Stutter, jitter, whatever.

The real title of this post should be: "dang that FCP/h.264/5DII baloney!".
After having much trouble on FCP and being unable to resolve it, I've dusted off my copy of CS5 and started to learn it. Not transcoding is SWEET.
I'm aware some of this stuff I'm asking about has been talked to death, but I did look hard and am
not finding the specific solution I need.
I thought I knew this stuff, for the most part.
I've certainly done it successfully in the past, however, that was on a tower, FCP 7,
in an XDCAM network TV environment.
Now, using my own laptop and FCP 6.0.6 I am having the very devil of a time,
and FAILING utterly to understand the whys.
With the 5DII shooting 29.97, every transcode tool and flavor except one has failed dramatically to
produce first rate results when using FCP. Even the one that works is not perfect.
I've got a bad case of the jitters.
Some of the transcodes produce files that jitter.
Some produce files that play fine in the FCP Viewer but jitter once they are on the timeline.
Rendering just produces jittery rendered files. The same holds true for CS5.
Tried Streamclip after trying Log and Transfer, or as I like to call it, shiftapple8.
The best FCP results have been with Prores 422HQ capture through shiftapple8 and XDCAM 1080P 30 VBR.
Even that is unsatisfactory in some CU pans.
So, using small words so I can understand, (pretend you're talking to your cat) could someone be so kind, please, as to provide a 'recipe'?
As in:
Set your CS5 project up like this. Capture, project, timeline, all you consider critical.
Why always helps.
Transcode like this. Ditto.
The Mac is a 1st gen 17" unibody, maxed, 4g RAM, the drive is a Sonnet F2 twin ESATA to Expresscard34.
But while that makes a difference in edit and playback, it should not make a difference in rendered output.
right?
May the thoughput be with you.
And what is up with this text editor!?

Sorry to bail on this. Bottom line is that the saga continues. Been busy, as you'll see.
Just as an aside, why is it an acceptable state of affairs that these pricey products are so damn touchy touchy touchy,
so damn buggy buggy buggy? Why are we, all of us, not continuously harassing the publishers to make them more robust, more
transparent, and to do more to help us when their dodgy products go badeep?
Enough.
Here's where I am today, and let this be a lesson to all:
I was getting nowhere. I followed the (generously given) instructions I received here, to the letter. Repeatedly.
Nothing changed.
I cleaned up the laptop, bigtime. Nothing.
So I delved deeper into the vitality of my drives and RAM, and discovered that there were a whole lot of processes going on in the background
that I could not turn off even after deleting the app. Yes, you, Verizon. Among others.
Here's where I really went wrong: I listened to Apple, in the person of the manager at my local Apple store.
He recommended I start over. Backup, reinstall the OS, reinstall the NLE's (PP, FCP, MC).
Desperate times...
Did it. As a result, I am in worse shape than ever. NOTHING WORKS.
Lame #1:
PP (5) couldn't compile media owing to an unknown error. That's helpful, Adobe, thank you. ....And then suddenly it could.
Then it couldn't play video for more than a few and varying number of frames. Repaired permissions,
and now it plays. Working it. No doubt there are other probs, but as of today it is NOT stuttering. Yay.
Lame #2:
Composer won't let me in because it thinks I'm trying to run two machines when I only own one license.
That should be easy to resolve if Avid ever responds.
Then we'll see what else is broken.
Lame #3:
FCP won't open at all. I get a crazy error message telling me to check with the developer because the app may not be compatible with the OS.
Oh, Apple, please. There's just one little line of something or other missing or corrupt, on a fresh install, and this is what happens?
Lame.
Lame.
Lame.
So if anyone out there feels my pain, please do share your wisdom on any or all of these issues.
If I sound pissed off, well, where would your head be after pounding it against this wall for over a week?
May the throughput be with you.
[Edited for content]

Similar Messages

Stutter/Jitter in DVDs

I've noticed a stutter or jitter in the movies on DVDs I've created using iDVD 08. The effect is as if some frames had been periodically dropped throughout the entire movie. The problem does not exist in the original iMovie 08 video or the video viewed in the Media Browser. The DVD stutter is visible on two different DVD players and the Apple DVD player application, so I believe the problem is an artifact of iDVD 08 or the settings I've selected. I double-checked the iDVD preferences, and I am using NTSC, Professional Quality settings.
I reviewed the other "stutter" problems mentioned in this forum, but none seem to have quite the same symptoms as mine. The fact that others are complaining about the problem implies the problem is with my set up, but I've not been able to identify the culprit yet. Any thoughts?
Thanks, Will

Some additional info on the issue: the stutter/jitter appears to occur only when the large.m4v file from the media browser is converted to another format. The two cases I've noticed are: a) burning a DVD with iDVD 08 (.m4v to MPEG2); b) importing the large.m4v file into iMovie HD (.m4v to DV I believe). The stutter/jitter doesn't occur when the medium.m4v is converted. The stutter/jitter doesn't occur when I play the large.m4v file with QuickTime Player, so I presume large.m4v is itself OK.
Does iDVD 08 and iMovie HD use QuickTime to perform the conversion? Could I have a QuickTime setting that is somehow causing this problem? If so, I would have expected to see the stutter/jitter after converting the medium.m4v file also, but for some reason it plays properly.

Apple TV Video Podcast Stutter

I have the Apple TV 2nd Generation. When watching video podcasts they stutter/jitter. I have tried adjusting settings on my TV, tried HD and SD videos with the same results. Anyone have any suggestions? Thank you

video podcasts are often steamed from the net so if the Internet connection is not fast enough this could happen

Need help identifying problem (lockup/freezing in Warcraft III & CS)

my macbook pro:
Model Name: MacBook Pro 15"
Model Identifier: MacBookPro1,1
Processor Name: Intel Core Duo
Processor Speed: 2 GHz
Number Of Processors: 1
Total Number Of Cores: 2
L2 Cache (per processor): 2 MB
Memory: 1 GB
Bus Speed: 667 MHz
Boot ROM Version: MBP11.0055.B08
SMC Version: 1.2f10
Serial Number: W862318KVWY
Sudden Motion Sensor:
State: Enabled
It freezes and has black screens during games in which apple Q and force quit doesn't work. I would need to restart the comp. when it freezes the sound would stutter, repeating whatever the game had playing.
things I tried but the macbook pro still froze:
running the game off USB storage device(so i think HD is fine)
wiping HD and reinstalling OS, updating everything and playing it on both USB and the installation of game (not 3rd party apps)
opening the macbook pro and cleaning out the dust (didn't take anything out, just blew dust off)
resetting RAM with apple options P R
took RAM out and put it back in
ran apple hardware test (everything was okay)
running a different game (Counter-Strike on CrossOver and still froze)
Disk Warrior 4 (only minor repairs and it froze in the test game after i ran DW4)
booting system from an external and running the game from USB
things to note:
although sometimes when it freezes, the temperatures are really high - even with fan control (70-80C) but, i've reproduced the lock up with the temperatures at 60C, so i don't think its a heat problem (thermal paste and whatnot)
sometimes in safari, quicktime, itunes, or just on desktop picture i would see a single, horizontal, 1 pixel-height distorted line running across the screen, which i can take screenshots of. no idea what's causing it but it could have some relation with the freezing/lockups
some days it will run without problems for the entire day, just to see lockups the very next day. I think it could be random.
help please..

=\ no one....

