Abismal Playback Performance

We've been trying out Premiere Pro CS3, and the first thing we notice is that playback of the timeline is horrendously choppy and uneven. Even for a project with a single clip in a single sequence and no effects. We've tried with a few different formats/codecs, and some relatively modest frame sizes such as 960x540. Premiere Pro 1.5 works perfectly fine, and Sony Vegas even plays back at full frame rate, so its most likely nothing to do with our systems. CS3 lags and surges and stutters so much it makes editing anything involving timing virtually impossible.
We'd be curious to know if anyone else has similar problems.
Regards,
Veronica

I hear you and have the same problem. You probabally should post what kind of system you are using, and your system specs.
I'm guessing to get really good quality, you need a Quad Core system, if using a PC.
I have always wondered, what professional video studios use as computer systems. Are these computers they use 100x more powerful than anything a home user would use ?
I have a friend who works with databases, and he tells me the computers they use have 32 gigs of ram, which, on home computers doesn't even exist, so I'm guessing video studios use something simular, perhaps with even more ram, on specialized computers ( not available to us ? )

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Get Better Playback Performance with Mercury Transmit | CS6 & Creative Cloud Feature Tour for Video | Adobe TV

Learn how Adobe Mercury Transmit gives Adobe I/O hardware partners, such as AJA, Black Magic Design,Bluefish444, Matrox, and MOTU, direct access to the Mercury Playback Engine, so you experiencebetter playback performance than ever before.
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please explain more detail such as what the hardware is and what it does and adobe should have small workshops similar to apple retail stores i get that you need special hardware but which one like what do i need to make playback run smoothly how do i make that line from nothing to red to yellow to green or blue someone respond quickly oh and what is mercury play back engine and murcurey transmit.

