user29655: I want to connect my Arduino to my tv screen while playing a playstation/XBox game. When a certain screen comes up (like say when you die the same screen pops up) then I want Arduino to catch that and then trigger another device on and off. How might I be able to trigger something by having arduino read the screen then trigger something on and off?

user20245: Most Arduino platforms contain a very low power embedded processor.  As such it is very unlikely such a device will decode an NTSC or PAL signal let alone modern digitally compressed video.
Instead consider using a light sensor attached to your monitor.  This is more in line with what, for instance, the Arduino Uno is capable of.  If you can identify a spot on the monitor that will only change to a certain brightness at the conclusion of a game, you could look for that brightness level using a light sensor attached to the monitor and connected to an Arduino.
Here is a tutorial about using a light sensor with an Arduino.  Most of the circuit is for the display of which you need not bother with.

29655: <p>I want to connect my Arduino to my tv screen while playing a playstation/XBox game. When a certain screen comes up (like say when you die the same screen pops up) then I want Arduino to catch that and then trigger another device on and off. How might I be able to trigger something by having arduino read the screen then trigger something on and off?</p>
 20245: <p>Most Arduino platforms contain a very low power embedded processor.  As such it is very unlikely such a device will decode an NTSC or PAL signal let alone modern digitally compressed video.</p>

<p>Instead consider using a light sensor attached to your monitor.  This is more in line with what, for instance, the Arduino Uno is capable of.  If you can identify a spot on the monitor that will only change to a certain brightness at the conclusion of a game, you could look for that brightness level using a light sensor attached to the monitor and connected to an Arduino.</p>

<p><a href="https://cdn-learn.adafruit.com/downloads/pdf/adafruit-arduino-lesson-9-sensing-light.pdf" rel="nofollow noreferrer">Here is a tutorial</a> about using a light sensor with an Arduino.  Most of the circuit is for the display of which you need not bother with.</p>
