Movies stalling on playback

I have a large library of movies in iTunes all stored on a NAS which until now has worked perfectly but I have just tried to watch a film and after a few minutes it started to stutter then stalled altogether. I have tried several different movies all with the same result, all of which I have watched before without a problem.
I have run check disc on the NAS and nothing was found, the NAS is only about 50% full so lots of space.
Any ideas anyone.

I'm pretty sure its related to the "Compatibility Update for QuickTime 7.5.5" that was released on 11/17. This was 1 of 2 updates that I installed yesterday.

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My Apple TV stalls during playback. I am hooked up through ethernet so I'm certain that it is not a network issue. What happens is that after a few minutes of normal playback the movie that I'm watching simply stalls. It looks like AppleTV is trying to reboot it. if I rewind it briefly and restart the movie by pushing play it seems to be fine. But it it stalls again after a few minutes. I have to do this very often and it becomes quite distracting when you're trying to watch a show.
One thing I have noticed is that if I pause the program before it stalls and leave it for about 15 minutes I can watch a large portion of the show uninterrupted.
The files are in my iTunes library. I don't seem to have this issue if I'm playing the files from my iPad via AirPlay. I have restarted, reset, and rebooted AppleTV several times and it still keeps doing it. Any suggestions out there?

640 x 480
Widescreen 16:9
These settings are contradictory. Please post a screen capture image of the QT "Inspector" window to confirm what encode matrix setting, PAR display setting, and Scale display settings are actually embedded in your file. Also please confirm whether or not the source material was widescreen and it is 4:3 aspect you wish to correct at this point. If not, then please state the height at which the transcoded file was encoded and the target aspect ratio at which you want files to play in all media players.
Once compressed it plays back in Windows Media Player as 16:9 video.
When played back with Quicktime it is squished into a 4:3 format.
Different players dispay content aspect differently.
Why is this happening and how can I fix it?
QT 7, for instance, displays the file using specific Scale dimensions and if these dimensions are not equivalent to PAR/anamorphic playback settings, then the file can display differently in differently media players. As to fixing the problem, that depends on which setting you are trying to fix and what platform/software is available.

IMovie 09 export fails - exported movie stalls, parts missing

Hi there fellow mac users,
I've got a problem here, and it seems like I am the only one (I've searched extensively for a solution). I'm working on an iM project using 1080i AIC imported video, shot using a JVC HD7. The .TOD files the HD7 produces were converted to AIC, and then imported as 'Large - 960x540' in iM '09. So far so good, the .mov files ie the footage is all very playable and of wonderful quality. iM '09 has a really easy interface and offers anything I need to edit a movie. So now I was ready to export. The first attempt I made was to export a Large movie via the Share menu.
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I normally use the "no transition" transition for about 90% of my clips, and iMovie handles it great.
If I had to guess, the problem is related to the length of your movie. But it could also be related to export settings.
First, reboot your Mac. Then...
1)
I would first right-click on the title of your movie, and select DUPLICATE. This will give you a way to test without hurting your current file.
Then, in the duplicate copy, delete every thing except the first 15 minutes of the movie. Share that in Large, and see how it looks. If it looks good, it is probably the length of the movie that is an issue.
2) If you are using the SHARE/iTUNES or SHARE/TO WEB GALLERY using the large preset, you should be fine. If you are using SHARE/EXPORT TO QUICKTIME and changing the settings, that could be an issue. Check your settings for Keyframe. It should probably be automatic or every 24 frames. Also check data rate. It should be 5000 to 8000 kbps, but could go higher to get better quality. If it is too low, it could cause this issue.
There is nothing in the iMovie architecture that would say it cannot make a theatrical length movie, but in practice, many people report having issues when movies get much longer than 30 minutes. My guess would be that somewhere over 30 minutes you create so many swapfiles and there is so much swapping that iMovie starts behaving unpredictably. For example, iMovie might require that more pages are swapped in than there is real memory available. (But I'm no programmer - so discount that by 80%). There is a difference in the iMovie 09 architecture from iMovie 6. iMovie 6 would render all effects, titles, transitions, audio, etc as you were editing, so you are always waiting for something to finish rendering, iMovie 9 allows you to edit fast and apply all the choices at rendering time.
Probably 95% of the people who use iMovie are making home videos of 5 to 10 minutes, or exporting multiple short movies (say up to 20 minutes) to iDVD which will be accessed in a menu structure. It is rare for someone to want to make a theatrical length movie. When people do, they are probably combining multiple logical movies in order to "fill" a DVD.
My first advice would be to divide this movie up unto chunks of up to 30 minutes. If you need them in one movie, stitch them back together later using QuickTime PRo by putting the in a .mov container.
A third thing to try would be to SHARE/to IDVD and see if you get any better results.
If you are making a real theatrical movie, invest in FInal Cut Express or Final Cut Studio, which handles large movies and has tools to process them in chunks.
Message was edited by: AppleMan1958

While watching purchased movies on itunes....Movie stalls/freezes, While watching purchased movies on itunes....Movie stalls/freezes

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****I don't work for HP****
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Movies stalling on playback

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