Dvd playback poor quality on new iMac

Upgraded from 2006 iMac 24" to a new iMac 27" / 2.9 Ghz, nVIDIA GeForce GTX 660M Graphics (512MB), with external Superdrive. My old iMac played standard DVDs with very good quality at full screen. The new iMac plays standard (commercial) DVDs but the video quality is poor, inferior to the old model. Is this due to the graphics card, or just a reality with the Retina display on this iMac, or some other reason? Do I need to purchase a Blu-ray player and third party playback software to get better resolution?
Thanks.

Yes regular DVD's were not intended to display in higher resolutions. You can try decreasing the screen resolution while watching these movies then changing it back. Or go with Blu-Ray and 3rd Party Software.

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What is the best CD and DVD to use with my new iMac Intel?

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Processor and memory
2.0GHz Intel Core 2 Duo processor
4MB shared L2 cache at full processor speed
667MHz system bus
1GB (2x512MB) of PC2-5300 (667MHz) DDR2 memory
Two SODIMM slots support up to 3GB
Storage
160GB Serial ATA 7200-rpm hard drive
Optional 250- and 500GB Serial ATA 7200-rpm hard drives
Slot-loading 8x SuperDrive (DVD+R DL/DVD±RW/CD-RW)
- Writes DVD+R DL discs at up to 2.4x speed
- Writes DVD-R and DVD+R discs at up to 8x speed
- Writes DVD-RW and DVD+RW discs at up to 4x speed
- Reads DVDs at up to 8x speed
- Writes CD-R discs at up to 24x speed
- Writes CD-RW discs at up to 16x speed
- Reads CDs at up to 24x speed
Communications
Built-in 54-Mbps AirPort Extreme Card (802.11g standard) (2)
Built-in Bluetooth 2.0+EDR (Enhanced Data Rate) module
Built-in 10/100/1000 BASE-T Gigabit Ethernet (RJ-45 connector)
Works with 56K V.92 Apple USB Modem (sold separately)
Display
Built-in 17-inch (viewable) widescreen TFT active-matrix liquid crystal display
Millions of colours at all resolutions
Typical viewing angle:
- 140° horizontal
- 120° vertical
Typical brightness: 250 cd/m
Typical contrast ratio: 500:1
Graphics and Video
ATI Radeon X1600 graphics processor using PCI Express
128MB of GDDR3 SDRAM
Mini-DVI output port with support for DVI, VGA, S-video and composite video connections via adaptor (3)
Built-in iSight camera
Support for external display in extended desktop
- Digital resolutions up to 1920 x 1200
- Analogue resolutions up to 2048 x 1536
Support for external display in video mirroring mode
Electrical and environmental requirements
Meets ENERGY STAR requirements
Line voltage: 100-240V AC
Frequency: 50Hz to 60Hz, single phase
Maximum continuous power: 180W
Operating temperature: 10° to 35° C (50° to 95° F)
Storage temperature: -40° to 85° C (-40° to 185° F)
Relative humidity: 5% to 95% non-condensing
Maximum altitude: 3,000 m (10,000 feet)
Size and weight
Height: 43.0 cm (16.9 inches)
Width: 42.6 cm (16.8 inches)
Depth: 17.3 cm (6.8 inches)
Weight: 7 kg (15.5 pounds) (4)
Peripheral connections
Two FireWire 400 ports; 8 watts shared
Total of five USB ports: three USB 2.0 ports (up to 480 Mbps) on computer, two USB 1.1 ports on keyboard
Audio
Built-in stereo speakers
17-inch and 20-inch models
Internal 12-watt digital amplifier
24-inch model
Internal 24-watt digital amplifier
Headphone/optical digital audio output (minijack)
Audio line in/optical digital audio input (minijack)
Built-in microphone
Thats the full spec of my iMac Intel duo core, plus added memory. As per the sellers website. The bit about the superdrive is pure fantasy. Have tried to copy and burn to DVD -R, +R and -RW all go through the motions and keep you in suspense. Then you put the disc in another player and disc not recognised. Really, really upset by this.

