I have several MP4 files that I want to split one at a time. Here are two cases:

(1) I will not remove anything from the file; just split a very long file into separate pieces.

(2) I will cut out parts of a very long file.

In both cases, I cannot guarantee that the splitting will be exactly on an I-frame, but I can try. In any of the above circumstances, will the Splitter re-render or re-encode anything? If yes, under what situations?