sir try nyo po tong Steps na nakita ko sa gubat baka makatulong eto
Wipe the Cache Partition
If the problem hasn't been solved by the previous two steps, try wiping the cache partition. To do this, turn your Galaxy S4 off, then press and hold the volume up, home and power buttons until your phone vibrates. Then let go of the power button but keep holding the volume up and home buttons until the Android System Recovery screen pops up. Press the volume down button to choose Wipe cache partition. Press the power key to select it.
This empties the contents of the cache partition. The files that could not be deleted by doing a factory reset will now be gone. This should solve your Galaxy S4 camera problems.