DVD Playback - Image Quality Issues...

I'm curious to know if others are experience sub-par image quality when playing standard DVDs in the iMac with a 24" screen. The picture of the DVDs is sub-par compared to playback of the same DVD on a regular TV monitor. Also, playback is jumpy and or pixelated (looks like digitizing errors) despite the DVD being new and which plays back normally on a typical DVD player and TV monitor.
Is anyone having similar issues? My computer is new, so this seems odd...

Hi AM249
Welcome to Apple Discussions
SuperDrives are way more senitive that tray load players, is the DVD scrached or dirty?
Dennis

Why are burned DVD's poor quality from the IDVD?

I made a slideshow in iphoto and exported to IDVD so I could burn copies. The show lloked great on screen but the first copies on dvd's were terrible. The quality of images are very poor and seem to be depixilated? Why would the copies be so poor? Does the widescreen or standard have something to do with it??
Help

Hi
There are levels in h*e*l*l*
iDVD - is same as DVD Standard - Interlaced SD-Video
Feeding iDVD progressive or HD material will not improve result but degrade this as from
- iMovie'08 to 11 - as they can not deliver - but only every second line of the picture
- iDVD downscaling from HD - is doing a bad job
So by using a program that can deliver - best possibly DVD is the result
- iMovie HD6
- FinalCut any version
- FotoMagico™ - (for SlideShows)
If this is not enough - then DVD is no option as HD-DVD is rare and needs special HD-DVD-players - alt
• Blu-Ray e.g. from Roxio Toast™ but still needs BD-Player as PlayStation3 etc
• out in high quality to USB-memory to be played on device that can do this
• Play via MacBook and out to a HD-projector/TV
DVD quality
1. iDVD 08, 09 & 11 has three levels of qualities. (version 7.0.1, 7,0.4 & 7.1.1) and iDVD 6 has the two last ones
• Professional Quality
(movies + menus up to 120 min.) - BEST (but not always for short movies e.g. up to 45 minutes in total)
• Best Performances
(movies + menus less than 60 min.) - High quality on final DVD (Can be best for short movies)
• High Quality (in iDVD08 or 09) / Best Quality (in iDVD6)
(movies + menus up to 120 min.) - slightly lower quality than above
Menu can take 15 minutes or even more - I use a very simple one with no audio or animation like ”Brushed Metal” in old Themes.
About double on DL DVDs.
2. Video from
• FCE/P - Export out as full quality QuickTime.mov (not self-containing, no conversion)
• iMovie x-6 - Don't use ”Share/Export to iDVD” = destructive even to movie project and especially so
when the movie includes photos and the Ken Burns effect NOT is used. Instead just drop or import the iMovie movie project icon (with a Star on it) into iDVD theme window.
• iMovie’08 or 09 or 11 are not meant to go to iDVD. Go via Media Browser or rather use iMovie HD 6 from start.
3. I use Roxio Toast™ to make an as slow burn as possibly e.g. x4 or x1 (in iDVD’08 or 09 this can also be set)
This can also be done with Apple’s Disk Utilities application when burning from a DiskImage.
4. There has to be about or more than 25Gb free space on internal (start-up) hard disk. iDVD can't
use an external one as scratch disk (if it is not start-up disc). For SD-Video - if HD-material is used I guess that 4 to 5 times more would do.
5. I use Verbatim ( also recommended by many - Taiyo Yuden DVDs - I can’t get hold of it to test )
6. I use DVD-R (no +R or +/-RW) - DVD-R play’s on more and older DVD-Players
7. Keep NTSC to NTSC - or - PAL to PAL when going from iMovie to iDVD
(I use JES_Deinterlacer to keep frame per sec. same from editing to the Video-DVD result.)
8. Don’t burn more than three DVDs at a time - but let the laser cool off for a while before next batch.
iDVD quality also depends on.
• DVD is a standard in it self. It is Standard Definition Quality = Same as on old CRT-TV sets and can not
deliver anything better that this.
HD-DVD was a short-lived standard and it was only a few Toshiba DVD-players that could playback.
These DVDs could be made in DVD-Studio Pro. But they don’t playback on any other standard DVD-Player.
Blu-Ray / BD can be coded onto DVDs but limited in time to - about 20-30 minutes and then need
_ Roxio Toast™ 10 Pro incl. BD-component
_ BD disks and burner if full length movies are to be stored
_ BD-Player or PlayStation3 - to be able to playback
The BD-encoded DVDs can be play-backed IF Mac also have Roxio DVD-player tool. Not on any standard Mac or DVD-player
Full BD-disks needs a BD-player (in Mac) as they need blue-laser to be read. No red-laser can do this.
• HOW much free space is there on Your internal (start-up) hard disk. Go for approx. 25Gb.
less than 5Gb and Your result will most probably not play.
• How it was recorded - Tripod vs Handheld Camera. A stable picture will give a much higher quality
• Audio is most often more critical than picture. Bad audio and with dropouts usually results in a non-viewed movie.
