Disk image incomplete import

Hi!I created a Disk image (.dmg file) of a personal DVD. I did it in Disk Utilities. The fact is that, following the instructions in these cases, I double click the .dmg file having iMovie open and the Import Window automatically opens. There I can see the complete clip of 64min. I start the import and, when it finishes it says something like "Import complete. 1 clip 64 min". But when I watch the event....it's only 57 min 03 sec long!!!!!!!!! I don't know why I've lost 7 min!!
What can I do??
Thanks a lot!

Here is a link to my tip for importing from a personal DVD. This way, you could import those final 7 minutes if they are there.

Similar Messages

What can I do to create a disk image when I continue to get the prompt "permission denied"? I have run the permission repair, restarted the computer and nothing changes.

I want to create a disk image for important information. I continue to get "Permission Denied" even though I have run the disk utility for repair and verify disk permissions. Is there a solution for this?

I had same problem as I was trying to build a windows iso following the bootcamp instructions (last evening). I learned you cannot create a disk image at root due to changes in the operating system made by apple. As a user (even an admin user) you can only create a disk image below root (such as in your desktop). Any attempt to creat an image at root will return permission denied.
The Apple Disk Utility (on three macs I have tried so far) defaults to creating an iso image at the root. If you tell it to create the image - you immediately get a permission denied error.
None of the iso creation instructions I have found on apple site so far speak to this.

Why do I have to make disk image of AVCHD to import into iMovie?

iMovie imports AVCHD format file structure from the camera quite easily. (or so I hear, I have not done so myself yet). I have footage from the camera saved to an external hard disk which I want to import into iMovie08. I am a newbie to Apple/Mac things. From these fora I learned that I need to make a disk image of the AVCHD directory and mount it. I did that and it seems to work.
But this process is painful. For the 12Gig save I made on 27Jan08, the disk utility took forever to make a disk image. It failed once complaining lack of disk space. I thought the firewire external disk was overwhelmed by IO and copied the directory to the internal disk, and made a disk image. I thought it was hung after about 15 minutes killed the diskutility. I had a corrupted image file. Then left diskutility running overnight and seems to have finished the job. This morning iMovie looked at the disk image and is estimating it is going to take 3 hours to bring it in. May be it is transcoding to a more editable format like mpeg-4 or something.
Why do I have to jump through so many hoops to make iMovie recognize the AVCHD structure? Why can't I just drag a AVCHD directory into iMovie and make it read it? If I can reclaim the 24 gigs in the internal disk at the end of the process, I guess I can live with it. But, come on, copying 12 gigs over Firewire, another hour to make a disk image... I was expecting better user experience than this. (Did I mention I am newbie for Apple? Recent refugee from the vistaland)

AppleMan1958 wrote:
I would not recommend waiting until you have 12GB of AVCHD (which might import as 120GB of AIC). You could lose it all if your camera is dropped. I suggest you get in the habit of importing from your camera on a regular basis.
I agree, it is not a good idea to accumulate so much footage in the camera. But these were downloaded from the camera way back before I even bought the iMac. At that time, the only device that can deliver 1920x1080 video to my shiny 50inch TV in the living room was the camcorder! (and the OTA antenna). So I kept the clips in the camcorder, even after taking regular backups to the hard disk. That way I can show the clips to friends and family in full HD glory!
BTW 12 Gig is just 2 hours in HD. It is not much. I dread bringing my second backup 4 hours of our trip to Anguilla, St Marten etc. We all know HD requires ooodles and oodles of data and storage. I am not really complaining about the disk usage. My most important beef was: iMovie imports AVCHD from the camera easily. But it is unable to start from a AVCHD folder in the internal hard disk and start reading it. I can burn a DVD-ROM with AVCHD directory in the root and it reads it. I can copy AVCHD folder to the root of a thumbdrive and it reads it.
But put the very same AVCHD deeply nested in the external drive it barfs.
I am going to experiment after going home. I will create a symbolic link to the AVCHD folder from the root of the external disk. Heck, I am root here, I can even do an ln -s /nested/directory/deep/in/the/external/drive/AVCHD /AVCHD
and see if I can fool iMovie to import the files without creating a diskimage. If someone who has immediate access to iMac would do the experiment it would be very helpful

When importing, de-select images I want removed from disk. After import they are still there?