Logitech mouse scroll not as smooth as trackpad

Hello all, I have Logitech G700s mouse for my new Macbook pro 15" Retina (2013 Haswell).
When using my Macbook with the built in trackpad, scrolling is super smoth and very easy on the eyes. But when using the Logitech mouse, scrolling is very (choppy, stuttery, jitter - whatever you want to call it) just not as smooth as the trackpad. Is anybody else having the same problem?
I tried with and without Logitech drivers. Logitech drivers actually did help a bit, but scrolling still not as smooth as the trackpad. Is this something I will just have to deal with? or is there a fix? is it the mouse problem?
Any help would be appreciated.

Right Logitech mice aren't the best at scrolling. I have 2 of their mice and both work OK accept for the scroll wheel. They work but they jump around. Moving the wheel forward sometimes makes the system think it is first moving backwards. I find the Wheel scroll detents very weak and any pressure applied to it can cause it to think it has move forwards or backwards without really moving it at all. Just something I have gotten use to over the 2+ years I used them.

PPro CS6 Slow motion is jittery is there a fix

Hi
When i slow down a clip it jitters and is not smooth. Is there a fix for this? I'm certain that this shouldn't happen.
Thanks.

premiere has no real slow motion effect built into it. premiere does one of two things, it will repeat a frame or blend the two frames to fake a new original one. frame blend looks like ghosting, it may have worked on old tube tv's, but on todays lcd's its very noticeable. the same can be said of the repeat frame, on modern tv/lcds it will be noticed, which is the stutter/jitter you may be seeing.
so this depends on what the true frame rate of the archive footage is and it also depends on how much you are trying to slow down the footage, telling premiere to make up new fake frames. the file you have may report as 25, but very old camera's actually shot lower fps and the footage might have been thrown in a 25p project to be put on youtube etc. if the true fps of the archive footage is lower, you will notice the stutter/jitter even more.
as Ann says you can try After Effects, it does have some slow motion effects that do try to recreate a new frame not just repeat or blend frames. however this has its faults too, and creates artifacts around the areas of motion. this can be just as annoying and distracting. there are tutorials on youtube etc, that show ways to try and hide the artifacts to clean up the footage. there are also third party plugins, i believe Twixtor Pro is the most popular but also expensive.

Lockups, sluggish and choppy

My name is Neal and although i'm a computer technician i've had the biggest problems of my life with this machine. I started out with these specs:
Athlon XP1900+
512MB Crucial 2700
WD Seagate 80GB
MSI KT4V-L
MSI 128MB Ti4200 4x
Turtle Beach Cruz
430W Antec Truepower
Win XP Pro
I was getting very sluggish 3D performance, often everything was very choppy. My first instinct was that this was a RAM fault, and so i borrowed a stick to test it out, same problem. I ran 3DMARK for hours to see how my Ti4200 was performing. I could easily get well over 11000 points, very happy too, but when it came to playing a game i was back to the choppy performance.
My next thought was IRQ's, they checked out OK but i removed my sound card from the system to see how that figured. Still the same problem. I then clean installed windows again, still no joy and so i pointed my finger at a dud motherboard.
I went out and got the Delta-ILSR and started all over, and guess what shock horror, i was still getting the same crappy problem! And because of all the problems people have with incompatible memory i decided to steer clear and buy some mushkins.
It was time to check out this VGA card. I temporarily bought a 9800 Pro and stuck it in, slight improvement, no as sluggish but still a little choppy. But to add even more insult to injury my PC now locks up if i play for more than 15 minutes. I think that could be the summer heat, but i opened up the case, blew a 30 inch fan over my board and it still locked up. X(
I've tried all the obvious things i could think of; drivers, BIOS, IRQ's, Memory conflicts, fastwrites, SMART.... but i still can't figure this out. :O
So after all that my current machine stands at:
Athlon XP 2800+
512 Mushkin 3200
WD Seagate 80GB
MSI K7N2 Delta-ILSR
ATI 128MB 9800 Pro
Win XP Pro
Antec 430W
Any help would be much appreciated. I've never come across a machine quite like this one. I figure it must be a foul setting somewhere, but ?( ?( ?(
Neal

OK at the moment i'm set up as follows:
XP 2800+ 166FSB (Coolermaster silent copper heatsink/fan w/arctic silver 3)
1x512MB PC3200 Mushkin level 2 (slot 1)
40GB WD (7200RPM 8MB Cache)
Panasonic DVD-Rom
Sony Floppy Drive
ATI 9800 Pro (Aperture 128MB)
MSI Delta-ILSR (AC97 Audio enabled, all other onboard devices are disabled)
Truepower 430W & three system cooling fans
PS/2 Keyboard and Mouse
IIyama Pro 415 @ 1024x768 100Hz
Win XP Pro SP1
The problem has been the same throughout and i have replaced all my pieces of hardware at least once. All my games lag, stutter or whatever you want to call it. Some games are worse than others. Older games like Unreal Tournament tend to have no problems, i'm guessing this is because they need almost no 3D support, whereas newer games like Vice City, Nightfire, Jedi Knight 2 tend to be quite bad. UT2003 isn't too bad and is playable. Nightfire i would say is the worst and so i always use that game as my test game.
Theoretically i'm performing well. 16000+ points 3DMARK2001SE. PCMARK claims my CPU, memory and HDD work well. Memtest86 showed no errors after almost 3 hours of running the test.
Some videos i notice have lag as well and that can be resolved by disabling my soundcard. This however does not work as a solution in games. IRQ's all seperate, DMA modes are all correct. I installed my drivers according to the recommended nForcer's guide. Seems there is no issue there but i cannot be certain.
To me it looks like a bottleneck issue, the videocard is never getting the juice it needs, which i can hardly believe running under a True430 and a UPS for backup. But what i said before about games that don't need much 3D rendering work well, older games, seems to support my assumption.
The other possibilty is my memory. I've got 3 sticks of memory, no improvement between the sticks or between the slots i use in this mobo or my previous one (VIA chipset). So i can't realistically assume that.
See what you can make of that,
Thanks for helping out,
Neal

Jitter, stutter, or jerky playback on output

Hi friends,
I've edited a video in Premiere Pro CS4 and it plays smoothly in the timeline. However, when I export it for DVD output, and then preview it in Encore, every minute or so, it will play one frame out of order. I don't know whether to describe this as a jitter, a stutter, or jerky playback. The preview is accurate: if I burn a DVD from Encore, the DVD will have the same glitches in playback. Again, Premiere plays everything fine.
The frame can be pulled from before or after the current point in the timeline. The first glitch occurs at 08s 15f and plays frames in the clip in this order: 1,2,3,4,17,6,7,8,9... Then it goes to 01:24:15 and partway into another clip does this:
24s:14f
24:15
24:00
24:01
24:16
25:02
24:17 (back to normal)
Both of these clips with these symptoms have a lot of movement (people moving independently in the frame, plus camera movement), but there are other clips with nearly as much movement, and they do not have a problem.
The source footage is AVCHD 720 30p in a matching timeline. I do have some SD footage later in this timeline. This SD footage was captured to the computer via Firewire from a Canon Optura. It is "Scaled to Frame Size" and rendered in the timeline, and is causing zero problems. I exported using the Media Encoder. I am outputting to DVD using the MPEG2-DVD and NTSC Widescreen preset, with the aspect ratio changed from 16:9 to 4:3 and the quality set to 4.5.
I'm running Premiere Pro version 4.2.1 and Encore 4.0 on an Intel Core 2 Duo T9550 2.66 GHz with Windows 7 (64 bit), 4 GB RAM, a 5400 RPM 320 GB hard drive running the OS and the video files located on a USB 2.0 7200 RPM hard drive.
If any of you have ideas, I would be grateful.
Thanks,
Russ

I've been having this problem since installing Snow Leopard with QuickTime 10 way back when and it's caused me real problems with video rendering. I think it's a codec issue as my raw video files play back ok (H.264 codec), but when I export them and save as Photo jpeg or motion jpeg etc the playback has about 4 or 5 seconds of jerky playback near the beginning of the file.
I've just tried opening all my test files with QuickTime v7 and was staggered to see them all run perfectly. It is indeed very annoying.

