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  #1  
Old 01-16-2013, 10:55 AM
hedgerocks hedgerocks is offline
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Join Date: Jun 2011
Location: NYC
Posts: 35
Default Video playback becomes slow and jerky.

Pro Tools 10 running on Mac OS Lion.
4 x 2.88 GHZ Quad Core Intel.
My session i dedicate 15 processors to pro tools. Leave one processor for the OS. CPU usage limit at 99%

Heres is my process for importing a video into pro tools. Convert to DV-Pro NTSC. Defiantly not an H.264.
Move to a dedicated drive for videos. Not on the same drive as my pro tools sessions or the OS.

Keep in mind these videos are never really longer then 90 seconds. and not that large in size to begin with.

I then move the video file to my second monitor and "fit to screen".

Typically everything works fine for a little while. Lets say an hour or so. But then the video starts playing back stuttery. Jittery. Whatever you want to call it.

This bogs down the session. Makes playback impossible.

I'll blow out the prefs.

That sometimes helps.

I'll restart the system.

That sometimes helps.

But there really does not appear to be any rhyme or reason to it. Sometimes everything works fine. Other times it craps out. This is unbelievably frustrating.

I've searched the DUC and various forums and just can't seem to make sense of it all. there appears to be a a lot of conflicting solutions. If one at all. Is there a definitive answer? Something I'm doing wrong?

Please help me geniuses of the internet.
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  #2  
Old 01-16-2013, 01:23 PM
Craig F Craig F is offline
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Location: Portland, OR
Posts: 12,606
Default Re: Video playback becomes slow and jerky.

Pt 10.?.?
Osx 10.7.?
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Thank you,

Craig
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  #3  
Old 01-16-2013, 02:02 PM
hedgerocks hedgerocks is offline
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Join Date: Jun 2011
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Default Re: Video playback becomes slow and jerky.

Os 10.7.5
pt. 10.3
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  #4  
Old 01-17-2013, 09:13 AM
hedgerocks hedgerocks is offline
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Default Re: Video playback becomes slow and jerky.

can anyone point me to a link that might further help me?
please?
I'll send you cosmic presents?
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  #5  
Old 01-19-2013, 01:26 PM
Larold Larold is offline
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Join Date: Mar 2005
Location: Los Angeles
Posts: 217
Default Re: Video playback becomes slow and jerky.

I have PT 10 HD on a Mac Pro 8 core 2.66 Ghz machine. I am using 3 monitors, one for video only.

I have found that converting my videos, (which are 50 minutes long) to DV was a waste of time, and actually degraded the quality, so I leave them as .mov files now.

Sounds like you are doing everything right. There is a preference for setting the quality of quicktime video playback...you might take a look there. Is your frame rate correct? Can your video card support your playback? Are there any other apps running, like time machine, etc, that kick in on a certain schedule? When you set your processor at 99%, if the computer even turns it's head and coughs, it may interfere with ProTools. That's why they recommend turning off Bluetooth, Screensavers, avoid spinning the hard drives down and all that stuff.


Hope that helps....

Last edited by Larold; 01-19-2013 at 06:00 PM. Reason: added more info
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  #6  
Old 01-21-2013, 10:16 AM
hedgerocks hedgerocks is offline
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Join Date: Jun 2011
Location: NYC
Posts: 35
Default Re: Video playback becomes slow and jerky.

yeah the HQ playback is unchecked - i only wish it was something so simple as that.

Time machine is disabled but I usually have my mail and instant messenger running in the back ground.

Do you think it could be that?

Should i set the CPU usage limit to 95%?

all screen savers and bluetooth are off.

This is my info on my graphics card

NVIDIA GeForce GT 120:

Chipset Model: NVIDIA GeForce GT 120
Type: GPU
Bus: PCIe
Slot: Slot-1
PCIe Lane Width: x16
VRAM (Total): 512 MB
Vendor: NVIDIA (0x10de)
Device ID: 0x0640
Revision ID: 0x00a1
ROM Revision: 3386
Displays:
Cinema HD:
Display Type: LCD
Resolution: 2560 x 1600
Pixel Depth: 32-Bit Color (ARGB8888)
Display Serial Number: CY81723DXMP
Main Display: Yes
Mirror: Off
Online: Yes
Rotation: Supported
Panasonic-TV:
Resolution: 1600 x 900 @ 60 Hz
Pixel Depth: 32-Bit Color (ARGB8888)
Mirror: Off
Online: Yes
Rotation: Supported
Television: Yes
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