When I take all the raw images from my card and put in a new folder on my desktop. I then move folder to my pictures folder on a MAC/lightroom 4.Then open up LR and select onlyy images I am interested in and (remove from disk) ones I don't want. Then import to lightroon, for some reason they are still in folder in pictures?

It is not very clear what you are exactly doing.
Did you import them all and want to delete after importing , then :
The choice you get is:
Remove ( from Lightroom) and
Delete from Disk, it is only the latter that will delete them from your disk.
During import you can not delete not selected files.
Frans

Importing Akai disk image file

I've just switched from Cubase SX4 to Logic Pro 8. Unfortunately I'm unable to use my library of Akai disk image files stored on my hard drives. Isn't EXS24 able to load from image files, like Halion does?
I went through the whole process of storing the CDs on my hard drive, because Halion lets you load directly from image files, making this method far better than using the actual CDs...
Help would be appreciated.

Go into Project/Project Info... and see if single-layer is selected in the pop-up. If it is, it should create a disk image to fit on a single-layer DVD-R.
I recommend a disk image burned to Verbatim DVD-R at 4X or slower using Toast or Disk Utility. You can set burn speed in iDVD '08 if not creating a disc image.
David Pogue also recommends Verbatim on page 356 of his iDVD 6 book:
iMovie HD & iDVD 6: The Missing Manual
Quoting David: "Cheaper brands don't use the same amount of organic dyes and are more likely to suffer premature deaths."
I buy Verbatim white inkjet printable in stacks of 50. Verbatim's part number: 94971. They have been flawless for me.
*Burning speed*: Go into the menu > iDVD/Preferences/Advanced. Look at the bottom of that window.

Burn Failure - Image Incomplete

I'm having trouble burning a DVD. Done this lots of times before with other projects but this is the first DVD made of up entirely photo slideshows rather than movie and slideshow.
The burning proceeds fine until the 'cleaning up' stage, which fails. The disc spews out, an error message telling me that the image is incomplete appears and then nothing happens. I have to force quit.
The DVD works fine, except that the last of three sections doesn't work properly. The menu motion works. The buttons are all there, but they don't do anything. The photos files of these slideshows are on the DVD, but saved with their original titles rather than the changed titles that I have given them (and they still have) in iPhoto.
I've checked the log. Burning finished. I've repaired permissions. I've deleted the iDVD plist and restarted,
Any ideas?

Save as Disk Image worked and revealed the problem with the other method. I can't burn the finished disk image to DVD because it is 8.5GB. Why then does the iDVD status window say that its 3.8GB and attempt to burn it?
I will obviously have to trim the DVD - slit it on to two discs maybe. I have multiple slide shows and have added all the files to the DVD, which obviously causes the problem. All the original photos are included as well, even though I have not selected this option. In addition, all the photo titles have reverted back to the original imported names rather than those I have given the photos in iPhoto, which makes having the files on the DVD less useful as an archive anyway.
Thanks for your help. The saving as a disk image at the burning stage was a new thing to me.

Unable to burn AUDIO to DVD or Disk image, video is fine

As many other posts have stated; I am unable to burn the Audio portion of an iDVD nor does "save as disk image" transfer the audio of my iDVD. Transferred an iMovie, (an iPhoto set of photos with iTunes audio imported into iMovie) to iDVD. Audio plays on iMovie, audio plays on iDVD preview. Tried removing recommended ~com.apple.iXXX.plist, no help. Tried different encoding methods: i.e. Best/High/Professional. Tried saving to different sizes HD/Large/etc. Tried Share Media in iTunes, Media Browser, etc. Checked Main Audio, volume slider bar in iDVD. Tried importing audio into iDVD rather than transferring from iMovie. It doesn't seem to matter how I build the iDVD it works, until I go to Save As Disk Image or Burn DVD. Video works great (better in Large than HD) Audio doesn't transfer.
21 total minutes, 1.15GB of final iDVD using a default theme.

Hi
(an iPhoto set of photos with iTunes audio imported into iMovie) to iDVD
Yes this is the problem - in iTunes there is a copy-protection that moves over
Result
• Plays well in iMovie
• Plays well in iDVD preview
• Silent on DVD
Only way around this is to in iTunes collect needed audio into a play-list
Burn this out as an Audio-CD and .aiff (NOT .mp3)
Use the audio on this CD in Your iMovie project.
Yours Bengt W

How do I convert TC sparse bundle to disk image?

