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IRT-Open-Source / scf

Subtitling Conversion Framework
Apache License 2.0
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STLXML - invalid value for VP = "0" #69

Closed kbachmeier closed 4 years ago

kbachmeier commented 4 years ago

We use STL2STLXML and STLXML2EBU-TT to convert our STL-files to EBU-TT. Now we had an error with the STLXML2EBU-TT, caused by an invalid value for VP: "The only possible values of VP are decimal numbers between 1 and 23" Our STLXML contains the value "0" at the Node /StlXml/BODY[1]/TTICONTAINER[1]/TTI[1]/VP[1]

So the question is: do we have an invald STL file or are there problems within the STL2STLXML?

VP-Error.zip

spoeschel commented 4 years ago

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.

kbachmeier commented 4 years ago

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

andreastai commented 4 years ago

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

kbachmeier commented 4 years ago

ok, good to know

andreastai commented 4 years ago

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.