Stutter in iMovie 5 & 6 - causes and workarounds

This topic discusses the problem of stutter in the playback of iMovie 5/6 projects — where the playback pauses repeatedly. The cause of the stutter is discussed here, with possible workarounds.
Over the last several weeks I've examined several stuttering projects, one provided by Marilyn Hudson and three by Benny Alford. Thanks to you both. They were very helpful.
I also examined several projects I created myself, after discovering how to force a project to stutter.
The tests I ran suggest that stutter is caused by the number of audio clips in the timeline of the project. When a large number of audio clips have been added to a project, the project begins to stutter. The stutter worsens as more audio clips are added, eventually causing the project to play very poorly, if it plays at all. The stutter improves as you remove audio clips, eventually allowing the project to play normally.
Frank Farmer, whose forum topic about stutter describes the problem nicely, is a good read:
http://discussions.apple.com/thread.jspa?threadID=495288&tstart=0
Benny's topic is also very helpful:
http://discussions.apple.com/thread.jspa?threadID=511773&tstart=100
BEFORE WE BEGIN, A CAVAET OR TWO...
Identifying software problems is never easy, especially when you don't have the code to read. So my conclusions may not be accurate in every respect. There may be "gaps" still to fill.
Certain features of the stuttering problem can vary from user to user and from project to project, so what I say may not apply to everyone or to every project. Likewise, your experience may not apply to others.
In light of that uncertainty, I hesitated a bit to even post this message, for some conclusions may be "wrong" for some users. Hopefully they will be "right" for most.
If your experience is hugely different than mine, please say. We will all benefit.
THE PROBLEM
Stuttering takes several forms. It may include pauses in video playback, pauses in audio playback, audio distortion, or some combination. I believe these all have the same cause, creating a variety of playback symptoms. (The behavior may vary because of a difference in video cards and other hardware features. The amount of RAM doesn't seem to matter. I didn't have lots of Macs to test.)
Stutter is not simply an inconvenience or nuisance. Stutter can make it impossible to edit a project. Playback becomes so poor you can't view the editing you've done.
Severe stutter can also make simple tasks impossible to do, like moving the playhead, starting/stopping playback, selecting clips, undoing changes and saving. Your editing grinds to a halt.
HOW THE PROJECTS WERE STUDIED
When I began I didn't know what I was looking for, of course. I had never seen stutter in any of my projects, but had read reports by others and had some guesses. I poked and prodded the projects looking for clues, aided by software I wrote to help evaluate the type and number of project clips. I tried to explore as many possible causes as I could think of, ruling out possible causes.
THE CAUSE
Every project I tested could be forced to stutter by adding a large number of audio clips. Conversely, every stuttering project could be made to stop by removing audio clips. The exact number of audio clips that caused stutter varied, but not the pattern.
Based on what I saw, the major contributing cause to stutter — perhaps the only cause — is the number of audio clips in the Timeline of the project. That will definitely cause the problem, not the length of the project, nor the project size, nor the iMovie version, nor the number of video clips.
I was unable to find any other contributing factor. You can't prove a negative, however, so I cannot be certain other causes don't exist. As we discuss this topic more perhaps other factors will emerge.
SEVERITY
The severity of the stutter varies by the number of audio clips in the timeline. Stutter begins with a few simple "popping" sounds, and gets worse as more audio clips are added. The popping is replaced by pauses and audio distortion. Stutter continues to worsen as you add more audio clips, eventually making the project hard to edit.
WHAT KIND OF AUDIO CAUSES STUTTER?
All kinds of audio clips cause stutter. The type of audio you add doesn't seem to matter. It's the total number of audio clips that matters, not the type.
The audio can be any of these types:
1) Songs imported to the project from iTunes or elsewhere;
2) Audio extracted from video clips; and
3) Voiceover clips — narrations you record in iMovie.
WHAT COUNTS?
It's the number of audio CLIPS in the Timeline that matters, not the number of audio files you import or create. Importing a song adds one clip to the timeline and one file to the project. Splitting that clip adds additional clips, increasing the likelihood of stutter. Splitting extracted audio clips adds to the clip count too.
Every audio split you do adds to the total, increasing the likelihood of stutter.
WHAT DOES NOT AFFECT STUTTER?
I saw no evidence that these factors contribute to stutter:
1) The number of audio and video files (files stored in the project's Media folder).
2) Overlapping clips in an audio track.
3) The length of audio clips.
4) Which audio track the audio clips reside on.
5) The number of video clips.
6) The length of the project.
7) The size of the project (file size).
8) The size of the iMovie Trash.
HOW MANY AUDIO CLIPS WILL CAUSE STUTTER?
It varies a bit, so it's hard to say exactly. Projects I tested from one user began stuttering at 60 audio clips. Others began at 125. The number seems to vary from Mac to Mac. My guess is a typical maximum is 90-100 audio clips, but that's just a guess.
Although the number of clips may vary from user to user, my guess is the number may be relatively constant for all your projects. Your projects might tend to start stuttering at about 60 clips, 90 clips, 125 clips or whatever. But that's just a guess.
One of the reasons a precise number of clips is difficult to say is that the stutter itself varies from occasional popping to long pauses, affected by the number of audio clips. It's sometimes hard to know exactly when stuttering begins. As you remove audio clips from a stuttering project, for example, the stutter may appear to go away, but you may later hear occasional popping. Then when you remove five more audio clips you achieve perfect playback.
COUNTING AUDIO CLIPS
Note that iMovie 5 and 6 lets us count the number of audio clips in the Timeline. When you select clips with the mouse, iMovie displays the number of selected clips at the bottom of the iMovie window.
Unfortunately, the clip count is not displayed when the "Select All" menu command is used to select clips. You must physically drag across the audio clips to see the total.
HOW CAN I FIGURE OUT THE CLIP LIMIT FOR MY STUTTERING PROJECT?
It's not hard to figure out how many audio clips your Timeline can hold without stuttering. You can do a simple test where you remove audio clips until the stutter stops.
First Save the project. (Do NOT Save the project again during the test.) Then select ten audio clips or so, and hit the Delete key. Check for stutter. If the project stutters, remove more clips. Continue removing audio clips until the stutter stops, then count the remaining audio clips. To count the remaining clips, select all the audio clips with the mouse and check the total reported at the bottom of the iMovie window. Subtract a few — just to be safe — and that's your clip limit. (If you hear occasional popping sounds later, subtract another five clips.)
