[FFmpeg-user] small mp4 videos for advertisement

[negin tebyani]

I have these very small mp4 files, that have a good quality and they are
for advertisement. frames change rarely in these videos and I need to
encode some advertisement videos like these. for example this one is about
11 seconds and is 620kb. this is what I am looking forward to do.

http://malltina.com/upload/index_animation/JS-Boutique-Womens-Bateau.mp4

how can I achieve this?