DVD-R Read Problem

We have a DVD-R sent to us for a small FCP project that refuses to play correctly in our older (but totally up to date with OS 10.5 and FCP Suite 2). Herky jerky jump then stop as if the machine cannot keep up with the data flow. Drag and drop the file into FCP and it does the same thing.
However, on my MacBook Pro, same OS 10.5 and FCP S2, it plays correctly...so we got it into the G5 by transferring it to a portable hard drive on the MacBook Pro and walking it to the G5.
Why? Is it the DVD burner/reader? Is this an extra dense DVD file? It reads QuicktimeMovie with a standard .mov suffix.

Thanks much. Two follow-ups:
1) All of the combo DVD/CD burner/readers (and now there's a 3rd machine, my home iMac) are Apple supplied. My home iMac (1 year old, like the MacBook Pro) reuses to play the DVD file also, while my MacBook Pro of the same vintage will play it. Is the combo burner/player better in the MacBook Pro...the iMac just slower, and the 3-year-old G5 just slower? Dunno.
2) All of these machines have the same software setup -- all Leopard 10.5, all FCPS2.
The file is a .mov file with all of the normal characteristics of a QuickTime movie file. In fact, I compared a sample .mov file that I had digitized in a FCP project and they are identical. Has to be the DVD readers, right?
David A.

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Here is a link with instructions on how to use the HP Hardware Diagnostic Tool. This may be the easier option if you have the program on your computer. If not try the support assistant.
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To whom it may concern,
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I am an HP employee!!

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Wilkommen zu Apple Discussions!
Ich spreche ein bischen Deutsch, aber English war besser fur mich.
http://forums.macosxhints.com/archive/index.php/t-27950.html
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Hi,
First, try the automated fixit from Microsoft on the link below.
Vista
Check if the drive is now working.
If it still doesn't work, click the Start Menu, open All Programs, open Accessories, right click the Command Prompt and select 'Run as Administrator'. In to the prompt type the following command and hit enter.
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Regards,
DP-K
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Microsoft MVP - Windows Experience

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Help us to help you by posting the following information.
1. The complete Model Name. or Product Number. of the notebook - see This HP web document if you don't how to locate the model number and\or product number.
2. The complete version and name of the operating system you are using ( ie Windows 7 64bit ).
3. Is your notebook still covered under warranty? Check your warranty status Here.
****Please click on Accept As Solution if a suggestion solves your problem. It helps others facing the same problem to find a solution easily****
2015 Microsoft MVP - Windows Experience Consumer

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Alright, I unplugged my DVD-ROM reader drive, because the tray was broken anyways. So now I just have my DVD+RW. I changed it's jumper to master, plugged it back in, booted back up. Now wodim -precap shows it's info, and this is what is says:
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wodim: Operation not permitted. Warning: Cannot raise RLIMIT_MEMLOCK limits.Device was not specified. Trying to find an appropriate drive...
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Using /dev/cdrom of unknown capabilities
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Does write CD-R media
Does read CD-RW media
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Does not read DVD-RAM media
Does not write DVD-RAM media
Does support test writing
Does read Mode 2 Form 1 blocks
Does read Mode 2 Form 2 blocks
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Does restart non-streamed digital audio reads accurately
Does support Buffer-Underrun-Free recording
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Does read raw P-W subcode data from lead in
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Does play audio CDs
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Does support independent mute setting for each channel
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Does not support digital output on port 2
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Does allow media to be locked in the drive via PREVENT/ALLOW command
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Current read speed: 7056 kB/s (CD 40x, DVD 5x)
Maximum write speed: 5645 kB/s (CD 32x, DVD 4x)
Current write speed: 5645 kB/s (CD 32x, DVD 4x)
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Write speed # 1: 4234 kB/s CLV/PCAV (CD 24x, DVD 3x)
Write speed # 2: 3528 kB/s CLV/PCAV (CD 20x, DVD 2x)
Write speed # 3: 2822 kB/s CLV/PCAV (CD 16x, DVD 2x)
Write speed # 4: 1411 kB/s CLV/PCAV (CD 8x, DVD 1x)
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