Could not measure video playback performance

Windows Experience Index stops with this message.
My Pc:
Asus m3n hd/hdmi, Phenom quad 9550, 2x1gb mem, Asus EngTX 260 (tried drivers from nvidia & asus), Win7 ent x64
Logfile:
131415 (0920) - winsat\logging.cpp:0815: --- START 2010\2\15 16:36:53 ---
131415 (0920) - winsat\main.cpp:4301: Command Line = "C:\Windows\system32\winsat.exe" formal -cancelevent 5592497f-0a37-4f1f-a1e8-3d8cc20675aa
131415 (0920) - winsat\processwinsaterror.cpp:0095: ERROR: tried to read resource strings, unknown exception occured
131758 (0920) - winsat\main.cpp:4474: > IsFormal=TRUE IsMoobe=FALSE.
131805 (0920) - winsat\main.cpp:4585: Watch dog system enabled
131805 (0920) - winsat\main.cpp:4600: Main watch dog timer set to 600.0 seconds
132273 (0920) - winsat\main.cpp:2505: > DWM not running.
132273 (0920) - winsat\main.cpp:2470: > EMD service will be restored on exit.
134316 (0920) - winsat\syspowertools.cpp:0983: > Read the active power scheme as '381b4222-f694-41f0-9685-ff5bb260df2e'
134316 (0920) - winsat\main.cpp:2793: > power policy saved.
134519 (0920) - winsat\syspowertools.cpp:1015: > Set the active power scheme to 8c5e7fda-e8bf-4a96-9a85-a6e23a8c635c'
134535 (0920) - winsat\main.cpp:2814: > power policy set to maximum.
136500 (0920) - winsat\logging.cpp:1763: ERROR: pahse enter/leave imballance
136656 (0920) - winsat\main.cpp:0948: > IsOfficial=TRUE IsFormal=TRUE IsMoobe=FALSE RanOverTs=FALSE RanOnbatteries=FALSE
136719 (0920) - winsat\main.cpp:1775: > Run Assessment features
136968 (0920) - winsat\main.cpp:1775: > Run Assessment dwm -aname DWM -time 10 -fbc 10 -disp off -normalw 12 -width 1280 -height 1024 -winwidth C(1144) -winheight C(915) -rendertotex 6 -rtdelta 3 -nolock
150587 (0920) - winsat\processresults.cpp:4018: > Wrote video memory bandwidth to the registry 44168100
150587 (0920) - winsat\main.cpp:2037: > DWM Assessment results processing SUCCESS
150587 (0920) - winsat\main.cpp:1775: > Run Assessment d3d -aname Batch -time 5 -fbc 10 -disp off -animate 10 -width 1280 -height 1024 -totalobj 300 -batchcnt C(10) -objs C(26) -rendertotex 6 -rtdelta 3 -texpobj C(1)
157514 (0920) - winsat\main.cpp:1775: > Run Assessment d3d -aname Alpha -time 5 -fbc 10 -disp off -animate 10 -width 1280 -height 1024 -totalobj 300 -batchcnt C(75) -objs C(26) -rendertotex 6 -rtdelta 3 -texpobj C(1)
164393 (0920) - winsat\main.cpp:1775: > Run Assessment d3d -aname Tex -time 5 -fbc 10 -disp off -animate 10 -width 1280 -height 1024 -totalobj 500 -batchcnt C(125) -objs C(20) -noalpha -texshader -totaltex 10 -texpobj C(4) -rendertotex 6 -rtdelta 3
171398 (0920) - winsat\main.cpp:1775: > Run Assessment d3d -aname ALU -time 5 -fbc 10 -disp off -animate 10 -width 1280 -height 1024 -totalobj 500 -batchcnt C(125) -objs C(20) -noalpha -alushader -totaltex 10 -texpobj C(1) -rendertotex 6 -rtdelta 3
178387 (0920) - winsat\main.cpp:1775: > Run Assessment d3d -dx10 -aname Batch -time 5 -fbc 10 -disp off -animate 10 -width 1280 -height 1024 -totalobj 300 -batchcnt C(10) -objs C(26) -rendertotex 6 -rtdelta 3 -texpobj C(1)
185469 (0920) - winsat\main.cpp:1775: > Run Assessment d3d -dx10 -aname Alpha -time 5 -fbc 10 -disp off -animate 10 -width 1280 -height 1024 -totalobj 300 -batchcnt C(75) -objs C(26) -rendertotex 6 -rtdelta 3 -texpobj C(1)
191912 (0920) - winsat\main.cpp:1775: > Run Assessment d3d -dx10 -aname Tex -time 5 -fbc 10 -disp off -animate 10 -width 1280 -height 1024 -totalobj 500 -batchcnt C(125) -objs C(20) -noalpha -texshader -totaltex 10 -texpobj C(4) -rendertotex 6 -rtdelta 3
198526 (0920) - winsat\main.cpp:1775: > Run Assessment d3d -dx10 -aname ALU -time 5 -fbc 10 -disp off -animate 10 -width 1280 -height 1024 -totalobj 500 -batchcnt C(125) -objs C(20) -noalpha -alushader -totaltex 10 -texpobj C(1) -rendertotex 6 -rtdelta 3
205422 (0920) - winsat\main.cpp:1775: > Run Assessment d3d -dx10 -aname GeomF4 -time 7 -fbc 10 -disp off -animate 10 -width 1280 -height 1024 -totalobj 150;200;241 -batchcnt C(50);C(200);C(300) -objs C(12);C(26);C(45) -noalpha -geomf4shader -texpobj C(0) -rendertotex 6 -rtdelta 3 -tierframes 60 -tiertime 1
214719 (0920) - winsat\main.cpp:1775: > Run Assessment d3d -dx10 -aname GeomV8 -time 7 -fbc 10 -disp off -animate 10 -width 1280 -height 1024 -totalobj 75;100;120 -batchcnt C(25);C(100);C(150) -objs C(8);C(17);C(29) -noalpha -geomv8shader -texpobj C(0) -rendertotex 6 -rtdelta 3 -tierframes 60 -tiertime 1
223892 (0920) - winsat\main.cpp:1775: > Run Assessment d3d -dx10 -aname CBuffer -time 5 -fbc 10 -disp off -animate 10 -width 1280 -height 1024 -totalobj 75 -batchcnt C(25) -objs C(8) -rendertotex 6 -rtdelta 3 -texpobj C(1) -cbuffershader -cbufa 2 -cbuff 5 -cbufp 6
230101 (0920) - winsat\main.cpp:1775: > Run Assessment mfmedia -input C:\Windows\Performance\WinSAT\winsat.wmv -nopmp
230335 (0920) - media\mediaerror.cpp:0151: mfmediatest.cpp @ 984: 0x800700ea == ERROR_MORE_DATA
230335 (0920) - media\mediaerror.cpp:0151: mfmediatest.cpp @ 360: 0x800700ea == ERROR_MORE_DATA
230335 (0920) - media\mediaerror.cpp:0095: Error: Could not resolve the input file. (Is it present, and of a correct format?)
230351 (0920) - winsat\main.cpp:2056: > mfmedia Assessment FAILED due to an error
230429 (0920) - winsat\processresults.cpp:4018: > Wrote video memory bandwidth to the registry 44168100
230460 (0920) - winsat\processresults.cpp:1241: Skipping Graphics video playback time limit check.
230460 (0920) - winsat\processresults.cpp:1253: Skipping StdDefPlayback limit check.
230460 (0920) - winsat\processresults.cpp:1265: Skipping StdDefPlayback limit check.
230460 (0920) - winsat\processresults.cpp:1480: > Wrote disk score to the registry 0
230507 (0920) - winsat\syspowertools.cpp:1015: > Set the active power scheme to 381b4222-f694-41f0-9685-ff5bb260df2e'
230522 (0920) - winsat\main.cpp:2855: > Power state restored.
230522 (0920) - winsat\main.cpp:2870: > Successfully reenabled EMD.
230819 (0920) - winsat\main.cpp:2896: > Composition restarted
230819 (0920) - winsat\watchdog.cpp:0311: Watch dog system shutdown
230819 (0920) - winsat\main.cpp:4909: > exit value = 1.
file winsat.wmv is playable with all players installed (WMP & WMC plays it & other video files in perfomance folder).
Setting maximum permissions for folder & files for all users & system accounts dont bring anyresult.
I dont have Kaspersky antivirus on pc
Datastore folder is cleared, don't working too. (maybe anyone can share this files, cause i fully deleted them from disk)
Then, with Win7DS tweaker i restored settings to win defaults. the same
Then i completley uninstall K-lite. Not working....
Index was never computed on this OS (I didn't run it without drivers for MB & Video card)
Any ideas?
PS Sorry for my poor expirience in english, i hope my message is understandable
Sorry for the crossposting