• Use of Video-editor. iMovie’08 or 09 or 11 are not the tools for DVD-production. They discard every second line resulting in a close to VHS-tape quality.
iMovie 1 to HD6 and FinalCut any version delivers same quality as Camera record in = 100% to iDVD
• What kind of movie project You drop into it. MPEG4 seems to be a bad choice.
other strange formats are .avi, .wmv, .flash etc. Convert to streamingDV first
Also audio formats matters. I use only .aiff or from miniDV tape Camera 16-bit
strange formats often problematic are .avi, .wmv, audio from iTunes, .mp3 etc
Convert to .aiff first and use this in movie project
• What kind of standard - NTSC movie and NTSC DVD or PAL to PAL - no mix.
(If You need to change to do a NTSC DVD from PAL material let JES_Deinterlacer_3.2.2 do the conversion)
(Dropping a PAL movie into a NTSC iDVD project
(US) NTSC DVDs most often are playable in EU
(EU) PAL DVDs most often needs to be converted to play in US
UNLESS. They are play-backed by a Mac - then You need not to care
• What kind of DVDs You are using. I use Verbatim DVD-R (this brand AND no +R or +/-RW)
• How You encode and burn it. Two settings prior iDVD’08 or 09
Pro Quality (only in iDVD 08 & 09)
Best / High Quality (not always - most often not)
Best / High Performances (most often my choice before Pro Quality)
1. go to iDVD pref. menu and select tab far right and set burn speed to x1 (less errors = plays better) - only in iDVD 08 & 09
(x4 by some and may be even better)
2. Project info. Select Professional Encoding - only in iDVD 08 & 09.
Region codes.
iDVD - only burn Region = 0 - meaning - DVDs are playable everywhere
DVD Studio pro can set Region codes.
1 = US
2 = EU
unclemano wrote
What it turned out to be was the "quality" settings in iDVD. The total clip time was NOT over 2 hours or 4.7GB, yet iDVD created massive visual artifacts on the "professional quality" setting.
I switched the settings to "high quality" which solved the problem. According iDVD help, "high quality" determines the best bit rate for the clips you have.
I have NEVER seen iDVD do this before, especially when I was under the 2 hour and 4.7GB limits.
For anyone else, there seem to be 2 places in iDVD to set quality settings, the first is under "preferences" and the second under "project info." They do NOT seem to be linked (i.e. if you change one, the other is NOT changed). take care, Mario
to get this to work I
• Secure a minimum of 25Gb free space on Start-Up (Mac OS) hard disk
• Use Verbatim DVD-R (absolutely no +/-RW)
• Set down burn speed to x4 - less burn errors = plays on more devices
• No other process running in background as - ScreenSaver, EnergySaver OR TIMEMACHINE etc
• and I'm very careful on what kind of video-codecs, audio file format and photo file formats I use
• and I consider the iDVD Bug - never go back to video-editor to change/up-date - if so Start a brand new iDVD project
• Chapters set as they should - NO one at very beginning and no one in any transition or within 2 sec from it
• Lay-out - Turn on TV-Safe area and keep everything buttons, titles etc WELL INSIDE not even touching it !
Try to break the process up into two stages
• Save as a DiskImage (calculating part)
• Burn from this .img file (burning stage)
To isolate where the problem starts.
Another thing is - Playing it onto a Blu-Ray Player. My PlayStation3 can play BD-disks but not all of my home made DVDs so to get this to work I
• Secure a minimum of 25Gb free space on Start-Up (Mac OS) hard disk
• Use Verbatim DVD-R (absolutely no +/-RW)
• Set down burn speed to x4 - less burn errors = plays on more devices
• No other process running in background as - ScreenSaver, EnergySaver OR TIMEMACHINE etc
• and I'm very careful on what kind of video-codecs, audio file format and photo file formats I use
• and I consider the iDVD Bug - never go back to video-editor to change/up-date - if so Start a brand new iDVD project
• Chapters set as they should - NO one at very beginning and no one in any transition or within 2 sec from it
• Lay-out - Turn on TV-Safe area and keep everything buttons, titles etc WELL INSIDE not even touching it !
TO GET IT TO WORK SLIGHTLY FASTER
• Minimum of 25Gb free space on Start-Up hard disk
• No other programs running in BackGround e.g. Energy-Saver
• Don’t let HD spin down or be turned off (in Energy-Save)
• Move hard disks that are not to be used to Trash - To be disconnected/turned off
• Goto Spotlight and set the rest of them under Integrity (not to be scanned)
• Set screen-saver to a folder without any photo - then make an active corner (up right for me) and set
pointer to this - turns on screen saver - to show that it has nothing to show
• No File Vault on - Important
• NO - TimeMachine - during iMovie/iDVD work either ! IMPORTANT
• Lot's of icons on DeskTop/Finder also slows down the Mac noticeably
• Start a new User-Account and log into this and iMovie get's faster too - if a project is in a hurry
• And let Mac run on Mains - not just on battery
Yours Bengt W