Ok, this question could be cross-listed under a number of threads, so I had to just pick one...
A few months ago, the HD in my MB was clearly dying, so I replaced it with a larger, faster drive. All good, until I realized I had been close to maxing out my Time Capsule before I upgraded my MB's HD, so I upsized that, too.
Fast forward 2 months.
I have a weird problem where iPhoto events start going dark. The database had these previously imported files listed, but the files themselves were nowhere to be found! The event in iPhoto showed black squares where the images used to be, but even looking in finder... No pics!
I want to go back into my old (saved) HD that I pulled from my Time Capsule. I stuck it in an external USB enclosure, and hooked it up. I told Time Machine to use it as the backup, but after it 'verified' it, it didn't show me the archived files. It does show a 'sparse bundle' in finder, which I understand is similar to a disk image. So is there a way to convert the sparse bundle to a disk image? Do I need to plug my old TC HD back into the TC to get to that archive?
Help! Among the lost photos are ones from a trip to Australia and my grandmother's memorial service. I need to get these back!
Thank you in advance.

tgilk wrote:
I've already done the TC surgery once before and the hardest thing was loosening the adhesive on the rubber pad / gasket on the bottom of the unit. After that, I completed the HD replacement in about 15 minutes... piece of cake. There's actually a good tutorial on AppleFritter. But I digress...
It's not too much of a digression. Remember that if you are just firing up the Time Capsule with the old hard drive, you don't have to reassemble it. Just swap out the plugs from the old drive to the new and turn it on. A true PC geek never runs with the cover on.
However, messing around with adhesives and thermal paste introduces a new element of risk. If you know the dates that have good data, and you are comfortable merging the newer photos back in, accessing the data via the Finder on an external enclosure would be faster and safer.
So, can I turn the TM backups off and still enter 'TM' to browse through the backups on the drive? I've ID'd the specific dates of my missing photo events, so as long as I can get into the backup, I will know just what folders to search for in the 'Originals' folders in the backup.
Yes. That is probably one of the most important and least known tips about Time Machine. You can still use it even if the backups are turned off. Furthermore, if you ever start to have problems on your machine, you should turn off Time Machine to avoid further corruption of your backups.

DVD burned from a disk image won't work on different computers???

Under the directions for how to burn a DVD from an disk image, the Apple Help document (http://docs.info.apple.com/article.html?artnum=93006) says this:
"Note: When burning a disc from a disk image, the burned disc will have the same format as the disk image. If you need a disc that will work on different computers, burn the disc in the Finder."
Does this mean that the DVDs that I am burning from the disk image won't be able to be played on a PC? a Mac other than mine? Neither? WHAT? I am planning to sell the DVDs of a workshop I present -- to people who may be playing them on PCs. Should I not be using this method (burning from a disk image) to burn my DVDs?
PowerBook G4 Mac OS X (10.4.9)

Under the directions for how to burn a DVD from an
disk image, the Apple Help document
(http://docs.info.apple.com/article.html?artnum=93006)
says this:
"Note: When burning a disc from a disk image, the
burned disc will have the same format as the disk
image. If you need a disc that will work on different
computers, burn the disc in the Finder."
Does this mean that the DVDs that I am burning from
the disk image won't be able to be played on a PC? a
Mac other than mine? Neither? WHAT? I am planning to
sell the DVDs of a workshop I present -- to people
who may be playing them on PCs. Should I not be using
this method (burning from a disk image) to burn my
DVDs?
Video DVDs are in the UDF format. The disk image you created is in the UDF format. When you use Disk Utility to burn the disk image to writable media, the new discs will be in UDF format and all will be well.
You are doing things correctly.
BTW, unless you have an external burner with lots of cooling, if you expect to use the burner in your Mac (which DOESN'T have lots of cooling), it's a good idea to pause between discs to allow the burner to cool down. (BTW, this comment is based on the reported results of several people in the forum. If you don't allow the cool down timer, you will start to create 'bad' discs. Also it is VERY important that you reduce the burn speed in Disk Utility to 4x or lower in order to create discs with maximum compatability with players. (You should see a way to change the speed in Disk Utility afterr you have inserted a disc.)
F Shippey