Hi Xopek1,
You may perform an In-Place upgrade to repair the system and run Windows Experience Index again.
In-place Upgrade
============
1. Start the computer.
2. Insert the Windows 7 DVD in the computer's DVD drive.
3. Use one of the following procedures, as appropriate:
a. If Windows automatically detects the DVD, the Install now screen appears. Click Install now.
b. If Windows does not automatically detect the DVD, follow these steps:
b1. Click Start, click Run, type Drive:\setup.exe, and then click OK. Note Drive is the drive letter of the computer's DVD drive.
b2. Click Install now.
4. When you reach the Which type of installation to you want? screen, click Upgrade to upgrade the current operating system to Windows 7.
What’s the result?
Regards,
Arthur Li - MSFT

Poor Timeline Playback Performance

I am using Premiere Pro CS4 (version 4.2.1) to edit some footage from my Canon Vixia HG20 (AVCHD). While previewing the clips in the source monitor, they play flawlessly, but as soon as I drop the same clip on the timeline, the playback is very slow. I have maybe 10 clips from the camera on the timeline. The first second or two plays fine, then it starts dropping frames. After about 8 seconds, its playing at one frame a second, and before long the playback just freezes. This makes the program nearly unusable in that I can't edit with performance like this. All of these clips play fine in the source monitor.
I am using Premiere Pro CS4 on a MacBook Pro running 10.6.2 (Snow Leopard). 2.4 gHz Intel Core 2 Duo with 4GB of RAM. Premiere is installed on a 7200RPM hard drive and all the footage is on another 7200RPM drive (both with plenty of space; the second drive is the scratch disk).
I've look for solutions in the forums and online, but haven't found many suggestions directed at Mac users. I've looked at optimizing my system for Premiere, but it didn't seem to have much noticeable difference. Any further suggestions would be greatly appreciated!

