WaveformWorkflowOperationHandler

Description

The waveform operation creates an image showing the temporal audio activity within the recording. This is be done with a probably well known waveform (see example image). The implementation uses an ffmpeg filter that produces a waveform PNG image file from an audio/video file with at least one audio channel.

Parameter Table

configuration keys	example	description	default value
source-flavors	*/audio	Input parameter is the source-flavor of the media files for which a waveform should be created. The *-operator can be used if the waveform should be created for all flavors with certain subtypes (like "audio" in our example).	EMPTY
source-tags	edit, waveform	Input parameter is the source-tag of the media files for which a waveform should be created. All media, that match source-flavors or source tags will be processed.	EMPTY
target-flavor	*/waveform	The output-parameter is target-flavor which should use the *-operator if it was used in the source-flavor too.	EMPTY
target-tags	preview	The output-parameter is a comma-separated list of tags that will be added to the waveform image media package attachment.	EMPTY

Operation Example

<operation
  id="waveform"
  if="${trimHold}"
  fail-on-error="false"
  description="Generating waveform">
  <configurations>
    <configuration key="source-flavor">*/audio</configuration>
    <configuration key="target-flavor">*/waveform</configuration>
    <configuration key="target-tags">preview</configuration>
  </configurations>
</operation>