TTML to EBU STL Converter

Convert TTML to EBU STL

Converting from TTML (TTML) to Spruce STL (STL) while maintaining timing accuracy and subtitle content.

About TTML to EBU STL Conversion

A quick guide to converting from TTML (.ttml) to EBU STL (.stl). Learn about format differences, what's preserved, and how to convert your subtitles.

Key Differences Between TTML and EBU STL

Format Structure: TTML uses an XML-based format with styling and layout sections while EBU STL uses a professional broadcast format with header metadata
Styling Support: TTML supports comprehensive XML-based styling while EBU STL includes broadcast-standard formatting
Software Compatibility: TTML is primarily used with undefined, undefined, undefined, while EBU STL is commonly used with undefined, undefined, undefined
Use Cases: TTML is typically used for professional streaming platforms, while EBU STL is preferred for broadcast television

Format Structure Examples

TTML Format Example

<?xml version="1.0" encoding="utf-8"?>
<tt xmlns="http://www.w3.org/ns/ttml" 
    xmlns:ttp="http://www.w3.org/ns/ttml#parameter" 
    xmlns:tts="http://www.w3.org/ns/ttml#styling" 
    xmlns:ttm="http://www.w3.org/ns/ttml#metadata" 
    xmlns:xml="http://www.w3.org/XML/1998/namespace" 
    ttp:timeBase="media" 
    ttp:frameRate="24" 
    xml:lang="en">
  <head>
    <metadata>
      <ttm:title>Sample TTML</ttm:title>
    </metadata>
    <styling>
      <style xml:id="s1" 
             tts:textAlign="center" 
             tts:fontFamily="Arial" 
             tts:fontSize="100%"/>
    </styling>
    <layout>
      <region xml:id="bottom" 
              tts:displayAlign="after" 
              tts:extent="80% 40%" 
              tts:origin="10% 50%"/>
      <region xml:id="top" 
              tts:displayAlign="before" 
              tts:extent="80% 40%" 
              tts:origin="10% 10%"/>
    </layout>
  </head>
  <body>
    <div>
      <p xml:id="subtitle1" begin="00:00:01.375" end="00:00:05.750" 
         style="s1" region="top">TOP SAMPLE TEXT</p>
      <p xml:id="subtitle2" begin="00:00:05.916" end="00:00:10.216" 
         style="s1" region="bottom">BOTTOM SAMPLE TEXT</p>
      <p xml:id="subtitle3" begin="00:00:10.418" end="00:00:15.083" 
         style="s1" region="bottom">He had a great story.</p>
      <p xml:id="subtitle4" begin="00:00:15.391" end="00:00:20.558" 
         style="s1" region="bottom">- Did he tell you what it was about?<br/>- He did</p>
      <p xml:id="subtitle5" begin="00:00:20.750" end="00:00:25.041" 
         style="s1" region="bottom">In 1992, a shipping container<br/>fell overboard</p>
    </div>
  </body>
</tt>

EBU STL Format Example

//EBU STL Subtitle File
$FontName       = Arial
$FontSize       = 30
$ColorIndex     = 1
$TapeNumber     = 1
$PageNumber     = 1
$TotalPages     = 1
$MaxRows        = 11
$TimeCodeFormat = 1

00:00:01:00,00:00:04:00
First line of subtitle text
Second line of subtitle text

00:00:05:00,00:00:08:00
Next subtitle block

What's Preserved in Conversion

Basic text content
Timing information
Font specifications
Basic positioning
Language information

What's Lost in Conversion

Advanced XML styling capabilities
Multiple region definitions
Complex metadata structures
Some positioning information

Compatible Software

TTML can be opened with:

EBU STL can be opened with:

Conversion Features with Checksub

Automatic TTML format detection
Precise timing conversion from TTML to EBU STL
Smart text formatting adaptation
Character encoding handling (UTF-8, Unicode)
Format-specific optimizations for EBU STL
Error checking and validation

Convert Your TTML File Now

Ready to convert your subtitles? Our converter maintains timing accuracy and proper formatting while ensuring the best possible compatibility with your target platform.

Convert to EBU STL