Thanks for the suggestions everyone. Sadly, being a college student, I don't have a budget to start building a new machine just quite yet, so I need to work with what I got.
I'm posting my solution to the problem just in case someone else is having the same issue.
Because using the original footage was just too slow on my machine, I decided to give proxy footage a try. I downloaded Wondershare Converter (for Mac computers) to convert AVCHD to a standard def quicktime file. The trial version of the program places a giant watermark on the video, but because I'm just using this for cuts and general edits, I don't really care about the watermark.
Once I got all the footage converted, I used a Terminal command to batch rename all the files with the .MTS extension. I placed this footage into its own folder separated from the original. Then I flip-flopped the names of the folders to Premiere was now pointing to the proxy footage. I made all my edits, saved and quit, flip-flopped the folder names back to their original and reopened Premiere. Viola! HD footage cut to perfection! :-)

Poor Mercury Playback Performance - Quadro FX3800

Hi guys,
I just bought a brand new Quadro FX3800 in hopes of using the Mercury Playback Engine in Premiere Pro CS5.
I just had it installed and tested it and although I can use it, its extremely jerky and choppy and then it crashes the program.
I have 16GB RAM installed in a Win7 64, and Quad Core Q9550 running at 2.83Ghz.
Is there something I'm doing wrong? I've installed the latest drivers.
Thanks so much for all your help and advice on how to get the Mercury Engine working for me.
Mark Shian

prismshian,
The Quadro FX 3800 isn't that fast of a GPU by today's standards. In fact, it's now three GPU generations old, being based on a cut-down GTX 260 with only a 256-bit DDR3 VRAM bus instead of the 448-bit VRAM bus used in the GTX 260 itself. With such specs, expect it to be slower than even a cheapo GTX 550 Ti.
Same thing with your system's Core 2 Quad Q9550: I had the Q9450 (its slower-clocked brother, running at 2.66GHz instead of 2.83GHz). If my results in the PPBM5 results list are any indication, expect even the Q9550 (unless heavily overclocked) to perform slower than even a cheapo dual-core i3-21xx (with all other components identical between the two systems). If my i3-2100 dual-core can achieve a result of 500-ish seconds in PPBM5, don't expect a stock-speed Q9550 to be any faster than about 600-ish seconds in that same PPBM5 benchmark.
So in other words, for performance that's meaningfully faster than your current setup equipped with the GPU that you had prior to your wasting money on that FX 3800, you will need an entire new build altogether. In fact, with the amount of money that you wasted on that FX 3800 by itself, you could have purchased most of the guts of an entirely new, modern Ivy Bridge quad-core build (namely, an i5-3570K CPU, a good Z77 motherboard, 16GB of DDR3-1333 or DDR3-1600 RAM, a 500GB HDD plus a 1TB HDD and a GeForce GTX 560 Ti).

