Can someone explain file size calcs to me? (1 Viewer)

[VenomP]

Like, how to do video size, image size and sound file size?

Thanks

 

[hollyy.]

image storage:

horizx vert x bit depth
----------------------------
8 x 1024 (= 1 Kb)

audio storage:
=(sample rate x sample size x time (min)) x (1 for mono, or 2 for stereo)

 

[cwongquer]

Video is
Frame rate per second (FPS)
x number of seconds
x size of frame
x number of colours (bitdepth)
So...
For example, a 3 second video of 16-bit colour of 800x600 res. at 30 fps is
3 x 600 x 800 x 30 x 3 x 16 = 2073600000 BITS

2073600000/ (8 x 1024 x 1024) will get you the megabytes, because
8 bits in a byte
1024 bytes in a kilobyte
1024 KBs in a megabyte.
247 mb Uncompressed..
Correct me if I'm wrong please..

Image
Frame size x bit depth
Say for a 800 x 600 size picture at 16-bits
800 x 600 x 16 = 7680000 bits image
7680000/(4x1024x1024) to get the megabytes..

Thats video and images, I'll be back with audio later. But i think its sampling rate x seconds, will check later

 

[VenomP]

3 x 600 x 800 x 30 x 3 x 16 = 2073600000 BITS

^So, is there an extra 3 in there?

(seconds) x (resolution) x (FPS) x (bit depth)

 

[cwongquer]

Because 3 represents 3 seconds..

 

[notmyrealname]

Like, how to do video size, image size and sound file size?

Thanks

Try HSC Online