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Appendix B: Containers, Codecs, and Vantage Actions
Vantage Actions
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Lightspeed Live Capture User Guide
Metadata Actions
The Metadata Service Vantage component executes the actions the extract metadata
values, and perform conversions between attachment files, metadata labels, and
variables.
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Extract Action
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Populate Action
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Transform Action
Extract Action
The Extract action, executed by the Metadata Service, is used to extract specific values
from element attributes in XML or key-value pairs in JSON metadata. The Extract action
identifies and extracts specific values from structured metadata and populates
variables for use in downstream actions. The Extract action enables you to browse a
sample file and identify the location in the structured data where the value is located.
The workflow can ingest an XML or JSON file during job execution or by making web
service calls. The Extract action automatically generates XPATH or JSONPath references
from the structured metadata in these files to extract the data, and populates a variable
with the value. During execution, each extraction path is evaluated against the input
and the associated variables are populated for use in downstream actions.
This action is Open Workflow capable.
Populate Action
A Populate action uses the Metadata Service to read and write metadata labels. During
ingest, metadata labels can be added to ingested media and generally include trim
information, audio levels, file properties, and commercial metadata. The metadata
labels can then be reviewed and modified by operators using Workflow Portal. At any
stage of a workflow, Vantage can extract information from labels using the Populate
action, allowing Vantage for example to use trim points during a transcode, or audio
level information when creating the final broadcast asset. This action is Open Workflow
capable.
Transform Action
A Transform action uses the Metadata Service to transform metadata between XML files
(attachments) and labels. XSL style sheets are used to perform these transformations;
style sheets can be managed in the Vantage Management Console: Workflow Design
Items > Style Sheets. This action is Open Workflow capable.
Transcode Actions
The Transcode Service is the Vantage component that executes the Flip, Flip64, Split,
and Stitch actions—transforming media from one format to another.
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Flip Action