DVD Burning Poor quality

I created a slide show in IPhoto including the "Ken Burns" effect. I also added four audio tracks to the slide show. I transferred the file to I DVD with sharing. Two audio tracks were dropped in the transfer and the resulting image quality was poor. Images were wavy and some had skips and tiling. Also the audio tracks that remained sounded like the artist was gargling the words. I'm a recent Apple convert and my I book is only 2 mo. old. Do I have a malfunctioning DVD burner or am I doing something wrong?

I created a slide show in IPhoto including the "Ken Burns" effect. I also added four audio tracks to the slide show. I transferred the file to I DVD with sharing. Two audio tracks were dropped in the transfer and the resulting image quality was poor. Images were wavy and some had skips and tiling. Also the audio tracks that remained sounded like the artist was gargling the words. I'm a recent Apple convert and my I book is only 2 mo. old. Do I have a malfunctioning DVD burner or am I doing something wrong?

DVD SP 4.0 on new iMac?

Hi all,
I waited and waited for FCPx and was sorley dissapointed that DVD Sp is no longer an option
So... I managed to secure a retail boxed version of DVD SP 4.0 from ebay - old stock I guess but still original software. However it would not install on Snow Loepard, and not a hope in **** on Lion of course.
So my question is - would I be able to install a copy of Leopard (OSX 10.5) on an external HHD, boot from that and install DVD SP 4.0 on it? I note there is a warning from Apple not to install earlier versions of the OS than cmae with the unit, but makes no reference to installing it on an external drive.
Would OSX 10.5 run on the latest iMacs (I have the current verson - 16gb ram)?
I would really appreciate any help as I have a few projects I want to put to DVD but at present I cant produce a decent disc
Thanks in advance.
Andy.