To restore the project to its previous state, choose File > Revert to Saved.
IS THIS JUST AN iMOVIE 6 PROBLEM? OR JUST AN iMOVIE 5 PROBLEM? OR WHAT?
Stuttering occurs in both iMovie 5 and iMovie 6. I saw the same stutter in both.
There were indications that stutter begins earlier in iMovie 6 — with 10% to 20% fewer audio clips. That may explain why some users report that stuttering began when they upgraded to iMovie 6. iMovie 5's tolerance for audio clips seems a bit higher, so projects that play okay in iMovie 5 might begin stuttering when upgraded to iMovie 6. They may have been "on the edge" in iMovie 5, but when upgrading to iMovie 6, they start stuttering.
Stuttering also occurs in iMovie 3 and 4. I could create stuttering projects in iMovie 3/4 too.
The only version of iMovie that refused to stutter was iMovie 2. (I stopped the test after adding 400 audio clips.) Note that iMovie 2 may use very different QuickTime routines than later versions of iMovie, which may explain its reluctance to stutter.
SO, WHERE'S THE PROBLEM?
In spite of what I just said about iMovie versions, I suspect this is not an iMovie problem. The problem may lie elsewhere. Here's why:
1. It's possible to create stuttering movies in QuickTime Player too, completely independent of iMovie. I used QuickTime Pro to add audio tracks to a movie, and found that a normal QuickTime movie can be made to stutter. It behaves just like iMovie. (QuickTime Pro's "Add" command lets you add multiple audio tracks to a movie. Each audio track is equivalent to an audio clip in iMovie.)
2. QuickTime Player also stutters when it plays the small QuickTime reference movie iMovie places inside the iMovie project. (iMovie 2 has no such movie, suggesting its reliance on QuickTime is different.)
The existence of stutter in both QuickTime Player and iMovie suggests the problem is in the QuickTime software itself, not iMovie. iMovie and QuickTime Player both use QuickTime system routines to edit/play our movies. I suspect that's where the problem lies. (I mean the QuickTime system software underlying both the QuickTime Player and iMovie, not the QuickTime Player application.)
CAN I EXPORT PROJECTS STUTTERING PROJECTS TO THE CAMERA?
No, a stuttering projects cannot be successfully exported to the camera. The copy on the tape will stutter too. If iMovie can't play the project smoothly, it can't export smoothly to the camera.
CAN I EXPORT STUTTERING PROJECTS TO QUICKTIME?
The stutter does NOT affect exporting to a QuickTime movie. That export succeeds, I suspect, because the export to QuickTime is not a time-sensitive operation, unlike the export to the camera. The QuickTime export can take as long as required.
The ability to export successfully to QuickTime lets us use some of the workarounds described below.
CAN I BURN A DVD OF A STUTTERING PROJECT?
Yes, you can successfully burn a DVD of a stuttering project. The iDVD encoding acts a lot like exporting to QuickTime, apparently. iDVD takes whatever time it needs to encode the project; it's not a time-sensitive operation.
CAN STUTTERING PROJECTS BE REPAIRED?
Projects cannot be repaired so they will never stutter. The only permanent fix is for Apple to fix QuickTime, if that's where the problem lies.
Workarounds can remove the stutter, however, allowing you edit the project successfully.
IS THERE AN EASY WORKAROUND?
The workaround ADJUST PLAYBACK SETTINGS below is pretty easy to implement. Trouble is, it doesn't always work, and the improvement may only be temporary. But the workaround is easy to do, so it's worth a try.
This workaround adjusts your iMovie playback settings and Mac monitor settings to make it easier to play the movie. That reduces the playback burden on your Mac and may raise the number of audio clips the project can contain before stutter begins.
This workaround may also make it easier to edit your project, making it easier to apply OTHER workarounds. So it's a good first step before implementing (better) workarounds.
ARE THERE OTHER WORKAROUNDS?
Yes, there are several effective workarounds. They all eliminate the stutter in the iMovie project.
The workaround to choose depends on the amount of editing yet to do, and whether or not you want to preserve all the clips in the project as discrete clips. And, of course, the workaround must be convenient for you. Some require more "expertise" than others.
It goes without saying that the simplest workaround is to try to limit the number of audio clips you include in the Timeline. That's not an ideal solution for all projects, obviously, but when you can do it, that's the best solution.
The other workarounds are posted below, one workaround in each message. As you try them, please reply to that message when suggesting changes and reporting errors. Future readers should check for updated versions of workarounds posted later in this topic.
GENERAL OBSERVATIONS
• The type of stutter we see varies quite a lot. One project I tested, the large project authored by Marilyn, showed considerable VIDEO stutter when played on her iMac. The audio played fine. There was so much stutter the project could not be edited. When I moved Marilyn's project to my PowerBook 1.5 GHz G4, worse video stuttering occurred.
But when played on my desktop Mac (Dual 1 GHz PPC G4) the VIDEO played just fine but the AUDIO stuttered. The audio slowed down, as if playing in slow motion. A clip's audio could sometimes be heard well after the playhead moved beyond the end of the audio clip.
• It's easy to create a stuttering project. Here's how: Create a new project, record a few seconds of audio voiceover, Copy the voiceover clip and Paste it at the end of the project 9 times. (To move the playhead to the end before you Paste each time, press the End key on your keyboard.) Then select all 10 audio clips, Copy them, and Paste at the end of the project 9 times. The project now has 100 audio clips. Try playing the project. If it fails to stutter, Paste again at the end of the project. Repeat Pasting at the end until the stutter begins. Stutter will get progressively worse the more clips you Paste.
• I saw some strange window behavior when editing badly stuttering projects. The iMovie window began behaving strangely. Activating windows in OTHER applications windows stopped working normally. Clicking in the window of another application would activate the window — allow me type in it, for example — but the iMovie window refused to allow it to come forward. The iMovie window remained on top, although its three red, orange and green window titlebar buttons were disabled. It was as if the iMovie window had changed into a palette that refused to go to the background. Re-launching iMovie resolved the problem.
WHAT ABOUT iTUNES MUSIC?
There are reliable reports that (some types of?) iTunes music may affect stutter. Unfortunately, I wasn't able to reproduce that problem, no matter what music I tried. I can't suggest what type music to use — or avoid.
There is a workaround that has worked successfully for some. That is to use iTunes to burn an Audio CD of the songs you want to use, then import the songs directly to iMovie from the Audio CD. See the workaround "BURN SONGS TO AUDIO CD" below.
THIS IS GETTING LONG
There's more I could say, but it won't add much value. We'll learn more as we gain more experience, I'm sure.
Good luck with your projects. Let's hope the underlying problem, whatever it is, is fixed soon. In the meantime, share your insights and discoveries.
Karl

