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Convert EBU STL to Advanced SubStation Alpha

Convert EBU STL to Advanced SubStation Alpha

Converting from Spruce STL (STL) to Advanced SubStation Alpha (ASS) while maintaining timing accuracy and subtitle content.

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About EBU STL to Advanced SubStation Alpha Conversion

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

    Key Differences Between EBU STL and Advanced SubStation Alpha

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

Format Structure Examples

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

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

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

  • Advanced styling and effects
  • Multiple layers
  • Custom scripting features

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Compatible Software

EBU STL can be opened with:

Advanced SubStation Alpha can be opened with:

Conversion Features with Checksub

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

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