i made it to 25fps, converted it and there`s just this 1 problem, the sound doesn`t keep up with the video

i`m going to try changing it to 22fps.
P.S.
If i would put a 1.10 version firmware on a Teclast Like Playerwich has a 1.08 version, will the player work better and fix this problem with the sound or atleast increase performance of the player?