Ios imovie export format: .mov vs. .mp4

Can anyone please tell me how to force short (under 2 minute) iOS iMovie files to save as mp4s into Camera Roll?
I am an art & music teacher whose students create short iMovies for several assignments. After they're done, they save their movies to the camera roll -- and then attach them to our assignment in Edmodo to submit for a grade. In this last assignment, suddenly some of the kids' files are saving as mp4 and some as mov -- and I can't open the .mov files on my school-issued iPad 2 or on my home MacBook. We have never run into this problem before and I can't sort out if it is a matter of file size or what. I experimented with uploading files into email -- and sometimes they save as mp4 and sometimes as mov. Thanks for any help you can offer.

Aquatic999 wrote:
... When I compared the size of the original vs the spliced iMovie version I found that they are nearly half the original size.
Why not?
iMovie doesn't 'hand-thru' the data; any export setting (what was your choice?) compresses the material - in your case by 50% ... did it visually do any harm? If not - no prob, hm?
And again: mov or mp4 are just wrappers, no 'format', esp. no codec - that is INSIDE the mov. Or mp4 ...

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Impossible to export (format .mov)

Hello there,
iMovie has worked fine until now. But now, I don't know what happened, but when I export a movie as a .mov (to cd or internet or anything else), the movie is over 160 minutes long (instead of around 30 minutes) and is breaking up.
Any idea what to do?
Thanks for your answer.

Hello again Bengt,
And first of all, thank you for using your time to help. That's great. Thank you.
Unfortunately, it didn't help, I'm sad to say.
This sounds more severe. I would.
- delete the iMovie pref file
I tried. Nothing.
- run: Repair permissions (Apple Disk Util tool)
I did it too. It repaired a lot of things but didn't change anything.
- start from another hard disk or CD/DVD then
run: Repair hard disk (Apple Disk Util tool)
I don't understand this one? I don't have any other harddisk. I do have an extern DVD but this is because the one in the mac doesn't work really.
- start a new account and log into this and re-try.
I did it but it didn't change anything.
I didn't erase the pref file again though... I'll try it and then log on as an other user and see.
Now to your questions :
- How much free space is there on Your int hard disk
Right now, as I have copied some differents other imovies file, not much: 46 GB
- Is there any ext devices connected
Yes. There is a iSight, mighty Mouse, iMic, a mouse pad with USB connection and usb-hub and an external DVD Reader/burner (PIONEER DVD-RW DVR-111D).
- Mac OS X.4.8,
Correct.
iMovie v. 6.0.3 ?
Correct (6.0.3 (267.2) to be precise)
and QuickTime version ?
QuickTime Pro version 7.1.5
- Did You put in any third party plug-ins to iMovie or
into QT ?
Yes: I used som themes from eyecandy in iMovies and som extra transitions, but it has worked fine i a long time.
And I use Flip4Mac (I don't know if it's a plugin, I think it is)
- is you Mac as "factory delivered"?
- or did you install a new iLife version?
I did install a new iLife version long ago It is 1.5 year old and when I bought it, it came with iLife 05.
- or did you de-install any files/apps, e.g. using
"Multilingual" etc. pp
Well... I installed Second Life some days ago... I don't know if it uses "Multilingual"...
- other programs that interferes like < Unsanity APE >
I don't know what "unsanity" is and i made a search. I found only one file: com.unsanity.ape.plist
What is it?
Shall I delete it?
< FileVault > etc.
I don't use FileVault
1. Sequre that there are at least 20Gb free space on the
internal hard disk.
There is.
2. Try not using any external hard disk
I don't. Only external DVD.
3. Sometimes third part software can localize and repair
the problem like:
- Disk Warrior™
- TechTool™
Irk! You saw the price of those things? Gosh I really hope we can solve the problem without it
Once again: Thank you very much for your help.
Regards,
Chill

Why won't iMovie export my movies?

Basically Imovie isn't uploading anything for me every since the new update. I used a lot of green screen effects and picture backgrounds so I assumed that may be the problem and recorded the movie it self with quick time player. Yet even after it was just one clip and music, it won't export.
It says it has "failed".
Help?

Hello there, charliewittke.
The following link from the online iMovie Help Guide shows the steps on how to export your video:
iMovie Help: Export a QuickTime file
http://help.apple.com/imovie/mac/10.0/#move6e0cb2ad
Thanks for reaching out to Apple Support Communities.
Cheers,
Pedro.

