DVD Playback in OS X |
December, 23, 2002 10:18 AM |
sprocketworks |
Here is my set up. 9600 384 Megs of Ram (non interleaved from OWC) Radeon 7000 VST Ultratek IDE card with 2.2.4 firmware OSX 10.2.2 August Radeon Drivers Under 9.2.2 the DVD playback works flawlessly. Under 10.2.2, I get choppy playback and video out of sync. Any suggestions to remedy this problem? Doug |
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RE: DVD Playback in OS X |
December, 24, 2002 7:53 AM |
chibi_delenn |
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I too, am getting crappy DVD playback in OS X. It's smooth as silk in OS 9 but slow as crap in OS X. I did throughput tests, and measured the actual read/transfer rate at a paltry *1.3 MB/sec*. For those less savvy about DVD speeds, that's HALF the speed of a 1x DVD drive. My HD performance in OS 9 is total crap too. 4-5 MB/sec max, where on my old Tempo ATA/66 card it was 12-14 MB/sec, and even faster in OS X. I also used to get flawless DVD on the Tempo ATA/66 card as well. Here are my system specs: PowerMacintosh 8500 512 MB RAM (Interleaved) ATI Radeon PCI DDR 32 MB (R7200) Sonnet Tempo Trio ATA/133 + Firewire + USB PCI Card (UltraTek 133 chipset, according to OS X's driver/kext load screens) Two Seagate 40 GB ATA/100 HDs Pioneer DVD-106S 16x/40x DVD/CD-ROM Drive MS Intellimouse Explorer Optical (anybody else here get the "jumpy" cursor wheneve they click sometimes? I've had it happen on six different MS mice on my comp) ATAPI drives *are* supported on the Sonnet Tempo Trio (UltraTek 133) card under OS X, and are seen as true IDE. Now, I know that IDE chips are CPU bound, meaning that they require the CPU to handle the pipelining for them, whereas SCSI controllers have their own RISC controller chip to shuttle data through, but this shouldn't make the drive less than *half* the 1x DVD read rate. There has to be a problem neither of us are seeing yet...hopefully Sonnet will get back to me sometime this millenium. - Chibi Delennâ„¢ |
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RE: DVD Playback in OS X |
December, 24, 2002 2:24 AM |
marcush |
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Insufficient RAM is probably the problem. The software DVD decoder is probably not getting access to enough main memory to buffer the DVD data. |
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RE: DVD Playback in OS X |
December, 23, 2002 2:38 PM |
mjoecups358 |
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Is the DVD drive connected to the Ultratek card? Try setting display to thousands of colors? Make sure DVD drive is set to master on it's own IDE channel? I am using a SCSI DVD drive that works well under 10.x Marty |
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