I'm not sure if it can do what you ask, but I would guess that Shotcut can. It's free, open source video editing software, and easy to learn, with plenty of online video tutorials.

Mitch

From: sudo-discuss <sudo-discuss-bounces@lists.sudoroom.org> on behalf of Jake <jake@spaz.org>
Sent: Wednesday, October 7, 2020 21:23
To: sudo-discuss@lists.sudoroom.org <sudo-discuss@lists.sudoroom.org>
Subject: [sudo-discuss] how to speed up a video file and reduce its size?

does anyone know the right ffmpeg or mencoder commands to speed up an MKV video
file by 20X while reducing its file size accordingly? Bonus if it doesn't take
twice the lifetime of the universe to do it

thank you!

-jake

_______________________________________________
sudo-discuss mailing list
sudo-discuss@lists.sudoroom.org
https://sudoroom.org/lists/listinfo/sudo-discuss