Name: scf
Owner: BBC
Description: Subtitling Conversion Framework
Created: 2015-12-18 21:28:48.0
Updated: 2015-12-18 21:28:50.0
Pushed: 2015-12-18 21:44:59.0
Homepage: null
Size: 1531
Language: Eagle
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The Subtitling Conversion Framework (SCF) is a set of modules for converting XML based subtitle formats. Main target is to build up a flexible and extensible transformation pipeline to convert EBU STL formats and EBU-TT subtitle formats.
The SCF is an early Alpha release with the version 0.2.3.
The Subtitle Conversion Framework (“SCF”) offered by Institut fuer Rundfunktechnik on GitHub is subject to the Apache 2.0 license.
For the XSLT modules an XSLT processor that is conformant to XSLT 1.0 is needed. You could use for example a saxon xslt processor from version 6.5.5. The STLXML2EBU-TT module requires in addition EXSLT support.
To validate an STLXML with the STLXML W3C XML Schema an XML Schema 1.0 parser is required. You could use for example xerces XML parser and validator.
For the conversion of an EBU STL file into STLXML python 2.7.x is required (it will not run under python 3.0).
Each module has its own directory under the “modules” folder:
---modules
+---EBU-TT2EBU-TT-D
+---STLXML2EBU-TT
+---STLXML-XSD
The main artefact is in the root of the respective module folder:
+---EBU-TT2EBU-TT-D
| EBU-TT2EBU-TT-D.xslt
In addition a README file is provided for every module.
Apart from the artefacts the module folder contains a folder with test files and optionally a folder with source code that tests the respective test files (e.g. Schematron files with assertions to validate XML based output).
+---EBU-TT2EBU-TT-D
| \---tests
| +---schema
| +---test_files
Currently the SCF has the following four core modules:
The STLXML W3C XML Schema is a tool to check if the XML representation of the EBU STL files conform to the expected structure. Files that don't conform will most probably fail the STLXML to EBU-TT conversion or will lead to unexpected results.
The STL2STLXML script decodes the EBU-STL file and exports it in a XML representation that can be used for further processing with XML technologies or for debugging purposes.
The STMLXML2EBU-TT XSLT transforms an XML representation of an EBU STL file into an EBU-TT that conforms to EBU Tech 3350 (EBU-TT Part 1). It follows the guideline provided by EBU Tech 3360 version 0.9.
The EBU-TT2EBU-TT-D XSLT converts EBU-TT Part 1 files that have been created according to EBU Tech 3360 into EBU-TT-D files that conform to EBU Tech 3380.
The EBU-TT-D2EBU-TT-D-Basic-DE XSLT converts EBU-TT-D files that have been created according to EBU Tech 3380 into EBU-TT-D-Basic-DE files that conform to the “XML-Format for Distribution of Subtitles in the ARD Mediathek portals” (EBU-TT-D-Basic-DE).
The test files that are used as test input for a module are named according to the following pattern:
requirement-[id of requirement]-[number of test for this requirement].[file suffix]
Example: The first test file for the requirement 27 in an XML format is named “requirement-0027-001.xml”.
If there are certain assertions written that can be automatically processed (e.g. by a schematron schema), then each assertion file has the corresponding file name of the test file (with file suffix of the assertion format).
A schematron file that tests the output of a module that gets the test file “requirement-0027-001.xml” as input would be named as “requirement-0027-001.sch”.
A documentation draft of all modules can be found in the folder documentation.
Furthermore each module contains in a documentation folder the requirements for the implementation and the current status.
Development: Tilman Eberspächer, Andreas Tai, Barbara Fichte, Dominik Garsche
Test Files: Barbara Fichte, Lilli Weiss, Tilman Eberspächer
QC: Barbara Fichte, Peter tho Pesch
EBU STL (EBU Tech 3264) https://tech.ebu.ch/docs/tech/tech3264.pdf
MAPPING EBU STL TO EBU-TT SUBTITLE FILES (EBU Tech 3360) https://tech.ebu.ch/docs/tech/tech3360.pdf
EBU-TT-D SUBTITLING DISTRIBUTION FORMAT (EBU Tech 3380) https://tech.ebu.ch/docs/tech/tech3380.pdf
XML-Format for Distribution of Subtitles in the ARD Mediathek portals (EBU-TT-D-Basic-DE) http://www.irt.de/en/publications/technical-guidelines.html