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{{Notability|date=February 2023}}
{{Infobox file format
{{Infobox file format
| name = USF
| name = USF
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| mime = text/xml
| mime = text/xml
| released = {{start date and age|2002|11|10}}<ref>{{cite web |url=http://www.titlevision.dk/usf.htm|title=USF FORMAT|accessdate={{TODAY}} }}</ref>
| released = {{start date and age|2002|11|10}}<ref>{{cite web |url=http://www.titlevision.dk/usf.htm|title=USF FORMAT|accessdate={{TODAY}} }}</ref>
| latest_release_version = 1.1
| latest_release_date = {{start date and age|2010|11|28}}
| latest_release_date = {{start date and age|2010|11|28}}
| genre = [[Timed text]]
| genre = [[Timed text]]
| url = http://www.titlevision.dk/usf.htm
| url = http://www.titlevision.dk/usf.htm
| open = Yes
| free = Proprietary
}}
}}
'''Universal Subtitle Format (USF)''' was a CoreCodec project that attempted to create a clean, documented, powerful and easy to use subtitle file format. It is based on [[XML]] for flexibility, unicode support, hierarchical system, and ease of administration.
'''Universal Subtitle Format''' ('''USF''') was a CoreCodec project that attempted to create a clean, documented, powerful and easy to use subtitle file format. It is based on [[XML]] for flexibility, unicode support, hierarchical system, and ease of administration.


USF subtitles are usually used in [[Matroska]] containers.
USF subtitles are usually used in [[Matroska]] containers.
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== Example ==
== Example ==
Below is the example USF file as presented in the v1.1 specification:<ref>[http://titlevision.dk/usf.htm USF Specification v1.1]</ref>
Below is the example USF file as presented in the v1.1 specification:<ref>[http://titlevision.dk/usf.htm USF Specification v1.1]</ref>
<source lang="xml">
<syntaxhighlight lang="xml">
<USFSubtitles version="1.0">
<USFSubtitles version="1.0">
<metadata>
<metadata>
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</USFSubtitles>
</USFSubtitles>
</syntaxhighlight>
</source>

== References ==
{{reflist}}


== External links==
== External links==
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}}
}}


== References ==
{{reflist}}


[[Category:Subtitle file formats]]
[[Category:Subtitle file formats]]

Latest revision as of 07:07, 24 February 2023

USF
Filename extension
.usf
Internet media type
text/xml
Initial releaseNovember 10, 2002; 22 years ago (2002-11-10)[1]
Latest release
1.1
November 28, 2010; 14 years ago (2010-11-28)
Type of formatTimed text
Open format?Yes
Free format?Proprietary
Websitehttp://www.titlevision.dk/usf.htm

Universal Subtitle Format (USF) was a CoreCodec project that attempted to create a clean, documented, powerful and easy to use subtitle file format. It is based on XML for flexibility, unicode support, hierarchical system, and ease of administration.

USF subtitles are usually used in Matroska containers.

The format has come under criticism, especially from the fansub community,[2] because compared to the format it aimed to replace, Advanced Substation Alpha (which is based on comma-separated values), it is more verbose and far harder for software to read, write and manipulate. Also, it is not easily human readable and much harder to edit "by hand" in text editors such as Notepad. For these reasons, as well as the lack of a generic cross-platform parsing/rasterizing library and mature editing programs that natively support it, the format has not gained wide acceptance.

No known media player software implements more than basic support for this format. VSFilter, and VLC media player (starting with the 0.9.0 release) can extract the subtitle text, timing information and very restricted formatting.

Documentation for the format is now hosted by the Danish subtitling software company Titlevision here.

Example

[edit]

Below is the example USF file as presented in the v1.1 specification:[3]

<USFSubtitles version="1.0">
  <metadata>
    <title>The Universal Subtitle Format sample</title>
    <author>
      <name>[Toff]</name>
      <email>christophe.paris@free.fr</email>
      <url>http://christophe.paris.free.fr/</url>
    </author>
    <language code="eng">English</language>
    <date>2002-11-08</date>
    <comment>This is a short example of USF.</comment>
  </metadata>

  <styles>
    <!-- Here we redefine the default style -->
    <style name="Default" >
      <fontstyle face="Arial" size="24" color="#FFFFFF" back-color="#AAAAAA" />
      <position alignment="BottomCenter" vertical-margin="20%"
                relative-to="Window" />
    </style>
        
    <!-- All others styles herite from the default style -->
    <style name="NarratorSpeaking">
      <fontstyle italic="yes" />
    </style>
    
    <style name="MusicLyrics">
      <fontstyle back-color="#550000" color="#FFFF00" bold="yes" />
    </style>
  </styles>
  
  <subtitles>
    <subtitle start="00:00:00.000" stop="00:00:05.000">         
      <text alignment="MiddleCenter">Welcome to 
        '''The Core Media Player'''</text>
      <image alignment="TopRight" vertical-margin="20" horizontal-margin="20"
             colorkey="#FFFFFF">TCMP_Logo.bmp</image>
    </subtitle>
    
    <subtitle start="00:00:06.000" stop="00:00:10.000">
      <text style="NarratorSpeaking" speaker="Toff">Hi! This is a <font size="16">
        small</font> sample, let's sing a song.</text>
    </subtitle>
    
    <subtitle start="00:00:06.000" stop="00:00:10.000">
      <karaoke style="MusicLyrics"><k t="700"/>La! La! La! <k t="1000"/>
        Karokeeeeeeeee <k t="100"/>is <k t="200"/>fun !</karaoke>
    </subtitle>
  </subtitles>
  
</USFSubtitles>

References

[edit]
  1. ^ "USF FORMAT". Retrieved 1 December 2024.
  2. ^ amz (23 July 2008). "Universal Subtitle Format: a post-mortem?". Aegisub blog.
  3. ^ USF Specification v1.1
[edit]