Dead limbs with fungus
Unfortunately, the image is very blurry, so I can't assess exactly which fungi are growing, but my guess is some wood rot fungi. If they are wood rotters, the fungi you see on the bark are usually evidence of extensive fungal growth inside the branch, and therefore the tree should probably be evaluated for structural health, especially if the limbs hang over any pedestrian ways or driveways.
Here is a better picture hoping you can identify what this is the limb is rotted thank you for helping me find the answer I will address it.
It's still too blurry to give a good ID, but I think the orange mushrooms are chicken of the woods. They are found on live or dead oaks but usually it is an indicator of a dying tree. Here is a link with photos and good info to compare. I would consider contacting a certified arborist to see if there is anything that can be done for the tree. http://www.mushroom-appreciation.com/chicken-of-the-woods.html#sthash.jlxwALv9.dpbs