WORKAROUND 3: Divide and Conquer.
BEST SUITED FOR
This method is best suited for projects where you still have quite a lot of editing to do, and the project is stuttering badly.
This is my favorite workaround, for it allows you to continue to edit the clips normally as discrete clips, but in a stutter-free environment.
SUMMARY
To reduce the number of audio clips in the project, this workaround divides your project into two smaller projects. Each project — each Part — contains a smaller number of audio clips so it plays smoothly. You can edit the clips normally, for the project plays smoothly.
Later, when you have finished editing the Parts, you re-assemble the Parts back into a single project. The method of reassembly we use will not cause stutter in that project.
As you add more audio clips to each Part, you may see a Part begin to stutter again, just like the original. You've hit your audio clip limit again. It's not a big deal. You simply divide that Part in half again to reduce the number of audio clips, and the new, even smaller Parts will play smoothly.
Usually it's necessary to divide a stuttering project just one time, but more may be needed.
ADVANTAGES
Each Part of the divided project contains half the clips of the original project. The clips are preserved as discrete clips, which allows you to edit clips normally. (Other methods join the video clips, audio clips, titles, and transitions into a single clip so they are no longer editable as discrete clips.)
DISADVANTAGES:
1) Because the project has been divided into two (or more) Parts, it's not possible to play your project from start to finish.That's not a big problem, but it's not what I would prefer. (If playing everything is important to you, see the MODIFIED DIVIDE AND CONQUER paragraph below.)
Of course, you'll be able to play all the Parts together when you re-join the Parts later.
2) This workaround can require significant amounts of disk space, especially if the clips imported from the camera are long-running clips. (An hour-long lecture, for example, with no scene breaks.)
If the clips are small, dividing a 10GB project in half will use an additional 10GB disk space (the total for the two Parts). As you split the Parts, it will temporarily use more.
If the clips in the original project were long-running clips, each Part may require the same disk space as the original project. If the original project was 10GB, each Part may use 10GB. This is because of iMovie's non-destructive editing feature, which copies the long Media file for the long clip in the original project to each Part.
Later, when joining the two Parts into one project, allow 13GB for each hour of total run time.
3) If the project contains many clips, it may be difficult to divide the project's video and audio tracks accurately. iMovie bugs may make it difficult to correctly select and delete clips. Care must be taken when selecting and removing clips. More details below.
TO DIVIDE THE PROJECT, FOLLOW THESE STEPS
• Open the stuttering project.
• If you haven't done it yet, adjust your Mac and iMovie settings as described in WORKAROUND 1: Adjust Playback Settings. This may make it easier for you to divide the stuttering project. (Return your settings to normal after dividing the project.)
• In iMovie preferences > General, turn ON the checkboxes "Snap to items in Timeline" and "Play sound effects when snapping." We will create bookmarks in a moment, and this makes them easier to use.
• From the iMovie menubar, choose View > Switch To Timeline Viewer. (Ignore if the Timeline already uses that view.)
• Locate a good place to divide the project in half. In a moment, you will move the playhead to that place and create a bookmark. Later, you will divide the project there.
(If the project already has many bookmarks, consider removing all the bookmarks to make it easier to find your new bookmark. Use the iMovie menu command Markers > Delete All Bookmarks.)
• If your audio clips are heavily grouped in one area of the project, split the project in the middle of that area, not the middle of the project. You goal is to divide the number of audio clips roughly in half.
• Look for a location like this, which is ideal:
- At the start (or end) of a video clip.
- Where that end of the video clip has no audio clip below it.
If you can't find a clip end that has no audio clip below it, move the playhead to the start/end of a video clip, select the audio clip below it, and split that audio clip.
If the video clip is so long you must split it, split the video clip where there is no audio clip directly below it.
• Place the playhead where you want to divide the project, precisely at the start (or end) of a video clip. Create your bookmark.
• Write down the location (the playhead position) of the bookmark you created. If you've moved the playhead away from the bookmark, first re-locate the playhead exactly over the bookmark. Use the menu command Markers > Next Bookmark (or Previous Bookmark) to go there.
The playhead position is displayed just under iMovie's video Monitor. The time shown will be something like "33:52:10". Write it down.
• Save the project. Quit iMovie.
• In the Finder, click on the project and choose File > Duplicate. The Finder will require several minutes to duplicate the project. The Finder will name it "<Project Name> copy.iMovieProject", where <Project Name> is the original name of your project.
• When the Finder is done duplicating it, rename the duplicate project "Part 1 <Project Name>.iMovieProject". (We'll refer to this part now as "Part 1".)
• Open Part 1 in iMovie.
• In a moment, you will remove all the video and audio clips AFTER the bookmark, leaving the video clips and audio clips BEFORE the bookmark intact. They will comprise Part 1. iMovie sometimes makes it hard to select the clips you want to remove, so go slowly and carefully here.
• Read this paragraph and the three after it before you continue. Starting at the end of the project and moving towards the bookmark, select groups of audio clips in the bottom Timeline track and delete them. (Select the clips, then hit the Delete key.) After removing a group of audio clips from the bottom track, remove (any) audio clips above them in the middle track, then remove the video clips above those. Removing the video clips makes the timeline shorter, easier to work with.
• As you approach the bookmark, be careful. When you select an audio clip that's located close to the bookmark, iMovie sometimes (inappropriately) selects an audio clip or two BEFORE the bookmark, even though you don't drag over it. (I suspect those are audio clips where Direct Trimming has been used, and iMovie gets a bit confused.) It's important you not remove any selected audio clip located before the bookmark. You must unselect those before hitting the Delete key. To do that, hold down the Command key — the Apple key — and click on any selected clip located before the bookmark. Make sure only the audio clips you want to delete are selected, THEN hit the Delete key.
• If you mess up, don't worry. Use iMovie's Undo command. Or to undo all your changes, choose File > Revert to Saved, which reverts Part 1 back to when you opened it.
