I tried to cut small clips about 5 to 10 seconds long of various fishing video to join together for a movie entro later.

I used TMPGEnc Plus (The cut and join tab on MPEG Tools) and all the newly created clips are pixelated. You can see the digital blocks or the missing digital blocks of information at the beginning of each clip. Whats the fix? What other software will create 5 second clips to join later?

Thanks For Some Help!!