XAVC 4K playback performance on Mac Pro

2009 Nehalem 2.66GHz 8-core Mac Pro with 16GB RAM and GTX570, running OS X 10.8.5.
As part of my freelance post work, I've started tackling 4K XAVC-I footage from the Sony FS7. The footage loads alright, but is impossible to play without serious stuttering. Brand new project. I tried any playback resolutions between full and 1/8, same behavior. I can't play a single second without the drop frame indicator going orange and starting to rack up dropped frames.
CPU utilization during playback is steady at 70%, and drive reads are at 80MB/s (our SAN successfully delivers 350MB/s).
Tried both Premiere CC and CC(2014), same behavior.
Performance in DaVinci Resolve doesn't look much different.
It's going to be a week or so before I'm back at the machine, so I'm preparing my attack plan. "Gotta buy a new computer" is the easiest possible answer but also the most expensive (we can all predict the boss` reaction) and not necessarily accurate one. Maybe it is the right one, but part of my job is to eliminate other possible (and cheaper) causes first.
What is the current state of 4K playback in Premiere? Is it two camps of "always worked for me" and "never works for me"? Has anyone had playback issues that were fixed by updating CUDA drivers, Premiere patches, identifying odd bugs, etc.?
I'm going to play with the video output, Mercury settings, source drive, and transcode to 4K ProRes at different bitrates... any other suggestions?
We all know that the new black Mac Pro "can do 4K", but I haven't heard a statement that "no other Macs can". Surprisingly, I haven't found discussions (let alone official recommendations) of minimum hardware requirements for Premiere and 4K. I'd be happy to be pointed to any if they exist. The CPUs in this 2009 Mac Pro should still pack more punch than any iMac model in the market, and is 25% slower than the baseline 2013 MP. If it's the GPU, I'd be happy to hear at least one testimony like "never worked with my GTX570 but once I went GTX680 I finally set sailing".
Thanks!

I use a Sony Notebook with 4 K Display and a USB 3 disk 2TB with footage from the FS 7, sequence lenght 3 hours and I have no problems. All is working very well.

HD Video Playback performance in LR 4.3 - help!

Colleagues,
I'm a new LR user but experienced video editor. I am exporting video from Final Cut Pro 7 and importing these files into LR4.3, renaming and applying metadata during import. I'm not doing any develop work on the videos, that's all been done in FCPro.
This is my work, not fun, so your help is very much appreciated:
I'm running LR4.3 on:
OS Mac 10.6.8 laptop
Processor is 2.16 GHz Intel Core 2 Du0
4 GB 667 MHz DDRS SD RAM
128MB RadeonX 1600 card
120GB Hard drive with 25BG free.
I know this gear is old. But it copes fine with massive projects in Final Cut Pro 7.
Catalogue and data live on a 12TB 4Big Quadra LaCie Drive connected by Firewire 800 to laptop.
Preview.lrdata and all presets live in same folder on Quadra as the catalogue file.
I'm having no trouble playing back 780x576 SD Video in LR4.3 (I'm on PAL as I'm in Australia btw)
I'm having a hard time playing back 1920x1200 or 1440x1080 HD video. The playback just hangs or is very jumpy. Doesn't matter if the file size is 30MB or 250MB, same problem. My clips are not more than 60sec long.
I am using one catalog which looks at several folders.
These files play fine in Quicktime.
I have trying moving my physical data to the Desktop/hard drive but same problem.
I have tried creating a new catalog and reimporting files. Same problem.
I regularly optimize and back up the catalog.
I've unchecked the video cache size in file handling preferences.
I close down all other software when running LR.
I close down Histogram and Navigator and any other stuff I don't need in LR.
I have recreated metadata and filename presets in a new catalog just in case these were corrupt
.. all to no avail. My HD videos just do not play back smoothly.
If you are an expert/s, could you please tell me:
Is it my hardware?
Could it be a codec problem?
Is there a correct/best codec for LR HD video import files?
I know my hardware is old - what do you recommend for Mac?
Is anyone else out there importing files which have exported from Final Cut Pro?
Are you by chance importing HD video from Canon 5D/7D cameras (something else I have to do). If so, are you having any playback problems with this as well?
Thanks for any assistance you can provide,
Best wishes,
Kez

Thanks for the info. I find it frustrating because I thought I left it long enough to generate previews. I am going to try marking all of the files I want to delete before actually deleting them. This way when I get to the renaming/keywording phase I will have fewer files for it to deal with and hopefully it will be faster.
Phil

Issue with HP Z820 64GB RAM and dual Quadro K4000's and rendering and playback performance