• Sometimes iMovie fails to delete all the video clips you've selected. (Another bug.) As you approach the bookmark, zoom in on the Timeline to view the bookmark area more closely. After pressing the Delete key to delete the video clips you've selected just beyond the bookmark, make sure all the video and audio clips after the bookmark were removed. If not, press the Delete key again.
• How go back and do what you just read.
• When all the audio and video clips after the bookmark have been deleted, save Part 1.
• Play Part 1. If it doesn't play smoothly, it still contains too many audio clips. That's unusual, but it happens. Later, you will have to divide it again, but don't worry about that now. You can divide it again after finishing Part 2.
• To discard the clips no longer needed in Part 1, empty the iMovie trash. Emptying the trash will save the project again, automatically. (It may be necessary to also empty the Finder trash to recover the disk space.)
• We now move on to Part 2. It's a bit different, so don't skip reading these instructions.
• Quit iMovie, closing Part 1.
• Duplicate the original project again. Name this copy "Part 2 <Project Name>.iMovieProject".
• Open Part 2 in iMovie.
• IMPORTANT: For Part 2, it's crucial that you lock the audio at the second half of the project before removing video clips in the first half, which you are about to do. Locking prevents the audio from sliding over when you remove the video clips in the front half, losing sync with the video.
To lock the clips , move the playhead to the start of the first audio clip you'll keep, then select all the audio clips and choose Advanced > Lock Audio Clip at Playhead.
• Starting at the bookmark and moving back towards the start of the project, select audio clips in the BOTTOM audio track and delete them.
• Repeat for the audio clips in the TOP audio track (the middle timeline track.)
• You are about to remove the video clips before the bookmark. There's a couple of things you need to know first.
1) Removing the video clips will dislodge the bookmark. Ignore its new position. The bookmark will no longer be located next to the dividing clip. That's okay. You won't be using the bookmark again.
2) iMovie may not actually remove all the selected video clips when you hit the Delete key. A few video clips may remain, still selected, at the (new) beginning of the project. Do not click the mouse for clicking it will unselect those clips. Before clicking the mouse, use the zoom slider below the timeline to zoom in on the (new) start of the project. If you see selected clips there, hit the Delete key AGAIN to remove them.
• If you don't understand what you just read, read it again. Then select all the video clips before the bookmark and delete them. Zoom in to check for any selected clips that were not deleted, and press the Delete key again, if necessary.
• Save Part 2 and empty the iMovie trash.
• If everything worked as it should, the Part 2 audio and video should still be in sync and the project should play smoothly. If it doesn't play smoothly, Part 2 still contains too many audio clips. You'll have to divide Part 2 again later.
• If either Part 1 or Part 2 needs to be divided again, use the same technique we just used, but instead of duplicating and dividing the original project, duplicate and divide Part 1 or Part 2. First read WHAT IF THE PARTS BEGIN STUTTERING LATER? just below for a naming suggestion.
WHAT IF A PART BEGINS TO STUTTER LATER?
As you add add more new audio clips to Part 1 or Part 2, these projects may eventually start to stutter, just like the original project did. That's okay, for now you know how to eliminate stutter by dividing the project. When dividing Part 1 or Part 2 use new names like "Part 1A" and "Part 1B", or the names that work for you.
HOW TO RE-JOIN THE COMPLETED PARTS
When you are done editing all the Parts, you will likely want to join the Parts back together in a single project that you send to iDVD, export to QuickTime, or export to the camera. (See below when exporting to the camera.)
Don't worry, the method we use to join the Parts won't increase the number of audio clips, so the joined project won't stutter.
FOLLOW THESE STEPS TO RE-JOIN THE PARTS
1. Create a new iMovie project. Name it "Joined <Project Name>.iMovieProject" or something. Save the project.
2. One by one, locate the movie "Timeline Movie.mov" that's inside each of your Part projects and drag that movie into the Joined project timeline. (Dropping the movie on the Timeline imports Part 1 to the Joined project.) First import Part 1, then Part 2, etcetera.
To locate the Timeline Movie inside the Part project you must first open the project package to see what's inside. In the Finder, Control-click on the project icon and choose "Show Package Contents" from the popUp menu. A Finder window will open, showing the contents of the project package.
Double-click on the Cache folder. Inside you'll find the QuickTime movie "Timeline Movie.mov". (It's a special kind of QuickTime movie, called a reference movie, that has no audio or video of its own, just pointers to files in the project's Media folder.)
Drag the Timeline Movie.mov into the Joined project timeline. That will import the audio and video of that Part as a single clip to the Joined movie. Because all the audio clips are "flattened" as part of one video clip, the Joined project has no audio clips, only one video clip for each Part. So the Joined project won't stutter.
When all the Parts have been imported, add your Chapter Markers for iDVD to the project, if desired, and send the project to iDVD.
EXPORTING TO THE CAMERA
When exporting the divided project to the camera you may prefer to export the individual Parts projects instead of the Joined project. The reason is that the Parts projects contain discrete clips, just like the original project, while the joined project contains only a few clips, one for each Part.
When exporting a project to the camera iMovie preserves the clips as clips. Later, if you re-import that tape back to a new iMovie project, iMovie returns the exported clips as clips.
If you want your tape to contain all the clips of all the Parts, export the Parts to the camera, not the Joined project. The clips will return as discrete clips when the tape is re-imported. Clips like titles and transitions will no longer be editable, but they will return as discrete clips.
(Some clips in the Parts don't return as discrete clips. Any adjacent clips iMovie has edited are merged into one clip when exported to the camera. So two adjoining title clips will return as a single clip.)
MODIFIED DIVIDE AND CONQUER
If you want to able to play Part 1 as you edit Part 2 — instead of playing one Part at a time — you can modify the Divide and Conquer method to include Part 1 in your Part 2 project. This requires more disk space, but that may not matter.
When you done editing Part 1 and are ready to start editing Part 2, drag the Timeline Movie.mov from Part 1 to the beginning of the timeline in Part 2 (after locking the audio clips in Part 2). That delivers all of Part 1 as a single clip in Part 2. That lets you play Part 1 as you edit Part 2. (When joining the Parts, skip importing Part 1 to the Joined project. It will arrive with Part 2.)
FINALLY
This is the most complicated workaround, but for some projects, arguably the best. If I've missed something, please say so we can avoid problems.
Karl

