I need to display text on live video - the text changes at random intervals based on certain parameters.. I have a program that updates the text in the text file when it needs to be changed based on the parameters. The "text from file" option in GDI+ text source works fine but there is an issue. I need the text displayed for 10 seconds and then go away. Then the text has to re-appear on screen for 10 seconds only when the text has been updated with new text - as long as the text in the file does not change nothing needs to be displayed. As long as the text is not updated in the file by my program i do not want to display the text - and as soon as the text in the file is updated, it should be displayed for 10 seconds and fade away. I cannot have the operator check for changes and switch to a scene for that. Can someone please guide me on how to achieve this?