I'm having major issues with performance on my system (running windows 8.1. Premiere CC 7.2.2). My friend in the office here has a Mac Pro (2013) with 6 core cpu and dual D500's and I have dual Xeon 2665's and dual K4000's.
The problem is that he can export twice as fast as me on mercury software and almost 3 times faster on Mercury GPU. He can also add twice as many affects before his system drops frames (using same settings and video file). When I go to GPU-Z my gpu's are hardly working with GPU export selected... with software only my CPU's get to 60% load max whereas his CPU get's to about 84%. Am I missing something? I know the D500's are almost the same as W8000's (and he has two), but dual K4000's shouldn't be that far behind? And how does selecting cpu exporting get him an export time of 6 minutes compared to my 15 minutes when I have a 32 threads to work with??
Am I doing something wrong? Have I got a setting somewhere that is causing this that I might have missed? Are dual D500's really THAT much better than dual K4000's? AND HOW is my 7k+ machine that much worse than his £3200 mac?
Please help. I'm losing my mind here!
Thanks
Edit - Would just like to add that the video files we are using are pro res 422 and that I have the latest bios and latest nvidia performance drivers

That HP Z820 should kick the Mac pros butt! For example we run Autodesk Flame systems ( 150k software) on the Z820's with Quadro 6000 cards and they fly. We also had a new mac pro in for testing a few months ago w the dual fire pro cards all decked out and it was crap next the the Z820. Of cource the new MP cant run allot of highend software because of its lack of nvidia support and the firepros lack of open GL but we did run premier and smoke etc on it for testing. ( Although i thought it looked cool the total lack of exandability and nvida support was to much so we sent it back). Graphic workstations need PCIe expandability and a choice in GPs.
Anyhow here are a few observations:
-Software being used will dertermine the hardware purchased,
-The dual xeons at the much lower clock speed are meant to work 24/7 like a lamans endurance race, not a sprint race. Better to get highest frequency xeons.
-Having dual CPUs with all thoughs cores will only work with a software that is properly mulithreaded, premier is definetly not one of those softwares so you not getting any advantage.
- the advantage to Quadro cards are much more noticable in 3d tha 2d. If your running Autodesk maya, 3ds max or the recently disscontinued XSI you would be flying compared to the W7000.
-dual GPU cards do not preform at twice the speed. On average the second card gives about a 10 percent boost.
-At present ( and as akways) , nividia Quadro drivers are much more uptodate and bug free compared to ATI highend cards. This will inevitably change as openCL over takes openGL, until then Quadros are the clearly superior cards for those with DEEP pockets.
-I think you would have been far better off with a single Quadro 6000 vs dual K4000s. Also any higher end ATI firepro card would have worked since Premier now uses open CL and no longer needs openGL. Main advantage to Quadro at this point ( besides 3D ) is to be compatible with the most softwares and get the best and most optimized drivers. Firepros will work properly in far fewer softwares at this point but I can see a day over the next few years this may change but not as of yet in 2014. So his W7000 wins this sprint race in this single simple example but in most any other situations your cards will actually work and win. I like saving money like the next guy but I even purchase Quadro cards for my home use and experimenting, but Im not a gamer.
-FYI: Cuda core count no longer is true measure. For example older Fermi cards worked at twice the frequency than the newer kepler architecture so in effect today you need double ( actually more) the amount of cuda cores to equal the older cards. Also the true compute power in the new Keplers is also much inferior to the older cards. Its all creative advertiseing today more akin to creative accounting / smoke and mirrors. What im trying to explain is when people read the charts that show the cuda core count and say the higest is best is completely not true. It may have the most "cores" but it will not render correctly, double percision is missing, colors may pop, anti aliasing is inferior and inconsistant, interaction ( most important) and shaders will be buggy or missing. There are very good reasons people spend money on highend Quadro cards but the charts and reviews generically speaking never understand or can even test for this stuff.
-Even given the above scenarios your Z820 should be killing your competition. Using a decked out Z820 is way overkill for anything CC. ( Kinda like driving an F1 to get groceries.) get your HP rep to come over and replace / test your rig. Its free and covered in your coverage.
I am CLEARLY not a tech guy as my talent in is creation and design but I overhear the tech guys talking.

