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No problems here on several machines. What operating system and computer? QT acting up would point to a more generic problem...
I use Vista (in retroperspective this was probably a mistake, but the company wanted to test the capabilities with Vista when we bought the computer a year ago). And specs are:
*Graphics: Asus Extreme GeForce 8600GT SILENT 512MB DDR3 TV-out HDTV DUAL DVI RETAIL PCI Express
*HD: Samsung HD501LJ 500GB 7200rpm 16MB SATA2
*Audio: Creative Sound Blaster X-Fi Xtreme Audio Retail
*Mem: Corsair QUAD2X4096-6400C5DHX QuadDHX 4x1024MB (tot. 4096MB) Kit DDR2 XMS2-6400 800MHz
*Motherboard: Asus P5K iP35 4DDR2-DIMM 3PCI 3PCIe SATA Raid Audio GB-LAN Firewire Socket775 ATX
*Processor: Intel Core 2 EXTREME QUAD QX6850 3.0GHz 8MB FSB1333 Boxed (with cpu-cooler!) Socket 775
*Power: Sirtec/Chieftec CFT-750-14C 750W 140mm fan ATX2.0 20/24-pin 4/8-pin 12V Modular
Sorry not to give more info on the Quicktime problem, I don't remember exactly what more problems there where as we have had extremely much to do these last couple of weeks and I just freaked out and uninstalled it as soon as the problems emerged. I do remember the frame issue however, it was very clear, i imported an image sequence in premiere and everything worked fine, then i updated and frames were suddenly dropped, then i uninstalled and installed 7.5 again and it worked just fine. I also tried to flush the cache, restart and generally search for the source of the problem for a couple of hours.
Mmh, my guess would be the Soundblaster. These chips/ cards seem to have a bad habit of messing up other system components when you update drivers, probably due to some internal identification things changing or installs updating DLLs. As a minor, I would try to remove the card from your device manager and reinstall it. The rest of the stuff sounds more than sufficient for AE.
Ok, I'll try that. Do you know another graphics card (with ASIO) that is more reliable and works better with AE? I also sometimes get error messages in AE that there is not enough mem for audio. Also when you start a RAM-preview in a project with audio it takes a couple of seconds every time for the preview to start rendering because it is calculating audio stuff. In short bursts, this makes the audio calculations take more time than the actual image and effects, which is quite annoying as audio should be 493054354 times faster to render, and not an issue at all. But maybe this is just After effects, disregarding sound card type?
Well, I have not been using dedicated audio cards in years, I must admit. The supplied onboard chipsets in our workstations are more than enough for our needs, as we do all the serious audio stuff on our Avid editing suites and digital mixing consoles... I guess you could get other audio extender cards from TerraTec, Asus or Trust, but I have no experience I could share.
I've used QuickTime 7.5.5 on both OS X and XP with CS3 and CS4 for a couple of weeks and haven't seen any problems.
- Jonas Hummelstrand