8600 Power Mac/ G3 Upgrade (Mach Speed)
280 MHz
OS 9.1
512 MB RAM
8 GB Hard Drive
Disk Cache set to 16384 K
Virtual Memory ON / RAM Disk off
Quicktime Player 6.0.3
Memory allocated to QT = 16384 K.

This Mac crashes within a minute or so playing long Quicktime movies, always has. Also happened on OS 8.6. It also happened with previous versions of QT. Seems OK with short movies (less than a minute) however. Mac also freezes playing movies on Windows Media Player 7 after a minute or so.

Erasing prefs hasn't helped.

Could be a conflict...
Extensions Set I'm using for QT (exts left on): (CP) = control panel
Mach Speed, Apple Audio, Apple CD/Dve Driver, Apple Guide, Apple Monitor Plugins, Built-In Graphics Accelerator, CarbonLib, Contextual Menu, Control Strip, Foreign File Access, All QuickTime Exts, Sound Manager, UDF Volume Access, Video Startup, Apple Menu Options (CP), File Exchange (CP), Macintosh Easy Open (CP), Apple Eney DLPI Support, Apple Photo Access, Audio CD Access, Find By Content, Folder Actions, ISO 9660 File Access, Open Transport, Open Transport ASLM Modules, Serial (Built-in), Shared Library Manager, Shared Library Manager PPC, SOMobjects for Mac OS, Text Encoding Converter, Windows Media Player.shib, AppleTalk (CP), Control Strip (CP), QuickTime Settings (CP), Startup Disk (CP), TCP/IP (CP)

Since it runs for about a minute before freezing, maybe the data flow is filling up the RAM? Maybe Mac is just too slow?

Thanks for any thoughts on this,
Soulfilet