10 Replies Latest reply: Aug 21, 2009 2:34 PM by marasat
marasat Level 1 Level 1 (0 points)
Ok, so I construct a perfectly focused slideshow in idvd, then burn to a dvd and presto,all photos blurry whether viewed on my iMac that produced it or thru a dvd player on TV.
the photos are in jpeg format.
I enhance each photo ( sharpness etc) and when played back in preview mode on my mac are fine.
What am I doing wrong? I thought Magic iDVD was supposed to remove the hassles,not create them!

imac, Mac OS X (10.5.6)
  • Terence Devlin Level 10 Level 10 (134,895 points)
    Ok,


    Ok you too.

    so I construct a perfectly focused slideshow in idvd,


    This is the iPhoto forum, the iDVD forum is here

    http://discussions.apple.com/category.jspa?categoryID=128

    the photos are in jpeg format.


    JPEG is a heavily compressed format. DVD is a very heavily compressed format. So you’re putting compressed data into a heavily compressed format. A lot of material is chucked away in the process, so there are bound to be consequences.

    I enhance each photo ( sharpness etc)


    Depending on what you use to edit, you will be bringing in at least one level of generational loss to the process.

    You’ll get best results using a lossless format for the pics - tiff for example.

    Regards

    TD
  • marasat Level 1 Level 1 (0 points)
    Right. So basically, if I use jpeg format for my photos,edit using iPhoto software,create a slideshow in iDVD and then burn to a dvd,I'll end up with blurry photos every time?
    They didn't mention that in the online tutorial!
  • Terence Devlin Level 10 Level 10 (134,895 points)
    Right.

    No.

    But it runs on the GIGO principle. It all depends on the quality of the original jpegs. And to remove that variable, use a lossless format.

    Regards

    TD
  • marasat Level 1 Level 1 (0 points)
    Thanks for that. Time to move on from jpeg format obviously.

    Cheers
  • Old Toad Level 10 Level 10 (130,010 points)
    I've not used the Magic iDVD option so don't know what it does with the photos you provide it but have create many, many iDVD slideshow projects with photos from iPhoto and have had extremely good results.

    I create an iDVD project, add a slideshow, move the photos I want (cropped to 4:3 size ratio beforehand) to the slideshow, add music and save the project as a disk image (this separates encoding problems from burning problems). I mount and play the disk image with DVD Player and once I'm satisfied all is well I burn the disk image to disk using Disk Utility or Toast as the slowest burn speed possible using top quality media, Verbatium, Maxell or Taiyo Yuden DVD-R, which are the most recommended in these forums.

    Since I'm not familiar with Magic iDVD tell me a couple of things: are you creating the slideshow in iPhoto or just making the still photos available to iDVD by placing them in an album for export to iDVD?

    If you're creating the slideshow in iPhoto and use the Ken Burns effect the image size should be a minimum of 1440 x 1080 pixels in size to help keep the image sharp during the zooming of the KB effect. The output resolution of DVDs is 720 x 540 - a DVD standard and not iDVD issue. The slideshow is converted to a Quicktime movie format for use in iDVD. Then iDVD encodes the QT file again in its process. That's a lot of compression from the original source files.

    For what it's worth here are some tips for preparing photos for use in iDVD that might help:

    http://docs.info.apple.com/article.html?path=iDVD/7.0/en/6675.html

    http://www.scantips.com/basics1f.html




    TIP: For insurance against the iPhoto database corruption that many users have experienced I recommend making a backup copy of the Library6.iPhoto (iPhoto.Library for iPhoto 5 and earlier versions) database file and keep it current. If problems crop up where iPhoto suddenly can't see any photos or thinks there are no photos in the library, replacing the working Library6.iPhoto file with the backup will often get the library back. By keeping it current I mean backup after each import and/or any serious editing or work on books, slideshows, calendars, cards, etc. That insures that if a problem pops up and you do need to replace the database file, you'll retain all those efforts. It doesn't take long to make the backup and it's good insurance.

    I've created an Automator workflow application (requires Tiger or later), iPhoto dB File Backup, that will copy the selected Library6.iPhoto file from your iPhoto Library folder to the Pictures folder, replacing any previous version of it. There are versions that are compatible with iPhoto 5, 6, 7 and 8 libraries and Tiger and Leopard. Just put the application in the Dock and click on it whenever you want to backup the dB file. iPhoto does not have to be closed to run the application, just idle. You can download it at Toad's Cellar. Be sure to read the Read Me pdf file.


    NOTE: The new rebuild option in iPhoto 09 (v. 8.0.2), Rebuild the iPhoto Library Database from automatic backup" makes this tip obsolete.
  • marasat Level 1 Level 1 (0 points)
    I basically hit the Magic iDVD button in iDVD mode, drag the photos from the iPhoto library,hit 'create DVD project' and then burn.
    I don't use Ken Burns effect.
  • Old Toad Level 10 Level 10 (130,010 points)
    What size are the photos, in pixels, that you're adding to iDVD to use? Are they larger than 640 x 480? I've made a lot of iDVD slideshows and I've had great success with the final project, even when played on a 50" plasma TV. However, they are not as sharp as when displayed on my Mac with iPhoto or other photo display applications. It's just the nature of the beast.

    By blurry do you mean pixelated or blurry in the photographic sense. I did a quick search of the iDVD forum and got these results: http://discussions.apple.com/search.jspa?threadID=&q=blurry&objID=c128&dateRange =last90days&userID=&numResults=30. You might refine the search to see if you can narrow down the topics.
  • marasat Level 1 Level 1 (0 points)
    on average about 3000x2000.blurry in the sense of sharp focus in iDVD, out of focus once burnt to dvd and played on a TV.
    I followed your steps for creating a new new project etc.
    pardon my ignorance but once I saved the project as a disk image it then appears as an .img file on my desktop.
    you mentioned you then mount and play to cfm quality.whewn I double click on the file it comes up with Video_TS and Audio T_S. Thats where I get lost!
    Have I followed the steps correctly to get to this stage? The DVD project rendered and finalised ok.Really appreciate your input so far on this.
  • Old Toad Level 10 Level 10 (130,010 points)
    Once you get the disk image mounted so you can see the Video_TS folder, etc. launch DVD Player. It will detect the disk image and you can then play it.
  • marasat Level 1 Level 1 (0 points)
    Brilliant. Burned to a DVD without the bluriness! Many thanks for the advice

    Cheers