Mpeg 4 - poor playback performance since Tiger/QT7

Hello!
Since my Update to Tiger/Quicktime 7 my .mp4 movie playback is very slow - from 0,02 fps to a few fps. I tried a lot of movies - with the same results.
Movie size is 720xabout450, Audio AAC, Video Mpeg 4 (made with 3ivx - mp4-compatible).
With Panther/QT6 with or without the 3ivx QT plugin everything worked fine.
Removing all 3rd-party QT-plugins (incl. 3ivx) didn't help.
System is iBook G3/800, 640 MB RAM.
Any idea?
No.

I've found that movie playback in QuickTime 7 takes about 5% more CPU time than it did in QuickTime 6. That's 5% regardless of the codec you use. While that may not sound like much, if you were previously close to the edge of acceptable playback this change can make a surprising difference in results. You can go from mildly choppy playback to something that might occasionally fall to one half of your previous frame rate. In some cases it's not a slowly decreasing playback quality, but more like falling off of a ledge.
You might also want to investigate to see if any background tasks are running that weren't present under Panther. Widgets would be the first thing to check. They shouldn't be a problem until you've launched Dashboard for the first time after a reboot, but thereafter they can cause problems (normally nothing to worry about, but I have seen a few cases of "runaway" widgets).<small><hr width="75%"><small>If this suggestion helps in any way, a confirmation or acknowledgment would be appreciated, since that would also help others who may be having the same difficulty. Do for others as you would have them help you.<center>Thanks for sharing, Waymen.</center></small>

Itunes playback performance issue

All my iTunes library files are kept on the Airport extreme and so every time I play a movie, it skips, stutters, loses sound here and there, it's getting quite annoying. I noticed that if a movie is projected to the big screen using apple TV, it will buffer like a youtube video and plays absolutely fine. Also, if I go directly to the folder and right-click on the file, play with VLC, there is no problem. It would appear to me that the problem is with iTunes' playback of videos on my Airport Extreme.
Does anybody have the same problem and is there a solution?

I can only offer you a sympathetic shoulder to cry on.
I'm not using an air disk. I'm using a hard drive on an old G3 that I use to serve my music library to my laptop as a wander throughout the house. I have it set up this way because I also have the G3 hooked up to a stereo system that can pump music to various locations of the house. So both machines need access to the library, as well as the playlists, rating histories, playback counts, etc., so that my smart playlists can have the same data to work from.
Anyway, I'm having this same issue. Both computers are constantly wanting to scan for gapless playback. I've let them both finish scanning my entire library numerous times, but it doesn't help, they want to scan it again and again, every time I launch iTunes. If I cancel the process, it will likely try to start again a few minutes later.
This only happened after I installed iTunes 9. I'm ripping my hair out over this issue. Give me back the music library that I know and love please.

Which one is better for playback/performance - iMac or Mac Pro?

I'm getting a new mac and I don't care that much about the render time as I do about being able to play back my effects in real time. I know that both the $1500 iMac and the Mac Pro would work with Premiere and I'm pretty sure I won't have any problems with the Mac Pro but obviously I'm on a budget so my question is - will the iMac be able to handle effects in real time without the need for me to render first?

It makes no difference whatsoever.