Opening a video playback app causes a system-wide stutter...

I've been experiencing a very odd bug, and I can't find anyone else who's had it, let alone had a solution to it.
When I open any app that plays back video (iTunes, QuickTime, VLC, DVD Player, etc.), it causes the display to hang up every few seconds. The hang-up lasts about a second, and persists even after I've stopped playing video and/or closed whatever app caused the stutter. Audio is unaffected, but the entire video output stutters, so you can see it even when moving the mouse pointer, scrolling up/down in a browser, etc. I have to restart to make it go away.
Imagine trying to watch a movie or tv show, and the picture pausing every few seconds, and you can maybe understand how infuriating this is. It essentially makes watching video impossible. As a pro video editor, this doesn't really work for me. Launching Final Cut Pro 7 doesn't cause the stutter to start, but if I launch say, iTunes, before FCP, all video output is affected by the stutter, and I have to restart.
The problem started occurring when I updated Snow Leopard from 10.6.6 to 10.6.7, and has persisted in 10.6.8
I've tried messing with video card settings, Display settings, updating video card drivers, uninstalling/reinstalling Perian, etc., all to no avail.
I would really appreciate any help on this. Thanks!

Anyone?

DPC latency + audio/mouse skip and stutter on t420s

Hello fellow thinkpad owners,
I have a new t420s (41717FU) core i7, 8GB RAM, and NVS 4200M discrete, win 7 64-bit pro. I use the minidock with 2 external 28" displays on DVI out.
I discovered major issues with latency with this machine; very noticeable loss of control for about half a second, plus annoying audio stutter, especially concurrent with network activity. This is quite frustrating, especially for a machine that is supposed to be high end core i7 with discrete graphics. I had a t410s previously and also had latency problems, and I know this is a real problem with several different models (just search 'annoying audio') on the forums.
I have used dpc latency checker as well as latency mon and narrowed the probable culprit to the network drivers associated with the gigabit ethernet. It took me a while to discover the relationship to the Intel 82579LM, since LatencyMon will identify the problem with NDIS.sys or NETIO.sys, giving sporadic latencies over 20000 microsecs, which made me think it was a Win 7 tcp stack issue or maybe some internal windows firewall blocking. During these spikes, the audio stutters, the mouse won't move, everything on the system just stalls for a split second. Temps on CPU seem within normal limits at about 70-80C. I've read everything I could find about this issue, including problems with NVIDIA drivers, ACPI, firewall/antivirus, etc etc, and tried most of those suggestions.
I spent a long time doing all kinds of testing, putting the machine on AC power and max performance, shut down various devices, disabled any component power-off states, disabled NVIDIA and displays, changed bios settings etc.
After all of this, I *know* my issue is related to the Intel Ethernet component, because if I disable it and use wireless connectivity (or no network at all) the problem simply goes away. Surprisingly, the wireless Centrino adapter, though slower, functions without any problem affecting DPC latency and I have no stutter with that (many have previously identified the wireless adapter being a problem especially related to power mgt).
Unfortunately, I require an ethernet connection. So just disabling that adapter is not an option. Here is what I've done to workaround the issue, though I wish it would be fixed for good with some kind of update from Lenovo, though I've called and emailed them and they seem to be ignoring this issue.
**** UPDATE 3/1/2012 ****
SOLUTION RIGHT HERE: INSTALL AN OLDER NETWORK DRIVER FROM HP (sounds crazy, but it works). See below link to driver download.
I (and many other owners of T420, 520, etc - see other posts if you doubt it) have *no* latency after installing this older driver from HP. But as soon as I install the Lenovo-provided driver 11.12.38.* or any later one from Microsoft or the Intel generic driver (intel no longer publishes the old driver), I see *immediate* problems with latency, mouse and audio stutter. But use the driver published by HP (specifically version 11.12.36.0, published 5/4/2011) -- Problem solved! I tested with streaming and browsing for several hours and no spiking or stutter.
Here's where to get the english language download from HP: >> DRIVER DOWNLOAD PAGE HERE <<
Lenovo, PLEASE: this is strong evidence of a faulty driver for those of us with a t420s (and other thinkpad users out there using the intel 82579LM chip under x64). I encourage you to review this solution and engineer an update for the Intel gigabit adapter, or at minimum, roll back to the older driver or some Lenovo approved derivative so it doesn't cause all of us notebook users such a major headache. It's very bizarre that we would need to go to another manufacturer to get a working driver...I was ready to return the machine over this issue!
Aside from that adapter problem, I've been pleased with the t420s performance and features. Thanks again lopiuh for this workaround.
Mojojojo in Austin TX
ADMIN EDIT - Lenovo is testing a beta ethernet driver. If you are willing to try it, please see the link below, and my post on page 6 of this thread. - mark
https://www.dropbox.com/s/llcgjaf45xpuoam/83rw20w1.zip
***** END UPDATE *****
**** OLDER STUFF I TRIED, which somewhat helped, but the real solution is to use the old HP DRIVER above. ******
Basically, my approach was to reduce the 'auto' parameters for the adapter, to reduce the amount of logic running on the adapter itself.
1. Install the PRO set extension tools on this adapter, so you can more easily manage advanced settings. I think Lenovo offers a version in the driver downloads area which adds this management extension, but it is not the standard one offered by the system update utility, and the intel site has a later driver, so I gambled and downloaded the latest version from Intel for this adapter. It installed without issue, but I'm sure Lenovo would prefer you stick with their OEM packages. Anyway, here's the one I used: http://www.intel.com/support/ethernetcomponents/controllers/82579/sb/CS-032239.htm (link near the top for the download). You may want to make a system restore point before you install any drivers outside of OEM approved.
2. Change the default settings for the adapter in Device Manager. Right click properties for the Intel 82579LM in Network Adapters. Change the link speed (if the extension was installed properly, you'll see the intel logo on the tab for Link Speed, and a choice for Speed and Duplex. Change this from 'Auto Negotiate' to whatever speed your network is. I have gigabit full duplex, and that worked for me. This by itself was the biggest improvement with DPC latency.
3. Go to the Advanced tab. I took the approach that I wanted to disable as much 'auto' stuff as possible, and force the adapter to use a particular setting. Thus:
Interrupt Moderation: Disabled
Jumbo Packet: 9014 bytes (I have several devices that can use bigger packets on network, such as readynas)
Performance Options: click properties: Flow control - Disabled; Interrupt Moderation Rate - Off; and then double the receive and transmit buffer sizes (for me this was 512 and 1024 respectively).
I hope this may be helpful to some other owners, but I don't work for Lenovo or Intel so please don't blame me if something goes wrong during your tweaking. This worked (for me) to significantly reduce stuttering problems, though they are not completely gone; your mileage may vary. If you have this same problem, I'd appreciate if you would post about it so I can understand if it is a more widespread problem.
Good luck, mojojojo
Austin, TX
Solved!
Go to Solution.

Hi mojojoj0
For my W520, up till now I do not have latency issues. My set of configuration for Intel NIC is slight different.
2. This may cause connection problems when you are connecting to different network. Different network (switches, routers) have different configuration. Previously I set it to Gigabit Full Duplex, I can't connect to any 10/100 network until I change it back to Auto negotiation.
I would suggest changing back to auto negotiation when you are connecting to outside network, not all places are using gigabit switches.
3. Interesting, I guess I would try it and feedback and see how much improvement for network performance.
From what I know, increasing receive and transmit buffer improve NIC and network card performance, but computer may slightly more memory.
Maybe you can try this, part of my settings:
Large Send Offload (IPv4) & (IPv6) Enabled
TCP & UDP Checksum Offload (IPv4) & (IPv6) Tx & Rx Enabled
IPv4 Checksum Offload Tx & Rx Enabled
Hope this helps!
Cheers
Peter
(Current: W520 4284-A99) (Refunded: W510 4876-A11)
=============================================
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Mark it as solved if the solution works for you, so it could be reference for others in the future
Dolby Home Theater v4 (ThinkMix V2)!
http://forums.lenovo.com/t5/W-Series-ThinkPad-Laptops/W520-Sound-Enhancement-Thread/m-p/451401#M155...

Bad Jitter in FCP 6 Export from 4.5 Source Project

Hi Folks,
I took a project created in FCP 4.5 on my old Power PC running X.3.9 and opened it in FCP 6.0 on our new Dual-Core Intel machine running X.4.11. (This, of course, required "updating" the project into 6.0 - I did a Save As to retain the integrity of the original project.)
All looked fine & I did what I always do - exported the final sequence using QT conversion as an uncompressed .mov file (never mind why - this is what works for us). Same settings used as always (as much as possible in 6.0). The resulting MOV shows an absolutely horrible jagged jitter (much worse than just an interlacing problem) around any area of movement at all.
This MOV gets taken into BitVice for MPEG-2 compression & encoding. The resulting MPEG-2 shows the jitter even more dramatically than in the MOV, but it's definitely showing up first in the MOV.
Sure seems like whatever it is occurred in moving the project from 4.5 to 6.0. Could that be? We have literally hundreds more projects that are going to have to go through this same workflow, so this has to get resolved. What could I be doing wrong? A setting somewhere? A bug? Any thoughts are greatly appreciated. Cheers!
Old machine:
Dual 1.8 GHz Power Mac G5
1.25 GB DDR SDRAM, 250 GB Hard Drive

Jim, Hanumang - Thanks very much for your replies. I tried both suggestions (Export as Self-Contained QT movie and Applying the Shift Fields Filter) and unfortunately neither produced a result any different than what I was getting. I did do side-by-side comparisons.
Let me try to explain more about what I'm doing and perhaps a light bulb will go off. Thanks again for any help with this.
We take ten year old high-8 tapes and capture them using an old Aurora Igniter X card (using the Aurora Online MJPEG-A codec), into a Power Mac G5 running Panther and FCP 4.5. Our capture settings are: 720 X 480 NTSC DV (3:2). Sequence Settings: same frame size & aspect ratio, Pixel Aspect Ration is NTSC - CCIR 601 / DV, Upper (Odd) Field Dominance. Everything, everywhere is set at upper field dominance.
I export this footage our of FCP for a variety of different purposes. I do it using QT conversion because that allows control over resizing, quality, color, codec, etc. It would be hard to imagine that this is where the problem is being introduced since it has worked for me flawlessly for years in FCP 4.5. Not ruling it out, just saying.
When I export using QT conversion, I select "None" as the compressor - when I'm in my DVD workflow. I dig what you're saying about that being a misleading name for a lossy codec, but I've been very happy with the results. I always set Upper Field First in these export settings as well.
Just to be clear, this is a workflow that has never produced this particular problem (horrible jaggy edges around everything that moves) coming out of FCP 4.5. This only started coming out of a project begun in 4.5 and converted into FCP 6.0. It's hard not to focus on the only factor that changed (converting the old project to the new FCP version). I really hoped Hanumang was on the right track with the Shift Fields, but alas.
Any thoughts - even on which direction to think in - would be greatly appreciated. As mentioned, we are going to be bringing many projects captured in 4.5 into 6.0. If we can't resolve this, it's going to be grim. Thanks, all! Cheers.
P.S. We love BitVice. They have also given us incredibly personal support. Compressor, I'm sure, is a great program, but I have always found it next to worthless for my needs.

