,How does higher frames per second like 10000 fps mean a super slow motion video??
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It has to do with filming speed versus playback speed.
When you take a normal video you’re usually doing about 30fps. This number isn’t random, it’s about what our brain can process to make a bunch of photos in a row look like smooth video. So 30fps means the camera is taking 30 pictures per second. When you watch that video you then play that back also at 30fps. You’re seeing 30 pictures each second. If you make a 5 second video you take 150 pictures and then play them back all in a row over 5 seconds.
When you do slo mo, you are taking many more pictures in that second but when you play them, you play at the normal speed. To make the math easy, let’s do 3,000fps instead of 10,000. When you take a video at 3,000fps you’re taking that many photos in a second. This means they are happening so much faster and so you can see much smaller changes between each photo. This lets you look at them and see those very tiny differences. Now if you tried to play them back at 3000fps as well, you wouldn’t really notice, they would be showing too fast for your brain to notice. But if you take those 3000 photos and play them back at the 30fps you’re used to, now you can see each frame, and notice all those little changes. But as you can see, it will take you a lot longer to play 3000 frames at only 30 per second. So now, everything you’re seeing is 100 times lower and the camera was taking each photo 100 times faster and you are seeing changes 100 times smaller than you normally would. When you can take photos so quickly to get those little changes between each frame, that’s really what slo mo is doing.
Finally, worth mentioning that timelapse is the opposite. In that case you take photos very slowly, like 1 photo every 10 seconds, and then play all those back at 30 per second. Now one second of your video is actually 300 seconds (five minutes) of what you were showing or an hour every 12 seconds. Do an even bigger gap between photos and you can compress the time even further.
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