Change the setting

Hi, when I create a stop motion video, the first Time I imported the image sequences, the animation was good, but while I was cleaning the animation from the rig, After effects stopped to work and he return to work only After set in the default setting, but my stop motion was horrible, because now I don't see a good video but the animation is very snappy, and I try to clear the cache, I try to render the video to see if Is a preview problem, but nothing.