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Convert Advanced SubStation Alpha to EBU STL

Convert Advanced SubStation Alpha to EBU STL

/ass-to-stl

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About Advanced SubStation Alpha to EBU STL Conversion

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

    Key Differences Between Advanced SubStation Alpha and EBU STL

    • Format Structure: Advanced SubStation Alpha uses a multi-section format with styling and events while EBU STL uses a professional broadcast format with header metadata
    • Styling Support: Advanced SubStation Alpha offers advanced styling and animation features while EBU STL includes broadcast-standard formatting
    • Software Compatibility: Advanced SubStation Alpha is primarily used with undefined, undefined, undefined, while EBU STL is commonly used with undefined, undefined, undefined
    • Use Cases: Advanced SubStation Alpha is typically used for anime and complex styled subtitles, while EBU STL is preferred for broadcast television

Format Structure Examples

Advanced SubStation Alpha Format Example

[Script Info]
Title: Example ASS File
ScriptType: v4.00+

[V4+ Styles]
Format: Name, Fontname, Fontsize, PrimaryColour, SecondaryColour, OutlineColour, BackColour, Bold, Italic, Underline, StrikeOut, ScaleX, ScaleY, Spacing, Angle, BorderStyle, Outline, Shadow, Alignment, MarginL, MarginR, MarginV, Encoding
Style: Default,Arial,20,&H00FFFFFF,&H000000FF,&H00000000,&H00000000,0,0,0,0,100,100,0,0,1,2,2,2,10,10,10,1

[Events]
Format: Layer, Start, End, Style, Name, MarginL, MarginR, MarginV, Effect, Text
Dialogue: 0,0:00:01.00,0:00:04.00,Default,,0,0,0,,First line of subtitle text\NSecond line of subtitle text
Dialogue: 0,0:00:05.00,0:00:08.00,Default,,0,0,0,,Next subtitle block

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

  • Timing information and synchronization
  • Text content and line breaks
  • Basic text formatting
  • Character encoding
  • Language identification

What's Lost in Conversion

  • Broadcast-specific features
  • Professional metadata
  • Teletext compatibility

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Compatible Software

Advanced SubStation Alpha can be opened with:

EBU STL can be opened with:

Conversion Features with Checksub

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

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