So you're not going to find the same video at 2 different frame rates, because that would be 2 different videos.
If it is shot on 24 frames a second or 48 frames a second...those aren't things that you can convert one to the other.
Why they will be different is because universally the speed we play back all film, video, digital, all media....is between 23.98 (24) frames per second, which is movies....and television is 29.97 (30) frames per second. We never play media back differently. (obviously if you're at home and you want to watch something sped up...you can. But tv channels, movies, youtube, vimeo ....everything is playing your video's back between 24 and 29.
If you try to convert 24 fps to 48 fps - it will not come out, it will actually look crazy and wrecked.
If you convert 48 to 24fps, it will just lose half the frames and play back like it was 24fps in the first place. It looks totally boring and it is uterly normal. Nothing changes.
So because we don't change playback speed...that means that if you shoot a lot of frames per second.....when you play it back it becomes.......Slower.
48 frames per second is going to take 2 seconds to play back.
1 second to shoot 48 frames....and we play it back at 24 frames, so only 24 frames pass per second......24x2 = 48.....which is twice as slow or half as fast.
So the more frames you shoot a second, when you play it back, the slower the video is. This is how beautiful slow motion is created.
Most cameras can shoot 48, 96 or even 120 frames per second....but bigger than that you have to rent special cameras built specifically for this purpose.
A phantom camera can shoot thousands of frames in 1 second. So....if I sent the camera to shoot 12,500 frames in one second.....how long would that take to play back?
First one to answer correct will receive a prize.
Hope that answered your question.
Look forward to hearing from everyone.