FFMPEG H265 Video re-encode only
As a video with h265 can have a size divided by 2 for the same quality, i think that knowing how to convert video to h265 without changing anything else is a good things
If we want to re-encode just the video streams, but copy all the other streams (like audio, subtitles, attachments, etc), we might use something like this:
(Code, 2 lines)
It will tell ffmpeg to:
read the input file 'input.mkv'
select all the input streams (first input = 0) to be processed (using "-map 0")