SK_Merge

You can use this node, If you want a Merge node to be ON only for a certain frame range, you can put in the values in the First and Last knob. 

I created it so you dont have to go to the dopesheet or look at the keyframes to know / modify what frame that specific merge node is on. It was pretty simple to put together but I thought it might come in handy if you are doing this a lot for a shot.

Please leave a comment, if you have any suggestions.

Thanks,

Sean Kalra