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0156W - Roll Out Duration
published
0156W v2.0
Item image
ROLL OUT DURATION
Roll Out Duration
User Profile
Matches Requirements
Values, Mismatch
https://qc.ebu.io/items/0156W/versions/2-0-0/
Check
Report
Summary
EBU QC Id
0156W
Name
Roll Out Duration
Status
published
Category
absolute
Lead editor
Jens SCHNEEWEISS
Aliases
roll out roll off
Tags
MXF
Versions
Version Status Edition date Saved by Note
Details
Description
Inter-coded material frequently employs element reordering, i.e. the stored order differs from the temporal (or display) order.

To display the last picture described by the Duration of the associated Essence Track additional Edit Units may be required at the end of the Essence Container in order to preserve the correct temporal order. Which and how many coded pictures constitute the Roll-Out depends on the compression scheme and on the type of the last displayed picture. The number of Edit Units (i.e. pictures) in the Roll-Out is the count of Edit Units in the Essence Container minus Origin minus the number of displayed pictures in the Essence Container.
Definition
Used in Checks, the system shall measure the roll-out duration in the wrapper and check if it matches the expected one specified in the input. Optionally, the system may report the value.

Used in Reports, the system shall measure the roll-out duration in the wrapper and report it.
References
Examples

  • Input: "Roll Out Duration Expected" = 0
    Output: "Check Result" = false
    Output: "Roll Out Duration" = 5

    Remark: Used in Checks.

  • Output: "Roll Out Duration" = 5

    Remark: Used in Reports.

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
Please note that in MXF no metadata element exists to display the "roll-out", so it must be calculated. That is why this Test is a Measurement.
User discussions
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