Mattijs

Recently we started experimenting with lots of movie data loaded into ram. At the moment I am trying to load 2.5 GB of movie data into 4 GB of ram.

Without movie data max uses 42,5 MB. Then I start loading movies into ram until max uses up to 2.42 GB. Everything is still fine, but as soon as I go over 2.44 GB (about 600 MB total free memory left), max stops loading and crashes when I try to open a dialog. This is reproducable.

I'll have to investigate this further (what happens with other objects and what happens with other applications) but I wondered if anyone else works with this amount of movie data in ram and experiences problems with it?

Mac OS 10.4.8, Max 4.6.2, Jitter 1.6.3b2, G5 quad 2.5 GHz ppc, 4 GB ram, btw in jitter 1.6.3b1, max stopped responding instead of crashing. If someone would like to see the crashreports, please let me know.

I use the patch below for testing together with the system memory tab of the Activity Monitor.

I'll have to investigate this further (what happens with other objects and what happens with other applications) but I wondered if anyone else works with this amount of movie data in ram and experiences problems with it? 

max-crash-with-more-than-2-5gb-of-movie-data-in-4gb-ram

> At the moment I am trying to load 2.5 GB of movie data

If [jit.qt.movie] is really based on QuickTime, I'm afraid that an old API limits the size to 2GB only.

(I got such problem with another environment for optical processing.)

Bigger, it would be necessary to load by chunks.

> At the moment I am trying to load 2.5 GB of movie data
> into 4 GB of ram.

If  [jit.qt.movie]  is really based on QuickTime, I'm afraid that an old API limits the size to 2GB only.
(I got such problem with another environment for optical processing.)
Bigger, it would be necessary to load by chunks.
I hope I'm wrong on this!!!  -:(

On Dec 29, 2006, at 9:10 AM, Mattijs Kneppers wrote:

> Recently we started experimenting with lots of movie data loaded 

> into ram. At the moment I am trying to load 2.5 GB of movie data 

Sorry, but this limitation won't leave until MaxMSP is a 64bit native 

program (which isn't happening in the near future), what you *can* do 

however is use some advanced RAM disk software to add your movies 

into a RAM disk for similar usage. I've not used any personally, but 

http://www.google.com/search?q=RAMdisk+software+OS+X+TIGER

> Recently we started experimenting with lots of movie data loaded  
> into ram. At the moment I am trying to load 2.5 GB of movie data  
> into 4 GB of ram.

Sorry, but this limitation won't leave until MaxMSP is a 64bit native  
program (which isn't happening in the near future), what you *can* do  
however is use some advanced RAM disk software to add your movies  
into a RAM disk for similar usage. I've not used any personally, but  
there are a variety out there.

Joshua and Philippe, thanks for your replies.

Although I'm sorry to hear this it's good to know the logical cause for the crash. It took me quite some time to allocate the crash, perhaps, if possible, it is a good idea to print a message in the max window when the 2gb limit is reached.

Joshua and Philippe, thanks for your replies. 

Although I'm sorry to hear this it's good to know the logical cause for the crash. It took me quite some time to allocate the crash, perhaps, if possible, it is a good idea to print a message in the max window when the 2gb limit is reached. 

Quote: jkc wrote on Fri, 29 December 2006 19:11

----------------------------------------------------

> however is use some advanced RAM disk software to add your movies 

> into a RAM disk for similar usage. I've not used any personally, but 

And of course thanks for the ramdisk suggestion, I'll try this :)

Quote: jkc wrote on Fri, 29 December 2006 19:11
----------------------------------------------------
> What you *can* do  
> however is use some advanced RAM disk software to add your movies  
> into a RAM disk for similar usage. I've not used any personally, but  
> there are a variety out there.
>
> http://www.google.com/search?q=RAMdisk+software+OS+X+TIGER
>
> -Joshua 
>
----------------------------------------------------

And of course thanks for the ramdisk suggestion, I'll try this :)
Mattijs


> it is a good idea to print a message in the max window when the

Depends if your data are stored on disk or if it's a continuous dataflow.

On disk, I'd put a routine to stop the load at, say 1.9.

Thanks Joshua for explanation!
(I didn't remember the exact cause.)

Mattijs wrote
----------------------------------------------------
> it is a good idea to print a message in the max window when the
> 2gb limit is reached. 
----------------------------------------------------

Or even before!
Depends if your data are stored on disk or if it's a continuous dataflow.
On disk, I'd put a routine to stop the load at, say 1.9.
Just in case.

Max crash with more than 2.5GB of movie data in 4GB ram