At 9:47 AM +0000 11/29/00, Hugh Senior wrote:
>Hugh Senior wrote:
>
>> Playing QuickTime movies in 2.3.1 freezes computers with 64Mb RAM. Fine on
>> the machine with 128Mb.
>
>Jacqueline replied:
>>What platform? I am having similar problems in Windows 98, even if there
>>is 128 MB of RAM. It only happens on some machines (Dells, particularly.)
>
>Same here... Windows98 with 96Mb RAM and after first movie, the system
>freezes with ob=nly mouse movement available. Plug-pulling time.
>
>Mike replied:
>>Officially 16Mb of RAM for QT 4.1.2 We have had some problems with
>>playing movies originally in Autodesk FLC format - one or two freezes there
>>even with 128Mb of RAM. But mostly they play fine. How big are the
>>movies? - tossing them all into RAM may be a problem. Over-speedy
>>decompression seems to be the root of it all. We (Dave Cragg and I) are
>>still experimenting. And what platform? Latest crash was on Windows 98,
>>but we had some early crashes on the Mac (with 193Mb of RAM!) because of
>>doing things on preOpenCard, so I stopped that. Only do things in or after
>>openCard. Dave may have more to say.
Not much. :) I wrote to Hugh off list with a couple of things to check. Namely:
How does playing the files with the QT player compare to playing out
of Metacard. I've found that the QT player has trouble on Win NT when
the data rate gets overwhelming. (Interestingly, my NT machine is a
Dell.)
Check that the "preload" and "cache hint" settings are off in the
movies (Can be checked from QuickTime Pro)
Set the alwaysBuffer of the player (in Metacard) to false, and try to
set things up so that flashing can be avoided.
Other things to consider perhaps:
Are the movies playing from a CD or from the hard drive. If the data
rates were high, I got better performance by copying the movie from
the CD to a temp file on the hard drive and playing from there.
Loading times are increased of course. (Ethical issue of whether to
tell the user that you're copying megabytes to his/her hard drive,
even if only temporarily.)
I guess the total size of the movie is not so important as the
highest data rate point in the movie.
Is there any anti-virus software that might be slowing things down?
Is it a real "freeze" or just incredibly slow performance? I've never
experienced a complete freeze, but I've had something close to
treacle.
Also Hugh, does the problem happen immediately you try to play the
movie or does it play fine at first and then turn to goo after a few
movies have played?
Cheers and good luck!
Dave Cragg
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