DVD Studio Pro 4.0 shipped stand alone and as part of FCS 1. It was a Power PC application, so it won't install on Mac OS 10.6 unless you have Rosetta on that computer. It won't install on 10.7 under any circumstances.
DVD Studio Pro 4.1 shipped with FCS 1.5, the first Universal version for both Power PC and Intel CPUs.
It will only run correctly up to Mac OS X 10.4.6, unless you update to version 4.1.3. Then it will run on Mac OS X 10.5 too. It might run on 10.6 but you would ideally use DVD SP 4.2.0 -part of FCS 2.
The original FCS 2009 (sometimes incorrectly called FCS 3) came with DVD SP 4.2.1. It can be updated to version 4.2.2 and runs in Mac OS X 10.7.
You will not be able to boot your new Mac from a Mac OS X 10.5 installation DVD or external drive where it is already installed.

Export to HQ DVD very poor quality

Hi all,
I've been trying to export to an HQ DVD, meaning I've chosen the highest settings, ending up with a 5552Mb File for 75 mn... which I believe would be enough to have a very high "normal"definition .
ok I know it wouldn't fit but I burned 10mn of timeline with these settings, to check, and the quality is very poor. I believe as bad as a VHS second generation copy... My titles appear like a very low photoshop jpg compression, and all lignes and shapes are surrounded by some kind of compression artefacts not acceptable even in normal def. (not mentioning the interlaced lines at the edit point when the clip has been altered in size or color etc...) You get the picture...
I had a look at the calculator, that is not much help finally when exporting from premiere.
What I want to do is export my (xdcam hd 50mbps 1080 50i).mxf timeline to a beatiful dvd that everybody can play....
Should I go for a third party encoder?
Also, It seems that when I export and burn through Encore, I get a slightly vertically stretched frame, that ellipses the perfect circles I have on the timeline. Although I respect the pixel ratio of 1.0, 16.9 screen... wide screen etc... I always get this stretching. (Playing the file from the pc is correct.)
What puzzles me is to see some nice SD DVDs around, burnt from HD files and I'm not able to get at least the same results from a broadcast approved camcorder and premiere CS6.
Export settings are:
Help please... Thanks.

Glad to help.
I have been using Encore every since it was first released and on many occasions I have pruduced MPG files encoded at different rates so that I can demonstrate to the audience at my presentations how the different settings can affect the end MPG movie
With Encore I have found that the settings I gave you earlier give the best compromise results, in my tests having the max setting at its max position and the target above eight can produce flawed mpeg files. this is not as a resullt of one off encoding but I have repeated it with each version of Encore with varying results, certainly using Encore in my CS5.5 Suite produces softer DVD's than earlier versions, in my opinion that is..
With HD source my Panasonic HMC 150 Encore produces reasonable MPG SD files but the Canon 7 D produces more artifacts.
Enough of a remeniss and ramble, good luck
Addiitonally with the completed DVD there is a distinct difference depending upon which DVD player is used, using the same DVD my Sony 3D bluray player upscales better than my Panasonic Bluray recorder, whereas at a club I go to the Pioneer AV amp upscales the DVD even better, therefore I would conclude that the device playing back the DVD can have a vast effect on what you see.

I can't get a dvd to play on my new iMac?

I inserted a dvd into my imac and it asked me to change the country code as the dvd code and the imac didn't match. I changed it to you US or North America, whatever the code was and I still can't play the DVD. Any idea why? Can't I use this as a dvd player.

I just figured it out. Somehow I didn't change it to the correct code of 1. So on the second shot of 5 allowed I realized I didn't change and save. Now the dvd played.

Macbook pro doesnt read dvd+r burned by my new imac

i burned a dvd r with my imac and when i inserted in in the imac drive again
it read all of it with no problem
when i inserted the same disc in my macbook pro it didn't manage to read it or even recognize it
what might be the problem

If you have Apple Care, then call them. If you do not have Apple Care, then you will be charged for "tech" service. You will come out cheaper if you try the solution that iVmichael mentioned. Or try the suggestions mentioned in the Help menu as those are free.