Source Material error when burning disk image

Well, I've been haunting these forums for 10 days, finding answers to every darn problem under the sun I've encountered! (thanks folks, I've been near hysteria) Now I have yet another problem, and I cannot find an answer in the forums (sorry if it's there.)
I have built my movie in iMovie, imported to iDVD, created my disk image, played my disk image (worked perfectly), connected my brand new LaCie external burner, loaded Toast 6 Lite, dragged my mounted disk image icon into the window, popped in my Verbatim DVD+R and let 'er rip.
And, poo, I'm informed that 4 files are in an unsupported format and cannot be imported. EH? I thought the disk image kept all self-contained? I press onward, and hit burn. Churning, churning... and then this message:
"Could not record disc because there is a problem with the source material. Result code= -18774"
Trying to burn via Disk Utility doesn't work either. My mounted disk shows up, but when highlighted the burn button is grayed out. Only when I click on the .img file is the burn option lit.
Am I supposed to drag the .img file rather than the mounted little disc icon? PLEASE HELP. These movies were SUPPOSED to be Xmas presents... now I'm praying for Michaelmas gifts!
TIA

ohmygosh. Lightbulb! I've been trying to burn the file_name one and not the file_name.img one. I assumed the point of mounting the file was to burn it, but it's only to preview it, yes?? So, I did that via Disk Utility, and it worked!! Only thing I can't figure is how to set the burn speed. I know slower is better, but can't find the place to tell it the speed. It never asks.
Toast still gives me the source material error. I do have the 'video' tab selected, and I've done the drag-n-drop method AND the 'add' method ('copy' is only for transferring data from one CD/DVD to another in my version, evidently). Toast doesn't allow me to grab the .img file, so I'm assuming IT wants the mounted file_name one? I'd still like to be able to use Toast to burn, so a solution to this would be appreciated. I'm using Toast 6 Lite, BTW.

Unable to create restore disk image with Disk Utility

I've tried three times in order to create a restore image of the users' volume of my Powerbook. I followed exactly the procedure explained typing "man asr" in a terminal window. I booted the Powerbook in target disk mode while connected to my iMac G5 from which Disk utility was run. Every time the disk image creation failed with a log report like this:
Creating Image HOME_HD.dmg
Initializing...
Copying...
/Volumes/HOME_HD: Authentication error
Initializing...
Finishing...
Initializing...
Creating...
Copying...
could not access /Volumes/HOME_HD/./Users/delos/Music/iTunes/iTunes Music/David Bowie/The Best Of David Bowie 1974-1979/01 Sound And Vision.m4a - Input/output error
Finishing...
Unable to create HOME_HD - Input/output error.
I don't know how my imported music could create such a problem to Disk utility, nevertheless I removed the incriminated song from the Music library but another one raised to be not accessible. Then I booted the powerbook from the supplied Tiger DVD too, and I got an error over the music file, something about an allocation that was 190 instead of 1, I got the volume repaired from Disk utility but the Disk image creation failed again without any hint because booting from DVD does not allow to save log file anywhere. Why on Earth I can't manage such a critical task as back up under Tiger while using Panther everything worked like a charm following the same procedure? Is anyone experiencing something similar?
Greetings
Gianmarco

Hi Lee, thank you for your answer, indeed I've just read carefully your article few hours ago, while I googled the net to find some hints on my issue. I think that I've followed exactly the right procedure to make the back up image, and can't find what is wrong. Actually Disk utility Repair disk successfully repaired the allocation bit (whatever that means) of the music files but that wasn't enough to let the creation of the disk image. Quite odd that the music files where recognized as messed up by Disk utility only booting from Tiger DVD and not while the Powerbook was connected to an iMac running Tiger too.
I'll do further investigation during weekend.
Greetings
Gianmarco

