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How Important is Bitrate?


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#1 Deji Joseph

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Posted 25 November 2011 - 01:25 PM

This is an unwanted child discussion of the Cheap Red aesthetic thread, I was wondering how does Redcode minimum compression compares to Proress 444 and Film DPX transfers in information per pixel terms in relation to color depth and bitrate?
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#2 Phil Rhodes

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Posted 25 November 2011 - 02:06 PM

The least-compressed Redcode implementations produce data at a rate around 330Mbps, or about 42 megabytes per second. To keep the numbers round, we'll assume 4K means "quad HD", or a resolution of 3840 by 2160. Red claim they have 16 bit luminance precision (although it is extremely doubtful that any current camera sensor by any manufacturer has 16 noise free bits of precision). A single uncompressed frame of that specification would be about 47 megabytes. Redcode uses less data than that per second.

You work it out.
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#3 Simon Wyss

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Posted 25 November 2011 - 03:55 PM

Chuff, I read How Important is Bitrate like Nitrate!
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#4 Deji Joseph

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Posted 26 November 2011 - 06:40 PM

The least-compressed Redcode implementations produce data at a rate around 330Mbps, or about 42 megabytes per second. To keep the numbers round, we'll assume 4K means "quad HD", or a resolution of 3840 by 2160. Red claim they have 16 bit luminance precision (although it is extremely doubtful that any current camera sensor by any manufacturer has 16 noise free bits of precision). A single uncompressed frame of that specification would be about 47 megabytes. Redcode uses less data than that per second.

You work it out.


That means ignoring the fact the codecs are different, red code is only double the data per pixel compared to a canon dslr maybe that is why it suffers during aggressive grading erhaps?
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#5 Phil Rhodes

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Posted 26 November 2011 - 06:49 PM

Well, as you correctly point out, there are some fundamental differences in approach.

But yeah, to some extent.
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Rig Wheels Passport

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Willys Widgets

Tai Audio

Technodolly

Glidecam