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0073X - Subtitles Duration
published
0073X v2.0
Item image
SUBTITLES DURATION
Subtitles vs. Prog. Duration
EBU Tech 3264, Tech 3350, ...
Subtitles <= Programme
Duration Mismatch
https://qc.ebu.io/items/0073X/versions/2-0-0/
Check
Summary
EBU QC Id
0073X
Name
Subtitles Duration
Status
published
Category
absolute
Lead editor
Frans De Jong
Aliases
captions duration
Tags
video access service MXF
Versions
Version Status Edition date Saved by Note
Details
Description
Subtitles often are provided separate from the audiovisual material and typically have a different duration than the programme.

Examples include the use of EBU STL or EBU-TT subtitle files and MXF for the audiovisual content. The audiovisual programme's duration normally is larger than the duration spanned by the first and last subtitles. Checking for the latter, can spot cases where the wrong subtitles and programme combination is used.
Definition
The system shall test if the duration of the subtitles does not exceed the duration of the audiovisual material. Optionally it may report the difference in durations.
References
Examples

  • Input: "Programme Duration" = 1390 seconds
    Input: "Subtitles Duration" = 1400 seconds
    Input: "Duration Tolerance" = 10 seconds
    Output: "Check Result" = true
    Output: "Duration Mismatch" = 10 seconds

    Remark: Used as a Check (this is the only option for this Test).

  • Input: "Programme Duration" = 1390 seconds
    Input: "Subtitles Duration" = 100 seconds
    Input: "Duration Tolerance" = 30 seconds
    Output: "Check Result" = true
    Output: "Duration Mismatch" = -1290 seconds

    Remark: Used as a Check (this is the only option for this Test).

Input parameters
Name Default value Description Data model name Unit Locator
Output parameters
Name Alias Description Data model name Unit Locator
Test material
Title Version Download
Remarks
Remarks
Expected duration can be taken from several QC Test Items.

Examples: for MXF the Material Package duration may be relevant to compare to, and in the case of QuickTime the media duration.
User discussions
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