Hard Drive and Disk Image not mounting

Hey everyone,
I'm running a G5 Dual 2Ghz. with OSX 10.5.8 I'm having problems with a back up hard drive. It is an external Western Digital My Book 1.5TB SATA drive. After using it for a few months, it suddenly did not mount anymore.
*1) It also would not appear in Disk Utility.*
a) Disk Warrior couldn't find the drive (I think because it's formatted with FAT32)
*2) I then took the drive out of the enclosure and put it in the spare bay in the G5.*
a) It didn't mount
b) It did show up in Disk Utility
c) In Disk Utility it wouldn't give me the option to Repair Disk Permissions or Repair Disk
d) In Disk Utility is says under Partition Scheme: Unformatted
e) In Disk Utility I don't have the option to mount/eject only gives me the "info" option
f) Tech Tool did find the drive and it passed all tests
g) Disk Warrior still did not find the drive
h) TestDisk finds the drive, but does not find any partitions
*3) I then created a disk image of the drive in Disk Utility onto an external hard drive. The image comes back at 320GB, which seems to be about right I think.*
a) The disk image would not mount with Disk Image Mounter. It would say there is an Unrecognized File System
b) In Disk Utility - I don't have the option to Repair Disk Permissions
c) In Disk Utility - When trying to Repair Disk - I get the error: Repairing Disk failed with error Unrecognized FileSystem
d) In Disk Utility - If I click Open - The Log file says:
+Attach Image+
Initializing...
Verifying...
Finishing...
+Image of "disk0.dmg" attached successfully+
+Mount of "disk0.dmg" succeeded+
-But it is no where to be found
e) Disk Warrior can not find the Disk Image
f) I took the new external drive with the Disk Image to 3 other mac computers but the image would not mount
*4. Other things I've tried when opening the Disk Image for the new external drive.*
a) in Terminal - hdiutil attach -nomount "volumes/untitled/disk0.dmg"
b) in Terminal - sudo hdiutil attach -nomount "volumes/untitled/disk0.dmg"
c) Deleting files System/Library/Extensions.kextcache
System/Library/Caches/com.apple.kernalcaches
ALL UNSUCCESSFUL
I'm running very low on ideas. I know I could just erase the drive and reformat it, but the files on it are very important and must be recovered.
Any help or suggestions would be very helpful. I will not have time until after the weekend to try more things. Thanks in advance if you do not hear back from me until after this weekend.

Yes, it will. But if DU says the disk is unformatted then it is also not accessible. If you have files you don't wish to lose then you will need to try recovery software:
Basics of File Recovery
General File Recovery
If you stop using the drive it's possible to recover deleted files that have not been overwritten by using recovery software such as Data Rescue II, File Salvage or TechTool Pro. Each of the preceding come on bootable CDs to enable usage without risk of writing more data to the hard drive.
The longer the hard drive remains in use and data are written to it, the greater the risk your deleted files will be overwritten.
Also visit The XLab FAQs and read the FAQ on Data Recovery.

Disk Utility not copying all files when making disk image

My OS is 10.6.5 and everything is up to date.
I have a dvd that was burned for me of a play my child was in. It was probably burned on a PC using out of date software for all I know. But it plays in a DVD player and also in DVD player on my Macbook.
I want to be able to share clips of it online with friends, and that has all been just fine importing from the disk image I created of the DVD using Disk Utility, using IMovie 09 to edit it.
HOWEVER when I got to the end of act one, chapter 7 in the DVD is only about 3 minutes in length. The disk image I created using Disk Utility does NOT include any chapter 7 (which happens to be the ending of Act 1) and so I cannot import it into I Movie in order to add it to my mp4.
When I explore the DVD itself with my macbook, it only lists twelve files (various BUP's and IFO's and VOB's etc) -- here they are sorted by file name
VTS022.VOB
VTS021.VOB
VTS020.IFO
VTS020.BUP
VTS013.VOB
VTS012.VOB
VTS011.VOB
VTS010.IFO
VTS010.BUP
VIDEO_TS.VOB
VIDEO_TS.IFO
VIDEO_TS.BUP
Now, when my husband took the disc and created a .dvdmedia file in it and I explore that, there are 14 files. All of the same 12 files plus two more. (The DVD itself has 13 chapters but the main menu doesn't allow you to select them.)
the other two files in the .dvdmedia package are
VTS020.VOB
VTS010.VOB
But I can't do anything with that .dvdmedia file except watch it.
So I'm trying to figure out how to at least grab even just that last 3 minutes from Act 1 either from the original disc or from the dvdmedia file, using Imovie. So far having no luck. Disk Utility leaves it out and it's my only bridge from a burned DVD to Imovie. I've tried creating a DVD master and also an ISO using DVDRipper and that does the same thing. Also if I open the original burned DVD with Finder it only shows me the 12 files not the 14 that show up when using DVD Ripper to create a dvdmedia file.

