With my C9.25 and ASI224MC, my normal process is to image Jupiter for 3 minutes at 150 fps (so 27000 frames) from which I normally use stacks of 3000, 5000 or 7500 frames (seeing dependent). For Saturn I use 5 minutes at 100 fps (so 30000 frames total), and stack 5000 to 10000 frames. For Mars I use 4 minutes at 250 fps (60000 frames) and stack 3000 - 5000. Neptune and Uranus I image for 5 minutes at 20 fps, normally stack about 50% of them.
I recently tried using WinJupos to derotate longer videos for Jupiter and Saturn, my latest effort was a 15 minute video on Saturn (see image section below). Since I'm on an alt/az mount I was able to use WJ to remove both field rotation and planetary rotation on the video, then stack and debayer in AS!3.
Don't be afraid to capture more frames, I store my videos on a 3TB external hard drive (about $100 at Officeworks) so I can always go back a reprocess data if I want
. AS!3 also has a great feature whereby you can just stack a smaller segment of the video stream, so capture for 10 minutes, stack the best 3 (as long as the 3 minutes are continuous).