as 'Speaker 1', 'Speaker 2', …

Note: This option is currently limited to the first 2 hours of audio.

Number of speakers (optional)

Specify the number of people for better results. If unsure, leave blank for automatic detection.

What is the EBU STL format?

The STL subtitle format (EBU STL - Subtitle Data Exchange) is a format standardized by the European Broadcasting Union (EBU) and widely used in the field of television and post-production in Europe.

Here are some key points about the EBU STL format:

File extension: EBU Subtitles files use the extension .stl
Structure: An STL file is a binary file (not readable text) structured according to the EBU Tech 3264-E standard. It contains two main sections:
GSI (General Subtitle Information Block) - a header containing metadata about the file, such as the language, program title, creation date, start timecode, etc.
TTI (Text and Timing Information Blocks) - a series of blocks describing each subtitle with: a subtitle identifier, the appearance and disappearance timecode (in the format HH:MM:SS:FF), the subtitle text, and any positioning or style information.
Specificity: The STL format is designed for professional use. It allows for the management of multiple character sets (Latin, Cyrillic, Greek…), precise frame-by-frame synchronization, basic formatting (italic, colors, on-screen position), and the management of multiple languages in a single project.
Compatibility: The EBU STL format is recognized by most European television broadcasting systems and by many professional subtitling software (such as EZTitles, Belle Nuit Subtitler, or Subtitle Edit). This format is used in television, film, and broadcast production when precision, inter-system compatibility, and multilingual management are essential.

How to generate EBU subtitles?

Upload your file

Simply upload your audio or video file to our platform. Transcri accepts a wide range of formats.

Automatic transcription and synchronization

Our Artificial Intelligence generates the transcription of your content, then automatically adjusts the timing for perfect alignment with your video.

Download your STL file

Your subtitles are formatted in a professionally quality .stl file. All that's left is to download it, ready to be integrated into your video.

Subtitle accuracy guaranteed

Our Online subtitle generator ensures accurate transcription and impeccable synchronization, essential for the STL format.

EBU STL customization and editing

Our online editor allows you to easily check and adjust the text of your subtitles to perfectly match your content before integration.

Integration of STL subtitles

Easily integrate your STL files into compatible editing software to enhance the accessibility and engagement of your content.

Translation of STL subtitles

Translate your STL subtitles into more than 50 languages with our automatic translation feature to expand your audience internationally.

Other available subtitle formats

In addition to the STL format, you can download your subtitles in other popular formats:

SRT subtitle SMI subtitle DFXP subtitle LRC subtitle ASS subtitle VTT subtitle SBV subtitle SCC subtitle TTML subtitle SUB (MicroDVD) subtitle SUB (SubViewer) subtitle

Frequently Asked Questions

How to create an STL file?

We recommend the automatic method via AI tools like Transcri to ensure accuracy. The manual method requires adhering to strict hexadecimal formatting in a text editor, in addition to the transcription phase.

Can I use Transcri for my professional projects?

Yes, our service is ideal for personal, professional, and commercial projects, ensuring that your videos are accessible and compliant with professional subtitling standards.

What are the compatible video formats?

Our tool supports the most common video formats, including MP4, AVI, MOV, MKV, and FLV. You can work directly with the majority of files without prior conversion needed.

How many languages are supported?

We support more than 50 languages for transcription. Our translation tool allows you to translate these STL subtitles into any language.

How to open an STL file?

An STL file is a text file. You can open it with any text editor to read or modify it. To use it, it must then be imported into your player or video software.

How to integrate STL subtitles into my video?

For integration, simply import the STL file into your professional video editing software or on the broadcasting platform via the subtitle management tool.

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