Gst.Event.new_buffer_size

function new_buffer_size(format:Gst.Format, minsize:Number, maxsize:Number, async:Boolean):Gst.Event {
    // Gjs wrapper for gst_event_new_buffer_size()
}

Create a new buffersize event. The event is sent downstream and notifies elements that they should provide a buffer of the specified dimensions.

When the async flag is set, a thread boundary is preferred.