CDs/DVDs always get stuck in new iMac

I just bought the 24 inch iMac from the apple store a month ago. Why is it that most of the Cds/DVDs get stuck in the drive and I have to use the support "paperclip" method to get them out? A computer that costs this much shouldn't have such a fundamental problem - anyone else have this issue?
iMac6 Intel Core 2 Duo Mac OS X (10.4.9)
iMac6 Intel Core 2 Duo Mac OS X (10.4.9)

Welcome to Apple Discussions!
http://docs.info.apple.com/article.html?artnum=58641 explains why this may happen.
If none of the disks you are using have anything written on their label side, or any sticky labels, and fit the required size shape, and thickness, then I'd take it to the shop. The paperclip method was retired several years ago. You may have damaged your drive if you used a paperclip.

DOH! Poor quality output after 4 days trying to perfect the DVD

Hi guys
I have been trying to burn a 1hr 27min .avi file (700MB) for 4 days now. Ive tried a few ways but each time the DVD has poorer quality video than the original file.
I tried:
- opening .avi file in ImovieHD and then sharing it with iDVD (it refused to burn it, after going thru the whole rendering encoding process mind you)
- going straight to iDVD (definitely it would not burn)
- opening in QT Pro and then 'stream as DV'. which i opened in iDVD and saved as disc image with menus etc. burnt using toast titanium - probably the best result so far i think)
however the dv file was worse than an mp4 file i created using iSquint from the .avi.
- have also tried just opening the avi in toast and burning from there. worse product than the previous one.
So, any suggestions? The main problem is things look quite jagged and a bit pixelated if you know what i mean. Where as the mp4 file, which ive played using iTunes and VLC, is quite smooth (but you can see there's still a bit of quality loss when sharp movements are made by the actors.(expected).
So I've lost lots of time on this stupid thing, but I just really want to sort out how to do it well once and for all.
Any help would be most appreciated.
Thanks

G'day Looneysbin
Sounds like a hardware problem. Is your drive under warranty?
For a start, try rendering your iDVD project to a disk image, instead of burning straight to disk.
Then, create a new Burn Folder on your desktop, and drag the VIDEO.TS file from the opened disk image to the burn folder (note that only an alias actually gets put in the folder).
Next, use Control-click on the Burn Folder to get the contextual menu, and select 'Burn Disc'. Follow the prompts, but burn at the minimum speed available.
This way, your apparent hardware problem won't mean re-rendering the iDVD file each time you try and burn a disc.
You can also keep the .img file on your hard drive as a backup of the disc.
You might also be having a problem with quality of the actual discs themselves. What brand are you using?
Regards
Santa

DVD poor quality

I just created a DVD but the video quality is too poor to use. I get 'ghosting' or flicker with motion, which is 99% of the content.
A client gave me 14 home-made DVDs containing video of high school basketball games and asked me to create a highlight video. I edited the VOB files in Premiere CS4 (4.1.0) to pull highlights and compile them into a single highlight DVD.
I exported the video to Adobe Media Encoder (4.0.0.374) to create a F4V file to be used on websites. I used the standard preset. The quality of the F4V video is good.
I then used Adobe Dynamic Link to export to Encore CS4 (4.0.0.258). I burned a DVD and the result was a DVD with poor quality.
There is a brief clip in the highlight video that I recorded myself of the athlete providing a short introduction of himself. That clip and the still titles I made look good on the DVD, but the highlight clips from the client's DVDs are very poor.
From some of the discussions I've already read in this forum, I assume I need to change a field option or the Anti-flicker value under Effect Controls or something similar, but haven't figured out what yet. Also, when I make changes to values, do I have to burn a DVD to see the result of the change or is there a better way to preview?
Thanks for your help!
Dan

A client gave me 14 home-made DVDs containing video of high school basketball games and asked me to create a highlight video. I edited the VOB files in Premiere CS4 (4.1.0) to pull highlights and compile them into a single highlight DVD.
It is very likely that the double MPEG-2 encoding is degrading the material too much. Is it possible to get back to the client's original tapes? That would save one MPEG-2 compression. Otherwise, what you have is probably as good as it will get.
Good luck,
Hunt

DVD drive problems : should I buy the new iMac ?