YouTube App Video Playback Poor Performance

Not sure when or what changed but video playback performance on my iPod Touch 4G when using the YouTube app has been very poor the last couple months. Used to work just fine. The performance has been so bad that I basically gave up watching YouTube videos on my iPod. By bad performance I mean it would literally take 10 minutes to watch a 2 minute video (estimating of course). And I would get chunks of about 20 seconds before I had to wait while the video would buffer again.
I know this is due to my connection speed as video playback using the YouTube app at other locations that have a faster speed still worked fine.I think my home connection is up to 5 MB download but I actually only get around 4 MB. But still, this should be just fine as it used to work. Also, NetFlix and FaceTime work just fine at home. The YouTube app should be able to determine the video quality based on your connection for streaming. But it now longer seems to do that.
Talked to Apple tech support and they had me reset my iPod which did not help. But they had me try using Safari instead of the YouTube app. By using Safari and going to YouTube.com video playback on my iPod Touch was just fine. Videos would buffer more quickly then they would play. Even if I left HQ on, video playback was fine. Go figure? Something definitely seems wrong with the YouTube app.
So I thought I'd post this in case anyone else was searching for a solution. This works for me.
Seems like the YouTube app needs to be updated. Mentioned this to Apple tech support but was told Google would be responsible for that and they doubt it will be done due to YouTube no longer using flash. Hmmmm, the app seems pretty integrated into iOS as the app comes installed and can not be uninstalled.

See:
iOS: Troubleshooting applications purchased from the App Store
Try when connected to another network to help determine if it is a network problem
Contact the developer/go to their support site if only one app.
Restore from backup. See:
iOS: How to back up
Restore to factory settings/new iPod

Voice Memos playback when not in foreground?

Can the Voice Memos app be configured to play when it is not in the foreground?
By default, if Voice Memos is playing a recording and I press the Home button to get to another app, playback immediately ceases.
Thanks.

Hey raymondgauthier,
Thanks for using Apple Support Communities.
Looks like you are having trouble with the playback performance unsing airplay. This article provides steps for troubleshooting performance issues.
iTunes: Troubleshooting AirPlay and AirPlay Mirroring
http://support.apple.com/kb/ts5209
Have a nice day,
Mario

Why am I unable to playback a movie in my library

why am I unable to playback a movie shown in my library

Hi there jcrod,
You may find the troubleshooting steps in the article below helpful.
Troubleshooting iTunes for Windows Vista or Windows 7 video playback performance issues
http://support.apple.com/kb/ts1718
-Griff W.

Performance problems with external sounds and Sound class

I'm using Sound & SoundChannel classes to load and play external MP3s and I'm seeing terrible playback performance on my 3G phone. Audio starts out ok, but will gradually get more and more choppy and eventually crashes the app. The MP3s themselves are typical sizes, 2 - 6 MB and of various types (VBR, CBR).
On top of that, when the phone gets locked (with the app still running), the audio sputters and stops completely. When I unlock, it begins where it left off. Anyone else seeing this?
My code is pretty standard:
private var soundPlayer:Sound;
private var soundChannel:SoundChannel;
public function load(url:String, playNow:Boolean = true):void {
if (soundChannel) {
    soundChannel.stop();
soundPlayer = new Sound();
soundPlayer.addEventListener(IOErrorEvent.IO_ERROR, onIOError);
soundPlayer.addEventListener(ProgressEvent.PROGRESS, onProgress);
soundPlayer.addEventListener(Event.ID3, onID3);
trace('Loading new stream: '+url);
var request:URLRequest = new URLRequest(url);
soundPlayer.load(request);
if (playNow) {
    this.isPlaying = true;
    soundChannel = soundPlayer.play();
    soundChannel.addEventListener(Event.SOUND_COMPLETE, onSoundComplete);

this is from another forum (http://discussions.info.apple.com/thread.jspa?threadID=2542931&tstart=0&messageID=12106188 ):
"I've spoken to the developers of of couple of these apps, and they've all said it's a memory fragmentation/low memory condition.
Restart the phone. Don't just turn it off and on, but restart it.
Hold the on/off button and the home button down like you were going to turn it off. When you see the swipe to turn off message, keep holding the buttons down.
In a few seconds the screen will flash, and then go dark.
Now it's really off.
Turn it back on (restarting it). All should be well.
The iPhone is really a computer. Performing a restart like this every once in a while (weekly, bi-weekly) is a good idea, esp if you use memory intensive apps."
coop

Abismal Playback Performance

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