Uncompressed AVI bitrates

[iparout]

Hi there,

I was wondering how much space is required to capture in UNCOMPRESSED avi, full frame and full resolution.

Can anyone help ?

Thx.

[vitualis]

It is easy to work out.

An uncompressed video (PAL):

16 bits per pixel
frame of 704x576 pixels
25 frames per second

Thus, per second of video =
16 x 704 x 576 x 25 = 162201600 bit/sec
~ 19.3 Mb/s

If you capture in 32 bit, double this figure.
If you caputre in 24 bit, multiple this figure by 1.5

Remember, you have to add the bitrate for audio as well. (approx 0.15 MB/s).

Regards.

[iparout]

What does the number of "bits per pixel" have to do with ? Does it improve quality when this number is raised ?

Thx again.

[vitualis]

1-bit per pixel = black or white
8-bits per pixel = 256 colour or 256 grey tones
16-bits per pixel = 65,536 colours ("High-colour&quot
24-bit per pixel ~ 16.7 milion colours
32-bit per pixel ~ 4.3 billion colours

The number of bits per pixel are involved with the colour depth.

Regards.

[iparout]

Oh, I see.. Thx vitualis.

Last question :

What's the ideal configuration for the color depth ?

[vitualis]

If you are planning on encoding to MPEG, 16-bit is enough. Correctly me if I'm wrong, but I think MPEG-1 is in 16-bit colour.

Regards.

[iparout]

I'm planning on encoding to MPEG1 or MPEG2 (VCD or SVCD) and later on to DVD (MPEG2)

[iparout]

Well, can someone tell me what the color depth for each video format is (DVD, VCD, SVCD, DivX), so I will know which color depth is adequate for each format when capturing ?

Thx in advance