Export Logic Movie to mp4?

Is it possible to export audio to a movie that is a file other than .mov?

If you can open up the video in Logic then it can export the audio to it. regardless of the extension. Logic doesn't change the video format. During an export to audio it will only replace the audio track and trims the length of the movie if you bounce only a section of it.
Edgar Rothermich
www.DingDingMusic.com/Manuals/

Is XMP import/export for MOV/MTS/MP4 files not supported?

I have been evalutating LR4 and am stuck on how to import my files from another DAM into LR4.
I am able to write XMP into JPG files, and provide sidecar XMP files for RAW (CR2) and MOV/MP4/MTS files, writing my hierarchical keyword information into the xmp-dc:Subject and xmp-lr:HierarchicalSubject fields.
LR4 seems to read the XMP keywords from the JPG and RAW files just fine and re-creates my keyword hierarchy.
LR4 seems to ignore on import the XMP for the non-image files such as the MOV/MP4/MTS files for which I have provided sidecar files.
LR4 also does not write out XMP files for the non-image files, when I use save Medatada.
Does LR4 just ignore import/writing XMP for these non-image files?
Thanks,

MTS files can't really accept metadata embedding -your best bet is to use ClipWrap to "re-wrap" AVCHD/MTS files into MOV files.
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Title question. I can only seem to export my movie using .mp4 and I've seen on youtube using previous versions of iMovie being able to change the format...
I use a Sony DSC-HX20V to capture my footage which formats the videos in AVCHD and it records in an image quality of 50p. I want to also know how to import these videos onto a 4th generation iPod Touch and which format will support the device better. Thank You.

Although I don't use it myself, saving to Theater creates versions for all sorts of devices including iPod Touches.
iMovie 10 help says:
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I was wondering how I can export a quicktime movie (camcorder film) to a smaller size but that can also be played on both Mac and PC computers? I tryed to export a couple time using encoding such as MPEG-4 but the movie accually was much smaller to view than the original and the second time I tryed to encode it at a bigger size, the movie played at the same sze as the original but at a lower quality because it was stretched.
Can anyone help me with this. I just want to export and save a quicktime movie into a playble formate for both mac and windows and also not taking up too much disk space either. Thank you.
Dorian Oddi

One could write a book (I did) that explains what all the codecs do and where and when to use them.
You need only need to know where the file will be viewed and its source format.
As Rick has pointed out, most new digital cameras capture in DV (Digital Video) and they are nearly instantly ready for software editing (like iMovie). QuickTime Pro can also edit the .dv files.
Once you determine where the file will be viewed (the Web for example) you'll get an understanding of methods to "compress" the file to fit the planned playback.
Three major factors that reduce the file size:
The new dimensions (720X480 DV files) to Web 320X240 (DV uses rectangular pixels).
Reduce the "frame rate". If the source was 30 frames per second you can usually remove half of them (15fps). Use more fps if the source has lots of motion.
The codecs used. Compressor-decompressor is handled by the delivery format (.mov or .mp4). Some are more efficient and offer better quality when enlarged during playback. MPEG-4 is the most modern and will soon become the next generation of DVD (currently MPEG-2).
This is where your question can only be answered by you. The quality can be adjusted (some codecs offer "sliders"; good better best while others allow you to set a data rate) and only you know what is acceptable.
Rick suggests a "one minute" export and I agree. Use various settings and data rates and use your eyes to decide what is acceptable.
Don't forget that part of your capture was audio. If your camera captures only mono formats making the export into stereo does nothing but double the size of the audio track. The Advanced Audio Codec (AAC) format found in MPEG-4 exports does a great job of reducing the file size. You can control these settings at export, too.

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I would like to export an iMovie project to a format that Google Video accepts. Google Video prefers mpeg 4 video with mp3 audio. iMovie "expert settings" allows mpeg 4 export, but the only audio options for this are AAC or "none". Does anyone know how I can either:
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Ipad ios imovie deletion help

Hi
I've been using imovie on my ipad air to create videos to post on youtube. I couldn't get the imovie upload options to work (I believe this is a format issue), so took to using icapture to upload: Create the video with ios imovie, save the movie then upload with icaptue and it all works fine, video right there on youtube. However, while I can delete the projects easily enough, the saved versions of the movies still exist in the 'video' section of imovie and I can't figure out how to remove/delete them.
Please, if anyone can tell me how, I'd be most grateful.

