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spoeschel avatar spoeschel commented on July 30, 2024

In this case the input file clearly violates the EBU STL spec: The STL file indicates "Level-1 Teletext" subtitles in the GSI header (DSC field set to value 1). As a consequence the vertical position (VP) field must always be in the range 1 to 23 (refering to the available Teletext line numbers) then, according to the EBU STL spec. So the value 0 is forbidden here.

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kbachmeier avatar kbachmeier commented on July 30, 2024

Ok, thank you! I will return this info to the colleagues from whom we got the file.

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andreastai avatar andreastai commented on July 30, 2024

@kbachmeier See also EBU Tech 3264 page 12 (bottom)

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kbachmeier avatar kbachmeier commented on July 30, 2024

ok, good to know

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andreastai avatar andreastai commented on July 30, 2024

As the root of the problem seems to be found I will close the ticket for now. @kbachmeier if you have additional questions or comments on this issue, feel free to re-open this ticket.

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