The waveform operation creates an image showing the temporal audio activity within the recording like this:


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 example description
source-flavors */audio Flavor specifying tracks for which a waveform should be created
source-tags edit Tags specifying tracks for which a waveform should be created
target-flavor */waveform Flavor used for the generated waveform
target-tags preview Comma-separated list of tags to be added to the waveform

Additional notes:

  • All media, that match either source-flavors or source tags will be processed.
  • Using a wildcard in the target-flavor will cause the main flavor of the input being used.

Operation Example

  description="Generating waveform">
    <configuration key="source-flavor">*/audio</configuration>
    <configuration key="target-flavor">*/waveform</configuration>
    <configuration key="target-tags">preview</configuration>