Why does the video slow down after conversion?

Question

Video

After converting, the video in FullHD format slows down, and this is the jamb of the file, noticeable regardless of the playback device. In a few frames, the picture slows down and loses clarity a little. Tell me, what's the matter - in the software (I used the Movavi converter), in the lack of hardware performance, or did you just need to choose a slow rendering mode?

Answer 1

It is possible that some error occurred when compressing. Therefore, the sequence of the code is violated, as a result, the player simply cannot read the data at this moment.