13 Replies Latest reply: Jul 2, 2012 9:19 AM by mishmumken
LivelyJamesS Level 1 Level 1 (0 points)

I exported a short video of mine from Final Cut Express and the size of the file came out to 7.3 GB. When I put it into an iDVD project, it says that the file is only 800 MB. I tried just burning it onto a dual layer disc anyway to see if it might still burn at the original file size, but the disc came out unusable for some reason, and obviously hadn't been burned anywhere near full-capacity. So, I tried it again, and the exact same thing happened.

 

I guess my first question is: why is iDVD changing the size of the file? I want the quality to be the best it can be, so keeping it at 7.3 GB as opposed to 800 MB is rather important.

 

Secondly, why did the dual layer discs come out unusable? I've burned single layer discs before and they haven't been an issue. Also, I know for a fact that the drive can burn dual layer discs, so that isn't the issue.

 

Thanks in advance to anyone who can provide me with help on this issue.

  • 1. Re: Why does the file size change when put into an iDVD project? And problems with dual layer discs...
    mishmumken Level 5 Level 5 (4,000 points)

    LivelyJamesS wrote:

     

    I exported a short video of mine from Final Cut Express and the size of the file came out to 7.3 GB. When I put it into an iDVD project, it says that the file is only 800 MB.

     

    Guessing here but it looks like you edited/exported an SD/DV sequence of about 30 min in FCE. DVD needs to be MPEG-2 so iDVD compresses the original file down to the size that you report.

     

     

    LivelyJamesS wrote:

     

    I guess my first question is: why is iDVD changing the size of the file? I want the quality to be the best it can be, so keeping it at 7.3 GB as opposed to 800 MB is rather important.

     

    The quality will be what the MPEG-2 compression and the software allow for. MPEG-2 is DVD standard .... there's no way around that.

     

     

    LivelyJamesS wrote:

     

    Secondly, why did the dual layer discs come out unusable? I've burned single layer discs before and they haven't been an issue. Also, I know for a fact that the drive can burn dual layer discs, so that isn't the issue.

     

    Guessing again but it would seem that you burned a Data DVD instead of a Video DVD which would be unusable by a set-top player. As I said above you can't get around DVD standards.

     

    If by any chance your video was HD originally you can try to go the Blu-Ray route using Roxio Toast or FCS 3 (discontinued) or FCP X. You will also need a Blu-Ray burner.

  • 2. Re: Why does the file size change when put into an iDVD project? And problems with dual layer discs...
    LivelyJamesS Level 1 Level 1 (0 points)

    mishmumken:

     

    I greatly appreciate your help, although I have a couple more inquiries.

     

    This probably isn't that relevant, but it's a 14-minute short: 12 minutes are HD video shot from a Canon T2i (so, already compressed) and 2 minutes are credits.

     

    I also can't believe I forgot about DVDs and MPEG-2. Definitely something I should have known. Now the question is: how can I create a higher quality MPEG-2 version of the file than iDVD is automatically encoding? I know I can do it from Final Cut Express, but I've tried something similar in the past and have ended up with ridiculously huge files. We're talking 7 GB files turning into 200 GB files. I suppose I would just like to find a way to utilize all of the space on a dual-layer disc, assuming that would allow the greatest quality possible.

     

    Also, I know that I definitely didn't burn a data DVD. I did it all in iDVD and hit the "burn" button in the program itself, so I'm still confused about what the issue is there.

  • 3. Re: Why does the file size change when put into an iDVD project? And problems with dual layer discs...
    mishmumken Level 5 Level 5 (4,000 points)

    If your footage was from a T2i you probably edited in an HD timeline using AIC and exporting a self contained Quicktime movie with current settings (that is exactly the sequence settings). If that was not the case please post your exact workflow.

     

    Just import the resulting file (from the export) into iDVD and set the encoding to "Best Performance" which is best for all content up to 60 minutes as it encodes with a constant bitrate (CBR). Note that "Professional Quality" will probably also give you good results but the variable bitrate encoding is not necessary for this short a video and encoding times will rise disproportiantly.

     

     

    LivelyJamesS wrote:

     

    I suppose I would just like to find a way to utilize all of the space on a dual-layer disc, assuming that would allow the greatest quality possible.

     

    There is no point in using a DL-DVD for 14 minutes of video. Thing is you can't raise the bitrate (read quality) over a certain point (7.3 - 7.5 kbps) so your file size will never be big enough to warrant the use of a DL-DVD.

    Again the DVD specs .... no way around it.

     

     

    LivelyJamesS wrote:

     

    Also, I know that I definitely didn't burn a data DVD. I did it all in iDVD and hit the "burn" button in the program itself, so I'm still confused about what the issue is there.

     

    When you author a DVD in iDVD make sure you create a Disk Image (File > Create Disk Image) and check the playback with DVD Player. Then burn at slow speed with Disk Utility or Toast to avoid coasters.