Hello, being new to these discussions, I don't know if this question was answered before.
My last iMac's DVD drive stopped working after 3 years use. And from reading the discussions, this problem seemed quite common.
But 3 years is not bad, considering the posts talking about the DVD drive not working on NEW iMacs.
Does anybody know if Apple is going to do something about this soon ? My computer is a working tool, and I cannot spend time or money on repairs all the time.
Thank you.
A Mac user since 1985

+"Well, since nobody has an answer, I suppose I will wait until I no longer see the DVD drive problems on the discussions."+
That might be a while. I bought my iMac Oct. 15 and the DVD drive is already not responding. Backing up files, I had burned 2 DVDs from the same package, Toast says this one is a CD-RW and unwritable, and makes a noise like it's trying to eject it but nothing happens. Disk utility says the DVD drive is empty and nothing shows up in the Finder. Using Terminal (drutil eject) and starting up with the mouse button held down makes the same noise as trying to eject it in Toast, with the same results - nothing.
Still trying to find the receipt to take it back & get it repaired. I sure miss the hole for the paper clip.

Choppy video playback on my 1st Gen iMac G5

Everything from internet video to DVD playback on my 1st Gen iMac G5 is choppy and getting more so as time goes on. Can anyone tell me if this is a symptom of the defect that's covered under the extension plan or is this just some other problem?

Check the version in the Application Folder!
(I have had no problems at all after installing QT 7.5 on my G5 iMac in case you think it can't work at all.)
It is possible that something in either your pre-existing setup or your method of installing updates, are the root causes of whatever problems you are having with QT 7.5 particularly with choppy playback. Out of date plug-ins and add-ons could also be playing a part. Some users have found choppy playback to be associated with improperly loaded plug-ins and add-ons from third party vendors as well as those included by Apple with prior versions of Quicktime.
Third-party add-ons include DivX, Flip4Mac, or FLV components, while the included plug-ins are AppleIntermediateCodec.component, and AppleMPEG2Codec.component. The files for these are located in the root library, therefore a faulty component will load improperly for all users, resulting in choppy playback even when a user creates a new account. Some may need updating or just reinstalling to work with QT 7.5.
You should therefore:
Remove and re-add all quicktime components and plug-ins.
Navigate to /Library/QuickTime/
Move all plug-in ".component" files from the folder (to the Desktop, for instance)
Launch QuickTime and quit it again
Place the ".component" files back in the QuickTime library folder
Launch QuickTime again, and the choppiness should be better.
A few more things to try but in each case first close all applications and repair permissions.
1 Try opening then closing GarageBand, or launching then quitting the "Audio MIDI Setup" application located in Applications/Utilities. Failing that, go back to Audio MIDI Setup, and under the Audio Devices tab, make sure the Audio Output Format is 44100.0 2ch-16bit.
Restart your Mac.
2 Go to the Library on your main hard disk and find the Internet Plug-Ins folder. Try removing the following files:
QuickTime plugin.plugin
Quicktime plugin.webplugin
Restart your Mac.
Re-install the Quicktime 7.5 update
Go to Home/Library/Receipts and delete the file Quicktime 7.5 pkg.
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/
You should read this support page http://perian.org/#support in case you need to delete older codecs.
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.)
You should also ensure that you have downloaded and installed all the correct version for your Mac of all recent Security Updates.
(N.B. Security Updates require both a restart and a permission repair.)
In Macintosh HD/Library/Quicktime/ delete any files relating to DivX (Perian already has them). However it should be noted that Perian is not an internet plugin and will not play DivX files imbedded on a website. For that you will need the DivX Player browser plugin available from http://www.divx.com/divx/mac/
Now go to Safari Preferences/Security, and tick the boxes under Web Content (all 4 of them) to enable Java.
Lastly open Audio Midi Setup (which you will find in the Utilities Folder of your Applications Folder) and click on Audio Devices. Make sure that both Audio Input and Audio Output, under Format, are set to 44100 Hz, and that you have selected 'Built in Audio'.
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.

Dvd playback poor quality on new iMac

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