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Convert SAMI to DFXP

Convert SAMI to DFXP

Converting from SAMI (SMI) to DFXP (DFXP) while maintaining timing accuracy and subtitle content.

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About SAMI to DFXP Conversion

A quick guide to converting from SAMI (.sami) to DFXP (.dfxp). Learn about format differences, what's preserved, and how to convert your subtitles.

    Key Differences Between SAMI and DFXP

    • Format Structure: SAMI uses a standard subtitle structure while DFXP uses an XML-based distribution format
    • Styling Support: SAMI has standard formatting capabilities while DFXP offers XML-based styling features
    • Software Compatibility: SAMI is primarily used with undefined, undefined, undefined, while DFXP is commonly used with undefined, undefined, undefined
    • Use Cases: SAMI is typically used for standard subtitle applications, while DFXP is preferred for online video distribution

Format Structure Examples

SAMI Format Example

<SAMI>
<HEAD>
  <TITLE>Sample SAMI File</TITLE>
  <STYLE TYPE="text/css">
    <!--
    P { font-family: Arial; font-weight: normal; color: white; background-color: black; }
    .ENCC { Name: English; lang: en-US; SAMIType: CC; }
    -->
  </STYLE>
</HEAD>
<BODY>
  <SYNC Start=1000>
    <P Class=ENCC>First line of subtitle text<BR>Second line of subtitle text</P>
  </SYNC>
  <SYNC Start=5000>
    <P Class=ENCC>Next subtitle block</P>
  </SYNC>
  <SYNC Start=8000>
    <P Class=ENCC>&nbsp;</P>
  </SYNC>
</BODY>
</SAMI>

DFXP Format Example

<?xml version="1.0" encoding="utf-8"?>
<tt xml:lang="en" xmlns="http://www.w3.org/ns/ttml"
    xmlns:tts="http://www.w3.org/ns/ttml#styling"
    xmlns:ttm="http://www.w3.org/ns/ttml#metadata">
  <head>
    <styling>
      <style xml:id="defaultCaption" 
             tts:fontSize="10" 
             tts:fontFamily="SansSerif"
             tts:fontWeight="normal" 
             tts:fontStyle="normal"
             tts:textDecoration="none" 
             tts:color="white"
             tts:backgroundColor="black" />
    </styling>
  </head>
  <body>
    <div style="defaultCaption" xml:lang="en">
      <p begin="00:00:03.400" end="00:00:06.177">In this lesson, we're going to<br />be talking about finance.</p>
      <p begin="00:00:06.177" end="00:00:10.009">One of the most important aspects<br />of finance is interest.</p>
    </div>
  </body>
</tt>

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

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    Compatible Software

    SAMI can be opened with:

    DFXP can be opened with:

    Conversion Features with Checksub

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

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