  • 4. Re: Why does the file size change when put into an iDVD project? And problems with dual layer discs...
    LivelyJamesS Level 1 Level 1 (0 points)

    Well, everything is in control with the single-layer discs, but I'm still having trouble with dual-layer, although now I'm working outside of iDVD and simply trying to copy the .mov file. I've tried burning several DVD+R DL discs, at the lowest speed possible, and the disc either doesn't read afterwards or the file is so corrupt that it lags like heck (really? you can't type "****" on here?). Any suggestions?

  • 6. Re: Why does the file size change when put into an iDVD project? And problems with dual layer discs...
    LivelyJamesS Level 1 Level 1 (0 points)

    Nobody has any ideas as to what's occurring with the dual layer discs?

     

    This is kind of time-sensitive, so some help would be greatly appreciated.

  • 7. Re: Why does the file size change when put into an iDVD project? And problems with dual layer discs...
    Frank Miller2 Level 2 Level 2 (165 points)

    OK, I'll respond.  What you are trying to do makes no sense - a 14 minute video cannot be expanded to fit a 2-layer disc - or even fill a one layer disc.  The DVD standard allows some variations of 'compression' to get more video (time) onto a disc, but the BEST MPEG-2 encoding you can do allows about 1 hour of video on a single-layer disk.  You can't 'expand' the standard any more than that, so quit trying.

     

    Frank

  • 8. Re: Why does the file size change when put into an iDVD project? And problems with dual layer discs...
    mishmumken Level 5 Level 5 (4,000 points)

    LivelyJamesS wrote:

     

    .... but I'm still having trouble with dual-layer, although now I'm working outside of iDVD and simply trying to copy the .mov file.

     

    You are having trouble because of the wrong approach:

     

    • burning .mov file to DVD outside of iDVD = Data DVD

    • encoding/authoring inside a dedicated authoring app = Video DVD

    • As stated before: DL-DVDs are NOT needed here

  • 9. Re: Why does the file size change when put into an iDVD project? And problems with dual layer discs...
    LivelyJamesS Level 1 Level 1 (0 points)

    To clarify:

     

    Everything in iDVD has been sorted out. I've burned at least 10 single layer DVDS of the project with no problems.

     

    Now I'm trying to get a Data DVD with the .mov of the project. The file is a little over 7 GB and therefore will not fit on a single layer disc. So, I tried burning it to several DVD+R DL discs and none of them worked.

     

    Once each of them was burned I inserted them back in to check them. Some didn't even load onto the desktop - they just eventually ejected. Some did show up on the desktop, but the file wouldn't load or it would be ridiculously laggy.

  • 10. Re: Why does the file size change when put into an iDVD project? And problems with dual layer discs...
    mishmumken Level 5 Level 5 (4,000 points)

    LivelyJamesS wrote:

     

    Once each of them was burned I inserted them back in to check them. Some didn't even load onto the desktop - they just eventually ejected. Some did show up on the desktop, but the file wouldn't load or it would be ridiculously laggy.

     

    If the disc doesn't work at all I would suspect a burn error of some kind. What you can do is get high quality media such as Verbatim and burn at 2x.

     

    As for lagging playback: I suspect your Quicktime file is HD (AIC in your case) and that just might not play from a DVD. Try creating a disc image from either Disk Utility or Burn or Toast and see how that goes.

  • 11. Re: Why does the file size change when put into an iDVD project? And problems with dual layer discs...
    LivelyJamesS Level 1 Level 1 (0 points)

    Considering all of my single-layer DVDs came out fine (which are Memorex), I don't see why I would have trouble with the same brand when it comes to dual-layer discs. However, the suggestion sounds like it's worth a try.

     

    All of the dual-layer DVDs I've unsuccessfully burned were created by dragging the .mov onto the icon on the desktop of the blank DVD and burned after opening the DVD in a window and clicking on the "burn" button.

     

    I tried burning in disk utility a while back when it was suggested by someone here (perhaps you) and I simply couldn't figure it out. Any suggestions there would certainly be appreciated, as all of your previous suggestions have been.

  • 12. Re: Why does the file size change when put into an iDVD project? And problems with dual layer discs...
    Old Toad Level 10 Level 10 (115,700 points)

    Use the following workflow to help assure the best quality end product:

    Once you have the project as you want it save it as a disk image via the  File ➙ Save as Disk Image  menu option.  This will separate the encoding process from the burn process. 

     

    To check the encoding mount the disk image and launch DVD Player and play it.  If it plays OK with DVD Player the encoding was good.

     

    Then burn to disk with Disk Utility or Toast at the slowest speed available (2x-4x) to assure the best burn quality.  Always use top quality media:  Verbatim, Maxell or Taiyo Yuden DVD-R are the most recommended in these forums.

     

    OT

  • 13. Re: Why does the file size change when put into an iDVD project? And problems with dual layer discs...
    mishmumken Level 5 Level 5 (4,000 points)

    Copy all the files you want to burn to one folder. To create an image file, launch Disk Utility and select File > New > Disk Image From Folder. In the window that appears, navigate to the desired folder and then click on Image. Give the image file a name, and click on Save when prompted. Next select the disk image and burn to DVD.

     

    Or go here: http://burn-osx.sourceforge.net/Pages/English/home.html