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Re: [PLUG] Converting graphics on linux
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On Friday 19 April 2002 06:05 pm, gabriel rosenkoetter wrote:
> On Fri, Apr 19, 2002 at 05:15:19PM -0400, ian reinhart geiser wrote:
> > Unfortunately if I had the memory to contain 150megs of GIF file in
> > memory this would not be an issue. What I am looking for is a tool that
> > will let you write all of the files to one file, and not take up all of
> > the memory.
> >
> ::blink::
>
> Heard of virtual memory?
>
yup, once you hit it yer on the path to hell....
> In any case, no sane program would try to hold all of a 150 MB file
> in memory at a time; rather, it'd mmap() one page-sized chunk
i never said imagemagik was sane, did i?
please read about the problem description before getting too freaky here.
> (perhaps giving the VM system some preload hints about what it's
> going to want next), and then write out in the same size.
>
i am in no mood to hack my VM just to process a dataset. I mean I have seen
this done on MacOS where you can write directly to Qt movie files that are
almost a gig in size.
> Have you actually *tried* this and seen a memory error, or do you
> just believe there'll be a problem?
Yup, it gets about 50% of the way through on my system then it starts to
thrash wildly and it churns on it for an hour or two before it finishes....
I only have 256Megs here, and 512Megs of swap. Considering it takes about 5
minues to generate the initial dataset, i am wondering if i can write
directly to mpeg at this point. Hence why I posted the above response.
- -ian reinhart geiser
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