Choppy video playback/loosing frames.

I've had my iMac G5 for about a year and a half but for the 5-6 months i've noticed that Quicktime movies (My quicktime movies that i've made myself and are stored on my hd) can't be played back without them loosing frames or being "choppy" - it eventually catches up - but I may have lost an entire sentence from the person in the video - this happens with any videos I watch - not just quicktime - stuff on iTunes, recordings from EyeTV do this also - not as much - but these are usually Mpeg-2 and are recording in the best quality option possible.
although if i'm watching TV from EyeTV, I have no problem - or if i'm importing video into iMovie - no problems - it's playback that does this.
it's almost as if i'm watching a streaming clip on the internet - with a bad connection. but these videos are mine - saved to the computer.
my iMac is a 2nd generation with the ambient light sensor, and I have 1 GB or Memory - I don't know what else you may need to know about my computer model - but if you think you can help, but need more info - just ask!
thanks.

Choppy video like you describe is almost always caused by too many demands on your hard drive. EyeTV works fine when watching live TV because Live TV is not written to or read from the hard drive.
The most common cause of this would be that your hard drive is too full. For best performance, try to keep at least 15% of your hard drive space free. This gives the computer some room to breathe. If your drive was severely fragmented, it may take awhile before movies will play properly again.
You may have too many programs open. This could cause the computer to use more virtual memory, which increases hard drive usage. In addition, running another disk-intensive program can cause movies to skip.
You may have a performance problem with the drive. If you have multiple hard drives, try playing the movie from another drive.
You may have a filesystem structure issue on a drive. In some cases, these issues can result in poor performance. Run Disk Utility to test the drive. Any number of other common system fixes (repair permissions etc.) may help with this as well.
MacBook Mac OS X (10.4.8)

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I see that you are experiencing an issue with choppiness while AirPlay Mirroring from your computers to your Apple TV. I have an article that contains some helpful troubleshooting steps for you regarding this issue:
About AirPlay Mirroring in OS X - Apple Support
http://support.apple.com/en-us/HT201343
Optimizing image quality
Resolution matching modes
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Regards,
Braden

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You could have a problem with your external drive. Run diskutility: diskrepair and diskwarrior (if you've got it) on it Is it formatted macosextended?   You might run a drive speed test and see if the drive is running up to spec.
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Check the version in the Application Folder!
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Navigate to /Library/QuickTime/
Move all plug-in ".component" files from the folder (to the Desktop, for instance)
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Restart your Mac.
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QuickTime plugin.plugin
Quicktime plugin.webplugin
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Re-install the Quicktime 7.5 update
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Download from the Download page on the Apple site the correct version of Quicktime 7.5 for your Mac.
Install it and restart your Mac. Repair permissions.
3 If still no luck, it is time to look carefully at your plug-ins and add-ons. The safest way is to download and re-install all of them. The ones you need in order to see and hear virtually everything the web has to offer are:
RealPlayer 11 (which is no longer in beta) for Mac from:
http://www.versiontracker.com/dyn/moreinfo/macosx/15540
Flip4Mac WMV Player from http://www.microsoft.com/windows/windowsmedia/player/wmcomponents.mspx (Windows Media Player for the Mac is no longer supported, even by Microsoft)
Perian from http://perian.org/
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Adobe FlashPlayer should first be uninstalled using the appropriate uninstaller available here: http://kb.adobe.com/selfservice/viewContent.do?externalId=tn_14157&sliceId=2 and then the latest version obtained from here: http://www.adobe.com/shockwave/download/download.cgi?P1ProdVersion=ShockwaveFlash and installed.
(You can check here: http://www.adobe.com/products/flash/about/ to see which version you should install for your Mac and OS.)
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Now go to Safari Preferences/Security, and tick the boxes under Web Content (all 4 of them) to enable Java.
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Important: Now repair permissions and restart.
There is an additional 'fix' you could try if you are having problems with Flash and Quicktime, depending on which type of Mac you have:
On Intel Macs, make sure that you are not running Safari in Rosetta. You can check this, and change it, in the Get Info window.
On PPC Macs, go to the Hard Disk/Library/Internet Plug-Ins folder, and drag the file 'QuickTime Plugin.webplugin' to the desktop. Quit and restart Safari. If things have improved you can trash that file. If they haven't put it back, as the lack of this plug-in can cause QT content in some widgets to cease functioning.
If none of the foregoing worked, then you should consider and archive and install before repeating all of the above.

Choppy video playback

I am creating a video jukebox application that must play a
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music collection while the video plays. The video plays in a video
display component and because I need to display a lot of picture
data (for the album art of each video) at once I am using a tile
list with an item render to display the artwork. This tile list
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4 down). However I have a very serious problem when I want to
scroll up/down through content of the tile list if there is a video
playing as it will cause my video to skip/stutter/become choppy
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My album art is loaded from a local sqlite database which
simply contains strings pointing to where each album picture is
located on my local C drive. All my pictures are jpeg's and are all
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I have tried reducing the number of pics displayed in the
tile list at any one time to as little as 6 (3 across and 2 down)
and have found that this greatly reduces the frequency of the skips
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scrolling quickly up/down through the tile list.
I have also tried to use a different approach to displaying
the album art as apposed to the logical tile list component. I have
made a standard panel into which I placed 6 blank image components
which act as containers, into which I simply load the first 6
results of an sql query and when the user clicks the down button it
loads in the next 6 - a bit crude but I thought it might work......
unfortunately it didn't and I got the same problem as I did when
scrolling through the tile list!
I have also tried reducing the quality/size of all of my
images but have found that this too makes very little difference
(if any) to my problem.
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memory I upgraded the RAM in my PC to 6GB and still found no change
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My PC is a Dell Optiplex GX745 with a 3.2GHz Intel Celeron
CPU and I'm running Windows XP SP2.
Can anyone please help me I'm really lost as to where to go
from here?
Thanks
Adam (Flexchief)

Hello Flexchief,
is it possible for me to look at your code? you can email me
at yankeedoodles at hotmail.com
Cos the first thing that I would think about is trying to
replace the flash scroll component with a home made scrollbar. This
has helped me alot.
Next, the flv playback might be looping for some reason. I
did a video juke box such as yours sometime back and I found out
that I was actually relaunching the video multiple times on click.
This caused the video to be laggy. It was harder for me to
determine as mine was audioless so i couldnt really tell that a
video was looping behind my already playing video.
Maybe you might want to consider some of the most primitive
things that are often overlooked..it happens to me alot.
Please do keep us all updated
Murtaza

Choppy video playback/loosing frames.

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