transcoding?

I’ve got a hard-drive full of h264/mp4 gopro videos that I want to convert into h265/mp4. On the tests I’ve run, I can cut the size down to about 25% of the original file sizes with minimal loss of quality.

On my (old) i5 laptop, I use this command:

Code:
ffmpeg -nostdin -n -i input-file.MP4 -c:a copy -c:v libx265 -crf 23 output-file.mp4

Q1: Can I do this on a Minix U9-H?

Q2: Would that be faster than doing it on an i5 laptop?