View Full Version : SPEED and REDCINE
Hello,
has anyone some idea about the improvement in speed when using REDCINE and exporting to HD QT codecs
with the use of a quad core or an 8 core MAC ?
Rob Lohman
09-21-2007, 03:20 AM
The more the better, basically. At the moment I'm working on some multi-threading optimizations. Even if we're not using all CPU's fully at the moment, that will only get better over the coming months!
Thank you for this clear reply.
Now, would you know, in case of use of the Macintel with 8 cores,
if there would be any speed improvement in using 16 Gigas of ram rather than 8 Gigas only ?
( when transferring original Redcode files into Quicktime)
The price difference is huge !
But with 8 cores maybe it seems adequate to use 16 Gigas,
what do you think ?
I know I'll have the camera (609) only at beginning of January but I rather plan things, I mean postproduction, sooner.
Thank you for your help.
Jean-Luc Leon
Rob Lohman
09-22-2007, 05:31 AM
Keep in mind that no 32-bit application (which all our apps and QuickTime [for now] are) can only use 2 - 3 GB of virtual memory. So getting more than say 4 GB is only useful if you plan to run memory hungry applications side by side.
The decode process will use a bit more memory the longer the movie is, but I would be surprised if this will ever go over 500 MB.
However, a program like redcine tries to cache as much frames in memory (until it hits the 2 - 3 GB limit).
Say you want to run Final Cut Pro, Photoshop and REDCINE at the same time it might be good to get 8 GB, but it will probably work fine with 4 as well.
The amount of processors tends to not have much in common with how much memory you have.
This all changes once the world really switches over to 64-bit.....
Paul Hazlett
09-22-2007, 06:46 AM
isn't leopard a true 64 bit operating system?
ChrisLyon
09-22-2007, 11:32 AM
Yes, it is.
Rob Lohman
09-23-2007, 03:55 AM
There are a ton of "true" 64-bit Operating Systems already out (for years). Including three different versions of 64-bit Windows and various Unix flavors.
That doesn't really mean much however. You need 64-bit driver support *and* 64-bit applications to take advantage of such an OS. Otherwise the apps are still limited to 2 - 3 GB of memory (per application). But you can run more of those side by side since the OS can have much more memory available...
Billy Summers
09-23-2007, 04:36 PM
wowza...
Rob, your awesome
That was some seriously cool information!
Thankyou,
B.
Gavin Greenwalt
09-23-2007, 04:41 PM
The more the better, basically. At the moment I'm working on some multi-threading optimizations. Even if we're not using all CPU's fully at the moment, that will only get better over the coming months!
Since frame processing is a very discreet task couldn't we just run two copies of REDCine at one?
Speaking of which... are you ready to comment on Command line features?
Joel Kaye
09-23-2007, 05:54 PM
Since frame processing is a very discreet task couldn't we just run two copies of REDCine at one?
Speaking of which... are you ready to comment on Command line features?
http://www.barefeats.com/octopro1.html#ae
"EIGHT-CORE -- A DIFFERENT WITH AFTER EFFECTS CS3
The 8-core Mac Pro showed more muscle when we ran After Effects CS3 beta. After Effects CS3 has an item in Preferences called "Multiprocessing." It has a check box that enables "render multiple frames simultaneously." When checked, AE spawned a process for each core called "aeselflink" and grabbed 1.6GB of real memory per process. It was like creating a "render farm" within one Mac."
That's how to put those 16 gigs of ram to work.
Rob Lohman
09-25-2007, 08:43 AM
One of the other big things is memory bandwidth. We are pushing around large amounts of memory which uses up memory bandwidth fast.
Jim Kanter
09-25-2007, 11:50 AM
Recommend at least 1 GB RAM for each CPU.
One of the other big things is memory bandwidth. We are pushing around large amounts of memory which uses up memory bandwidth fast.
Dear Rob Lohman,
sorry,
I understood your previous answers but forgive me, this one leaves me with ????
What does it mean in terms of equipment I should prefer ?
Please do not forget I am just a filmmaker, not a computer expert !
Rob Lohman
09-26-2007, 03:41 AM
jimk: why?
leon: if you get a modern computer you should be pretty good on that end, that remark was more for the people who build their own systems
Seung Han
09-26-2007, 09:52 AM
if you get a modern computer you should be pretty good on that end
lol...
:angry03: