Page History

...

App_name is the name of the application that appears in the title bar of the window. Cyrillic is not supported.  The name must contain only latin characters and/or digits. If there are any other symbols in the window title, use third party tools to change the title.

additionalOptions allow setting a specific area and several other options. Below is the list of options supported by the ffmpeg library for the gdigrab mode:

...