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DPX file size

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andrew sableton
DPX file size
on May 3, 2013 at 10:39:35 pm

Hi all,

I have never worked with DPX at all but might be needing to soon. I've done some googling but have not been able to find either a calculator or chart showing DPX file sizes. Any pointers?

Thx
AS


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Andy Winter
Re: DPX file size
on May 3, 2013 at 11:12:16 pm

by heart i would say about 8mb per frame (hd). but if you have davinci, just render in dpx with whatever specs your project has and know it for sure...


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Oyvind Stiauren
Re: DPX file size
on May 4, 2013 at 4:05:48 am

It's quite easy calculating it yourself:

H * W * No. channels / 8 * bits per channel / 1024 / 1024 = MB per frame

So for a DPX file in HD (1920x1080) with 3 channels (RGB) in 10 bits you'll have:
1920*1080*3/8*10/1024/1024=7.42 MB

--
Oyvind Stiauren
Post production supervisor, Colorist
Terminal

Mexico City


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Rohit Gupta
Re: DPX file size
on May 4, 2013 at 2:35:52 pm

For 10-bit DPX you lose 2 bits per pixel since 30 bits are stored in 32 bits. So size is 1920*1080*4+8192, about 8.x MB.


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Joseph Owens
Re: DPX file size
on May 6, 2013 at 3:07:15 pm

This is a good number to work with (8 MB/frame).

Think in terms of 10 or 11x ProRes, or about 11 GB/minute for 1080p23.98 for example.

jPo

"I always pass on free advice -- its never of any use to me" Oscar Wilde.


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