Very choppy playback of slideshows on Mac

I apologize if this is already answered somewhere. I searched but couldn't find this problem.
I created a project in iDVD 6 consisting of a single menu with several slideshows using one of the included themes. After burning to a DVD-R media on my first generation MacBook Pro, the disk won't play back correct either on my computer or the Mac Mini in our house. It did play on the standalone DVD player.
On the computers, it proceeds very, very, very slow and choppy, while you can hear the DVD drive head constantly moving and pumping rapidly. I re-burned it several times on different brands of DVDs, all with the same result. I also created a disk image and burned it through Disk Utility at a slow speed, again with the same result. The iDVD settings are 4:3 ration, NTSC and "Best Performance" (although one time I tried "best quality" with the same result.
Any thoughts?
Thanks,
-Tom

Yes. I have also discovered since my last post that if I stop the DVD, wait until the drive stops reading without ejecting it, and then restart the DVD, it works fine. And yet it does this same thing every time. I've tried changing the theme and certain aspects of the main menu and re-burning it. I've tried burning it through Disk Utility. I have tried different brands of DVD's. And the playback problem happens when I play one of the burned DVDs on any of the three macs in our house. And in each case, if I stop it, wait and restart it, it works fine.
Odd.

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I also posted this in iDVD, but I am putting it here also in case it is a hardware problem that one of you have seen before.
I created a project in iDVD 6 consisting of a single menu with several slideshows using one of the included themes. After burning to a DVD-R media on my first generation MacBook Pro, the disk won't play back correctly either on my computer or the Mac Mini in our house. It did seem to play on a standalone DVD player.
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Are all files of all types giving you choppy playback, or just some? If it's only some files, then tell us as much as you can about those files.

Why am I getting such choppy playback?

Long time reader, first time poster, I'll make this short and sweet. Here are my specs:
Imac 27"
3.4 GHz Intel Core i7
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EDIT: Premiere 2014 updated to latest version. No big apps running aside from Premiere. All my drives have at least or close to 50% space available.

Recommend you take a look for disc layout & such over at the Tweaker's Page ...
Tweaker's Page ...
http://ppbm7.com/index.php/tweakers-page
Basically they recommend just the program file on the system/OS disc ... and then putting things on other drives as per the needs of the "asset" ... some need very fast connects, a couple only mostly fast connections.
Footage is mostly a one-way read-only operation, and export out is mostly a read operation, so those can at need be on somewhat slower connections as long as they aren't on the SAME drive over a slower connection. Such as say one of the PNY 128Gb high-speed USB3 flash-drives into a USG3.0 external port on your computer. I've adapted this from one of the other users, and it works fairly well for my 1080p footage. I export to one of several drives I've got in external boxes connected via USB. It's adequate, though not blazing.
Everything else ... project files, database, previews, cache ... there's a TON of read/write work going on constantly during playback with these. So 7200 or faster "standard" drives or SSD drives, connected internally via SATA-II or better, or external via eSATA-II and Thunderbolt connections are needed. None of the Firewire nor USB2/3 connections available have near adequate sustained read/write speeds to work in the massive testing they've done at the above mentioned site. The "burst" speeds claimed by manufacturers are achieved on the absolute most ideal set-up with the um ... right size? ... of data packets to get the best numbers. They aren't usable numbers for heavy and constant read/write demands like the Adobe DVA's through at the machine.
Remember ... during playback ... PrPro "reads" the source footage including when to jump in & out of every clip, throws in all your instructions for editing, color changes, transistions, effects, EVERYTHING ... and on-the-fly builds the image you see in the playback monitor. It doesn't make something for it to just 'read' from disc, it does this on the fly. Even when you make previews for a section of a timeline, any change you make ... those previews are outdated.
Which is why we all need machines that both have pretty solid hardware off the mobo, AND plenty of high-speed disc connections. Best case is say a 4/5 disc array of 2Tb discs in RAID 0 or 5 for the project files, d-base, cache, & previews ... and that can maybe even have media (original footage) on it.
Neil

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