frames, hz and time

[ebby82]

If I am trying to convert hz to seconds I feel like I am doing something wrong.
The question is I have 62 frames at 400 hz and would like to get seconds from it.

62/(1/400) =24800
I think that number is too big when I want it in seconds am I missing something?

 

[Flapdrol1337]

The period of 400 hz is 1/400 seconds. What are you trying to calculate exactly?

 

[xorbe]

If I am trying to convert hz to seconds I feel like I am doing something wrong.
The question is I have 62 frames at 400 hz and would like to get seconds from it.

62/(1/400) =24800
I think that number is too big when I want it in seconds am I missing something?

You have 62 frames that are each 1/400 of a second.

62 * (1/400) -> 0.155 seconds or 155 ms

 

[fralexandr]

assuming you mean 62 frames @ 1 frame == 1 cycle AND you want to compute how long it takes to finish those 62 cycles or frames:
400 hz = 400 cycles/ 1 second
62 cycles / 400 cycles per second = 0.155 seconds

(62 cycles) / (400 cycles/ 1 second) = 62 cycles * 1 second / 400 cycles
62 seconds/400 = 0.155 seconds

note: likewise you could replace cycles with frames assuming you're trying to calculate how many seconds it takes to complete 62 frames at 400 frames per second...

 

[ebby82]

Sorry i am looking at time for a movement i captured.

The total frames for the whole movement is 177 but I am only trying to get the time in seconds for the 62 frames I am looking at.

When I did the calculation above I got that number but considering the movement is maybe 3-4 seconds total I thought maybe that was too big when only looking at 62 frames.

and i see why now.. because i was diving 1/400 and not multiplying it.