|
Avid Pro Audio CommunityHow to Join & Post • Community Terms of Use • Help Us Help YouKnowledge Base Search • Community Search • Learn & Support |
#1
|
|||
|
|||
Jittery Video Playback
I have seen similar threads regarding this problem on other forums, but thought I would post something more specifically
related to my problem here as I'm running on an LE system. I recently upgraded from the last generation PPC iMac G5 running PT 7 to a new Intel iMac. (27" 2.93GHz i7, 8Gb RAM, ATI Radeon HD 5750 video card) This computer came with OS 10.6.4 installed on it. I am running Pro Tools 8.0.4 on an Mbox2 with all the latest updates available. The sessions and files are on a LaCie D2 Quadra 1Tb External HD. The video playback in Pro Tools is jittery. Looks as though it is skipping frames. It is doing this with both DV and H.264 (the only formats I currently have in sessions on hand). Most other problems I've seen posted regarding this refer to playback on a second monitor, but in my case it is jittery when playing on the computer monitor as well. The video files on their own play back without issue in quicktime player. These same PT sessions and video files play fine on my older system, and on other systems running 8.0.3 and OS 10.6.3. Has anyone had any similar experiences or got any suggestions? I'm wondering if doing a clean install of 10.6.3 and PT 8.0.3 would fix the problem, but I'm not sure if going backwards on the system software is a good idea. I don't even know if it's compatible with an i7 machine. |
#2
|
|||
|
|||
Re: Jittery Video Playback
Quote:
Where is the video being stored/streamed from? Internal or firewire drive? Is there a lot of audio coming from that same drive simultaneously? |
#3
|
|||
|
|||
Re: Jittery Video Playback
I have tried it with the video playing from the internal drive and the audio from the external, as well as with both video and audio coming from the same external drive with no difference. There's not an excessive amount of audio being played in my opinion.
|
#4
|
|||
|
|||
Re: Jittery Video Playback
Do you have a spare SATA drive that you could use for some testing? Use the restore DVDs that came with your Mac Pro and create a new boot drive and install Mac OS and PT only on it and see if you get any different results.
|
#5
|
|||
|
|||
Re: Jittery Video Playback
I'm running on a brand new iMac with one firewire 800 port. The only software I've installed on it is Pro Tools, anything else that's there would be on the install disks so, while I'm open any suggestions, I'm not exactly sure what such a test would reveal.
|
#6
|
||||
|
||||
Re: Jittery Video Playback
I have experienced similar issues in the past.
Is there any audio on the QT (video) file you are trying to play? I found that I needed to export separate audio and video files using QT Pro. Then import those separate files into my PT session. Hope this is of assistance
__________________
440Hz Yarra Valley, Melbourne, Australia ------------ Mac Pro 2,1 Dual Quad Core 3GHz 18 GB RAM OSX 10.9 Maverick's 3 x 1TB SATA 1 x 250 GB SATA (Seagate) PT 12.6.1 HD MC MIX RME UFX, Ferrofish A16 AE MIDAS Venice 320 -------------------- "The music business is a cruel and shallow money trench, a long plastic hallway where thieves and pimps run free, and good men die like dogs. There's also a negative side." Hunter S. Thompson |
#7
|
|||
|
|||
Re: Jittery Video Playback
Quote:
|
#8
|
|||
|
|||
Re: Jittery Video Playback
Quote:
|
#9
|
|||
|
|||
Re: Jittery Video Playback
Should anyone else find themselves in a similar situation, I have traced the problem to a faulty mini display port adapter. Once that was removed, the jittery playback problem was corrected.
|
Thread Tools | Search this Thread |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
video playback jittery jerky stuttery | hedgerocks | macOS | 17 | 11-26-2013 09:37 PM |
DVCProHD jittery video fix for ProTools. | Nathan W. | Post - Surround - Video | 0 | 01-05-2010 12:34 AM |
QT gets jittery in 7.4cs3 | Frank Kruse | Post - Surround - Video | 22 | 12-09-2009 06:03 AM |
Jittery, stuttery playback | SPC | 003, Mbox 2, Digi 002, original Mbox, Digi 001 (Mac) | 7 | 04-09-2003 09:37 PM |
Jittery Faders | Fran H | 003, Mbox 2, Digi 002, original Mbox, Digi 001 (Mac) | 0 | 02-11-2003 01:09 PM |