The vcu_gst_app is a command line multi-threaded Linux application that uses the vcu_gst_lib interface similar to vcu_qt. The difference is to manually feed the input configuration and run the pipeline each time, whereas with vcu_qt, the application has to launch only once.
The command line application requires an input configuration file ( input.cfg ) to be provided in plain text. Refer to Input Configuration File for the file format and description.