Janet.b wrote:
About 3 years old...pretty dated now I guess. Am thinking I may just need to have it upgraded by a Mac tech.
For what the Apple Store's charge you can buy almost buy a new computer.
Just for giggles I brought my old laptop in for a drive upgrade and asked, they wanted $600 for a drive that only cost $120 at the time and it was a slow 5,400 RPM drive. The new Mac's of a similar make were going for $1000.
I did the drive replacement myself, got a faster drive of better quality for $300 instead.
Then another time I asked for a RAM upgrade from 4GB to 8GB, they wanted to charge $400 + $35 for the labor.
The same RAM is on Crucial.com for $90 and all I need is a 00 micro phillips screwdriver.
So you see what's going on here.
I think what you should do, if your out of warranty/AppleCare, is to call up the local PC tech guy who also does Mac's and have them fix you right up.
They can offer more personalized care which you need. Clone your old drive to the new and everything.
With Apple they are overworked at the Genius Bar and just place roadblocks so you buy a new machine instead.
For instance, all new iMac's now have proprietary drive software installed on the hard drives for heat monitoring. So now the only choice a user has is to bring their iMac into a Apple Store for a very expensive drive upgrade, which a person then decides the money is better spent buying a new machine.

Creating a disk image from an audio-disc???

Hello guys, I need to move residence and want to minimize the volume and weight I'll need to carry.
I wanted to create disk images of all my audio discs but apparently that's not possible (at least with disk utility, trying to use the same process used with software/movies discs). Is there any way to achieve this? Or, is there any other good way to store the songs in case I needed them later?
What I'd like to do is have them stored in my external hard drive in an uncompressed, unconverted format ready to burn them back, without any loss, to a cd playable with the basic cd players in case I needed them. Or to re-import them into a iTunes. And stuff like that.

I use Toast Titanium to do this. http://www.roxio.com/enu/products/toast/titanium/overview.html

Why archive AVCHD as disk images, versus .MOV or .MP4?

I get an interesting array of responses to this everywhere I ask...but most of all I'm curious about the opinions of folks who specifically use FCPX for editing, so I'd greatly value your feedback.
Like many folks who have been shooting AVCHD for a while, I now have many years worth of footage from a variety of cameras stuffed into my backup/archive workflow. For all those years, I've been keeping perfect disk images (generally non-compressed, read-only .dmg files created in Disk Utility right off cards and cameras) of every single one of those AVCHD shoots. In the early days of the format, when support was far, far more twitchy and frustrating than it is today, I felt it made sense to have a little "healthy" paranoia.
These days, however, I wonder if this isn't a colossal waste of time and storage space?
Here's the thing about this method...nothing ever gets deleted. You end up sucking every little take, every borked shot, every mishap, into your diskspace, cloud storage, tape library, or whatever you use for archival, forever. When I stop to think objectively about this, it seems nuts. I mean, if I did this with photography, my photo library would be 2x to 3x its current size and full of garbage. It would also be hard to navigate, which come to think of it is a major annoyance with all my AVCHD disk images. I keep them well organized, but still, having to mount them to look through videos (and then having to climb down into the "STREAM" subfolder each and every time) feels like a hassle.
I wonder if I should just go back, bust open those old disk images, use something like ClipWrap or Media Converter to repackage all those .MTS clips in something more portable (like Quicktime or MP4 containers) and just keep around the ones I actually want? There's no quality loss in doing so, and the video/audio content would continue to be usable in both FCPX and pretty much any modern multimedia software, right?
My question is what, if any, good argument is there in 2012 for keeping complete disk images of AVCHD?

Hi Neil,
Sorry about all the frustration.
Why does GB output an iMovie generated video podcast as .mov and Final Cut export to iPod as .m4v?
I don't have the newest GarageBand, so can't really say. But I do know that Final Cut will export a movie in different formats. If you choose the default setting for the iPod, you will get a high quality file, but it will be HUGE! Takes a long time to download, and takes a lot of server space.
This isn't too much of a concern if you have just a few movies and they are short, but if you make many long movies, it's a big problem. We produce a movie every week that's about 40-45 minutes long, so we use the QuickTime .mov as well as the MP4 export from Final Cut Express and encode them as H.264 using settings we've refined to make the file size small. Last week's 38:33 minute talk was 61.1 MB for our large 480x360 .mov video, and 35.5 MB for our 320x240 .mp4 videocast.
The extension on a H.264 file could be .mov (our large video) or .mp4 (our videocast). .m4v can also be H.264 (the default iPod QT setting).
The encoding (like H.264) is the most important part - you want to make something that looks good, sounds good, and streams well.
Hope this is helpful.

Disk image incomplete import

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