From: "Chris Zwar" <chris@chriszwar.com>
To: "After Effects Mail List" <AE-List@media-motion.tv>
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Date: Tue, 29 Oct 2013 01:32:34 +0000
Subject: Re:  [AE] Quick AE Render question.
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I suppose it's not that LZW doesn't work with 16bit tiffs, it's just that=
 it's often less efficient to use it.  I just did a quick google to see i=
f there was much on the topic, and found this site with some comparison t=
ables:

http://havecamerawilltravel.com/photographer/tiff-image-compression-lzw-z=
ip

as well as a post from Thomas Knoll himself on the Adobe Photoshop forum =
saying the same thing.
But if you're dealing with flat solid colours or other content that is mo=
re suitable then LZW might work well for you.

FWIW I mentioned this because the original post reminded me of a project =
I worked on - many years ago now!  I was at a small studio and we were wo=
rking on a high-end project, I was compositing multi-pass 3D renders.  It=
 was the first time we had worked at 4K and it was decided that we would =
comp everything in 16bit.

We had all sorts of problems with hangs, crashes, slow renders etc etc.  =
We initially thought it was a bug with After Effects and maybe to do with=
 16 bit rendering.  Then the SAN / NAS went down and couldn't be resurrec=
ted, and a support guy had to be called in.  He said the problem was actu=
ally the SAN switch not coping with the load, and although it worked OK w=
hen we were comping 8 bit at standard or HD res, as soon as we all switch=
ed to 4K and 16 bit the increased bandwidth demands killed it.  I remembe=
r the guy saying 'the switch you've got is worth about 10 grand.  The min=
imum spec switch we recommend costs about 30 grand'.  So all of the probl=
ems had nothing to do with software, but actually the network hardware.

Anyway...


-Chris
-----Original Message-----
From: Rendernyc [mailto:rendernyc@gmail.com]
Sent: Tuesday, October 29, 2013 11:14 AM
To: 'After Effects Mail List'
Subject: Re: [AE] Quick AE Render question.

Ok. Caught up with the thread. Yes it was a large project with big images=
 and very long sequences and LZW definitely helped so ymmv

On Oct 28, 2013, at 6:38 PM, "Stephen van Vuuren" <stephen@sv2studios.com=
> wrote:

>> It's not a bug, it's just the way the algorithm was designed.  
> 
> Ah, that I do know about. It is not an efficient algorithm but for long=

> image and large image sequences, any lossless saving is good, so I tend=
 to
> have it on. It does occasionally cause some app support issues outside =
of
> AE. And really annoying that Premiere won't turn it on. In general
> Premiere's IO especially for 16-bit and higher is a no-show anyway. It'=
s
> needs AE's feature set desperately.
> 
> stephen van vuuren
> 336.202.4777
> 
> http://www.insaturnsrings.com/
> http://www.sv2dcp.com/
> http://www.sv2studios.com/
> 
> A film is - or should be - more like music than like fiction. It should=
 be a
> progression of moods and feelings. The theme, what's behind the emotion=
, the
> meaning, all that comes later.
> -Stanley Kubrick
> 
> 
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