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Convert SubViewer to EBU STL

Convert SubViewer to EBU STL

/subviewer-to-stl

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About SubViewer to EBU STL Conversion

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

    Key Differences Between SubViewer and EBU STL

    • Format Structure: SubViewer uses a header-based format with simple timing while EBU STL uses a professional broadcast format with header metadata
    • Styling Support: SubViewer provides basic styling through header definitions while EBU STL includes broadcast-standard formatting
    • Software Compatibility: SubViewer is primarily used with undefined, undefined, undefined, while EBU STL is commonly used with undefined, undefined, undefined
    • Use Cases: SubViewer is typically used for legacy video players, while EBU STL is preferred for broadcast television

Format Structure Examples

SubViewer Format Example

[INFORMATION]
[TITLE]Example SubViewer File
[AUTHOR]Subtitle Editor
[SOURCE]Movie Title
[PRG]Subtitle Editor
[FILEPATH]movie_subtitles.sub
[DELAY]0
[CD TRACK]0
[COMMENT]Example subtitle file
[END INFORMATION]
[SUBTITLE]
[COLF]&HFFFFFF,[STYLE]bd,[SIZE]18,[FONT]Arial

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

00:00:10.00,00:00:15.00
This is another subtitle|With multiple lines of text

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

SubViewer can be opened with:

EBU STL can be opened with:

Conversion Features with Checksub

  • Automatic SubViewer format detection
  • Precise timing conversion from SubViewer 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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