ATV2 video judder/stutter on new LED HDTV

Equipment:
40" Samsung UN40D6000 LED HDTV 120Hz 1080P - software all uptodate.
AppleTV 2 software all uptodate.
Basic cable (SD) and HD content while watching television is solid, fluid and vibrant.
However when using the AppleTV playback is stutter/jittery every few moments and the content is all standard definition. Both form iTunes rentals, streaming from an iTunes library and netflix. and its not a streaming issue as I have another bottom of the barrel HDTV 1080p set with an ATV2 and it streams the content just fine no issues. (it performs the jitter/stutter/ when plugging it into the Samsung LEDTV)
I disabled Auto Motion Plus feature of the set and did no justification or stopped the jitter during playback. When I put the setting on Game Mode it played back just fine as per usual, however adjusting the color quality, picture qualiy etc is disabled and am not getting the full advantage of the LEDHDTV
Anyone experience this before? I've browsed through some of the posts and seems alot of complications between some ATV2's and Samsung TV's.

I found this on another forum. Set Samsung Auto Motion Plus to "Clear" NOT off. I also set the AppleTV TV resolution to 720p - 60 hz. Tried it last night on a DVD I ripped with Handbrake and streamed it from my iMac. Finally stopped the jitter. I think I saw one or two stray hiccups during the entire movie. But that's WAY better than the glitch every 4 or 5 seconds before.

System-wide video stutter problem

When I start a video chat with anyone it works well until some point when the computer begins to stutter as well as the video and audio from the video chat to the point that the computer becomes almost unusable. Once I close the video chat the computer comes back to normal. If I don't close the chat window then sometime later the green light on the iSight stops glowing and my side of the video on the chat gets stuck. At this point I can still see and listen to the other party and they can listen to me.
Other times this "bug" or whatever it may be called happens earlier in during the chat by having the video chat at the sime time as watching a video on Safari (youtube or any flash content). When this happens, both the iChat video and the Safari video start to stutter.
This has also happened while playing WoW.
I have tried reinstalling OS X 10.5 and it just comes back to haunt me.
Thanks for your help

I just reinstalled OS X 10.5 and still have the same problem. I would say it gets worse and worse. Last thing that happened was I was playing World of Warcraft and the computer just started to stutter, mouse, video, sound, everything an then it shut down. After reboot i got this error report:
Mon Nov 17 22:06:38 2008
panic(cpu 1 caller 0x0019CCE4): "simple lock deadlock detection: lock=0x5356a0, cpu=1, owning thread=0x8400048"@/SourceCache/xnu/xnu-1228/osfmk/i386/locks_i386.c:317
Backtrace, Format - Frame : Return Address (4 potential args on stack)
0x2e5fcdd8 : 0x12b0e1 (0x4555b4 0x2e5fce0c 0x133238 0x0)
0x2e5fce28 : 0x19cce4 (0x45cad8 0x5356a0 0x1 0x8400048)
0x2e5fce48 : 0x13393d (0x5356a0 0x340b7000 0x8eabf020 0x109)
0x2e5fce88 : 0x13fd3c (0x340b7000 0x39d78b8 0x1f3a0 0x3bc6bb4)
0x2e5fced8 : 0x199303 (0xa10dc680 0x109 0x39d65d0 0x0)
0x2e5fcf28 : 0x1a6c55 (0x0 0x2e2d75cf 0x0 0x191926)
0x2e5fcf78 : 0x1ae60e (0x45defc60 0x340b7000 0x2e5fcfa8 0x6)
0x2e5fcf98 : 0x4443c7 (0xde 0x45defc60 0x39d65d0 0x1)
0x2e5fcfd8 : 0x19e6de (0x45defc60 0x0 0x0 0x0)
0x45defd08 : 0x2e2d592d (0x4292400 0x14 0xf 0xc)
0x45defd48 : 0x2e2d6e52 (0x3d3f200 0x0 0x1 0x3d3f600)
0x45defd68 : 0x2e2d4360 (0x3d3f200 0x2e2d0740 0x9f3fd20 0x3d3f600)
0x45defda8 : 0x2e2ca312 (0x3d3f600 0x0 0x3d3f600 0x1991a6)
0x45defdf8 : 0x2e2c985d (0x3d3f600 0x45defe6c 0x45defe28 0x8c499620)
0x45defe38 : 0x2e2d3bb9 (0x3d3f600 0x45defe6c 0x45defe88 0x13ff64)
0x45defe98 : 0x2e2bd8b8 (0x3d3f600 0x429b920 0x1 0x45defee0)
Backtrace continues...
Kernel loadable modules in backtrace (with dependencies):
com.apple.driver.ACPISMCPlatformPlugin(3.0.0d11)@0x2e2d1000->0x2e2dafff
dependency: com.apple.iokit.IOPCIFamily(2.4)@0x2e318000
dependency: com.apple.driver.AppleSMC(2.0.0d5)@0x2e2ba000
dependency: com.apple.driver.IOPlatformPluginFamily(3.0.0d11)@0x2e2c3000
dependency: com.apple.iokit.IOACPIFamily(1.2.0)@0x2e32e000
com.apple.driver.IOPlatformPluginFamily(3.0.0d11)@0x2e2c3000->0x2e2d0fff
com.apple.driver.AppleSMC(2.0.0d5)@0x2e2ba000->0x2e2c2fff
dependency: com.apple.iokit.IOACPIFamily(1.2.0)@0x2e32e000
BSD process name corresponding to current thread: kernel_task
Mac OS version:
9A581
Kernel version:
Darwin Kernel Version 9.0.0: Tue Oct 9 21:35:55 PDT 2007; root:xnu-1228~1/RELEASE_I386
System model name: MacBook2,1 (Mac-F4208CA9)
If anyone understands what this means......
Thanks again

ITunes "stutter" when switching windows

This problem is a bit strange, so I'll explain it as best I can.
iTunes runs normally (albiet, slowly as usual, it IS still bloated iTunes) while I have its window selected, but if i click on the desktop, internet, or any other window and then click back to iTunes whatever song is playing stutters for a second, my mouse lags, and then everything returns to normal. Anything else continues running normally while this happens. My first thought was that I didn't have enough RAM, but 2gigabytes should be plenty to handle about a 1100 song library (no video, a few podcasts, no pictures). I have a 2ghz processor. The strangest part is, I noticed that, while importing a cd, I could switch from the desktop to the iTunes window without any stutter. The second importing stopped, however, the stutter began again. I'm completely stumped, anybody have any solutions or should I try to use WMP again?

Someone posted on problems with the Sophos virus checker yesterday if that is any use:
http://discussions.apple.com/thread.jspa?messageID=5216890&#5216890

Stutter, jitter, whatever.

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