Hello, agrippa23.
Thank you for visiting Apple Support Communities.
Here is some information that you may find helpful when wanting to delete a project.
Working with projects
Cheers,
Jason H.

With iMovie 9.0.4 can export to .mov only. Rest of formats: error -50. What can I do? Thx.

With iMovie 9.0.4 can export to .mov only. Rest of formats: error -50. What can I do? Thx.

Just as a preventative measure try running Disk Utility in the Utilities Folder inside the Applications Folder. Run Repair Disk Permissions on the whole hard drive.
According to this disuccsion group posting on MacRumours.com, Error -50 is a permissions error and repairing permissions may be enough to get you going again:
http://forums.macrumors.com/showthread.php?t=1151402

Every time I try to export my movie from iMovie, I keep getting a message that states, "Unable to prepare project for publication. The project could not be prepared for publication because an error occurred. (-50). HELP

Every time I try to export my movie from iMovie, I keep getting a message that states, "Unable to prepare project for publication. The project could not be prepared for publication because an error occurred. (-50). HELP

Hi
Error -50 paramErr Error in user parameter list
Can there be any external hard disks - if so How is/are it/they formatted ? Must be Mac OS Extended (hfs) if used for Video.
UNIX/DOS/FAT32/Mac OS Exchange - works for most but not for VIDEO.
What this means in Your situation is above me.
• free space on internal boot hard disk? How much ?
Video codec
• streamingDV, AIC etc. (not .avi, .mp4, .m4v, .wmv etc as they are containers not codecs)
Pictures
• in what format ? .jpg, .bmp, .tif, else ?
Audio
• from where/what format ? iTunes, .avi, .mp3, .aiff, else ?
Trash the Preference file:
The "com.apple.iMovie.plist" file
Many users has not observed that there are TWO libraries.
• Library - at root level
• Library - in user/account folder - THIS IS THE ONE to look into
from Luke Burns
I fixed the problem.. but it was very, very strange. I had a very long section for credits and set the line spacing to 1.0.. for some reason this caused it. I removed it, and it worked fine. I put it back, and I couldn't preview or play the video.
I don't know why that could cause that big of a problem, but it did..
Klaus1
You need more free space on your hard drive.
jonorparkerjon
After phone support from apple I ended up creating a new project and adding all 117 clips back in individually till I found out what clips flagged and would not allow me to export. I had 3 I deleted and replaced and everything works now 1hr after tedious work....
Where do Your material come from
• Camera
• External hard disk
• USB-memory
And all are connected so that iMovie can find it ?
from: jonorparkerjon
After phone support from apple I ended up creating a new project and adding all 117 clips back in individually till I found out what clips flagged and would not allow me to export. I had 3 I deleted and replaced and everything works now 1hr after tedious work....
from Karsten S
Shorter clips than 1,5 sec might be one of the culptrits
Bengt cont.
Set-Up might differ
• Mac OS - most probably X.7 or more
• iMovie version - more than iM'11 v. 9.0.4
Action taken
• Finalizing project - I never do as I never understood the gain to do so
• Share as HD to iDVD - never give any gain but if it works the resulting DVD is less quality than if SD-quality was shared
fps - set
•I only use PAL (25fps)
Yours Bengt W

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Hey there,
Have a problem.
Been working on a nice clip, wanted to export the movie and I get this error message that sais:
Unable to prepare project for publishing.
The project could not be prepared for publishing because an error occurred. (-50)
What shall I do?? Can anyone help me out?
I have enough memory on my disk...
Thanks in advance!
T

I cannot help you because your description of the problem is very vague. First what software did you update, iOS or iMovie. Second where are you trying to export iMovie Films to?

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Hello,
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Processor 2.26GHz intel core 2 Duo
2GB 1067 MHz DDR3
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While we all have MacBooks in this forum not all of us use iMovie. There's a iMovie Support Community where everybody has iMovie. You should also post this question there https://discussions.apple.com/community/ilife/imovie

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this happens in imovie 11

Hi Pete,
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Ios imovie export format: .mov vs. .mp4

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