Description

The package duration in MXF (also called "component length") describes the duration of included packages, like the source package and the material package.

The source package duration includes the value of the "origin" metadata and so may be different to the material package duration, also in operational pattern OP1a, if a precharge exists.

Definition

Used in Checks, the system shall read out the source package duration and the material package duration indicated in the wrapper metadata and check if they match the expected ones specified in the input.

Optionally, the system may report the package duration values.

Used in Reports, the system shall read out the package durations indicated in the wrapper metadata and report it.

CheckResult definition v3

not in this version

Analysis method v3

not in this version

References

• SMPTE ST 377-1

  Remark: 9.4.2 The MXF timing Model, B.8 Structural Component

• SMPTE Elements Register

Examples

• Input: "Material Package Duration Expected" = 250
  Input: "Source Package Duration Expected" = 250
  Output: "Check Result" = false
  Output: "Material Package Duration" = 250
  Output: "Source Package Duration" = 260

  Remark: Used as a Check.

---

• Input: -
  Output: "Material Package Duration" = 250
  Output: "Source Package Duration" = 260

  Remark: Used as a Report.

A 'structural' badge marks a node with no Value of its own; its value, if any, lives on its children instead (Annex C).

Remarks

This QC Test can also be used to detect the presence of precharge.

In case of a "roll-out", the package duration will be shorter than the total duration of the wrapped essence (container duration). To read out the values of container duration for audio/video please use Tests #0009W (Latest version) and #0040W (Latest version) .

Please note, even if this metadata element is optional, according to ST377-1, it shall be treated as a Best Effort Property with a Distinguished Value = -1.