Why exporting slide show to QuickTime raises contrast and darkens images?

I've been creating slide shows in iPhoto, then exporting them to QuickTime to create QT.mov files which contain dissolve transitions and later add soundtracks using QTPro. Lately, when I've exported the images to QuickTime, the resulting images in the QT.mov file are invariably darker and more contrasty than the originals in iPhoto; in many cases unacceptably dark.
It appears that QuickTime modifies the images when it exports them.
I've experimented in PhotoShop, and discovered that to make the original Jpeg image match the modified QT version I have to increase the "Contrast" slider +11, and decrease the "Brightness" slider about -8 to -12 (in whatever units PhotoShop sliders are calibrated in). This is an enormous amount of change to the images! Since darkening the image increases the color saturation, every image has some color shift. Black skin tones shift to a heavy red/brown, and shadow details block up unacceptably.
It seems that QuickTime is "auto correcting" the images; automatically applying the sort of tweaking that makes a lot of snapshots look "snappier".
Of course, I've already spent hours correcting my images in PhotoShop, and they're just perfect (IMHO) when I feed them into iPhoto.
iPhoto itself doesn't change anything.. the images are unmodified during the importing, editing and preview of the slideshow; it's only when it's exported to QuickTime that the images are ruined.
I'm hoping that there's some knowledgable soul out there in CyberSpace who knows a way to turn this hidden "auto-correcting" feature off.
G5 dual 2.3Ghz Mac OS X (10.4.6) Terabytes of disc space.

iPhoto can make two different types of slide show movies. It would help to know which you're making.
One is made via the File/Export to QuickTime movie and makes a 4 track file with a simple fade effect. These use the Photo-JPEG codec.
The other is a 30 fps "video" using H.264 video codec via the "Share" menu.
A third method (rarely used) is to Export to iDVD. This makes an absurdly high data rate MPEG-4 video. This is also found under the Share menu.
The MPEG-4 video codec also includes an "automatic" gamma correction feature which compensates for the gammas difference between Mac's and PC's.
Try one export to iDVD. Include your audio track prior but use a high quality (.aiff) sound file. No need to actually "burn" the DVD. You can even close iDVD after it opens. You'll find the new movie in your Users Movie folder.
Open it with QT Pro and export to a new .mov file. Adjust the data rate to something more reasonable and add some audio compression.
If the colors still look too dark you can use the built in Filters in the Export dialog. You can adjust B&C or HSL or even use ColorSync Profiles that can help correct the image quality (if needed).

Similar Messages

Exporting slide show from iPhoto to QT raises contrast and darkens images?

I have been using iPhoto to create slide shows (with transitions) which I then save as QuickTime (.mov) files. I add soundtracks to the QT.mov file in QuickTime Pro and burn the finished slide show to CD's for my friends and coworkers.
The original photographic image files come from several sources; mostly a digital camera, but often scanned color slides (from the dim, distant past). All of the images have been (painstakingly!) corrected in PhotoShop, and saved as finished size Jpeg files.
When I import the images into iPhoto, edit and arrange them in a folder and preview the show as a slideshow in iPhoto, the images still look perfect.
When I save the show by exporting it to QuickTime, all of the images get darkened and the image contrast increased.
This is making me nuts.
To quantify the unwanted "enhancement" that iPhoto seems to be applying to my images, I experimented in PhotoShop; I can make the original (correct) image match the "QT enhanced" image by decreasing the "Lightness" slider by -8 to -12, and increasing the "Contrast" slider by +11 (in whatever units PhotoShop sliders are calibrated).
The resulting change in the images is infuriating: the darkening increases the color saturation and blocks up the shadow details so that many images are unusable.. black skin tones, for example, become a dark red/brown color with an unnatural gradation from light to dark.
Further experimentation using IDVD and QuickTime slide shows (without transitions) made from sequencial files directly in QT seem to indicate that the problem is not in QuickTime itself, but rather in the transition from iPhoto to QuickTime when I export the finished folder as a slide show.
It seems like iPhoto is "enhancing" or "tweaking" the images as it exports them to QuickTime: It adds contrast and reduces brightness, both of which might serve to add "snappiness" to a lot of generic snapshots that people shoot, but my images have already been fixed (thank you) and really don't need anyone's generic "tweak"
Does anyone know what it's doing, and more importantly to me, how do I turn the damned thing off?
G5 dual 2.3Ghz Mac OS X (10.4.6) Terabytes of disc space.

iPhoto can make two different types of slide show movies. It would help to know which you're making.
One is made via the File/Export to QuickTime movie and makes a 4 track file with a simple fade effect. These use the Photo-JPEG codec.
The other is a 30 fps "video" using H.264 video codec via the "Share" menu.
A third method (rarely used) is to Export to iDVD. This makes an absurdly high data rate MPEG-4 video. This is also found under the Share menu.
The MPEG-4 video codec also includes an "automatic" gamma correction feature which compensates for the gammas difference between Mac's and PC's.
Try one export to iDVD. Include your audio track prior but use a high quality (.aiff) sound file. No need to actually "burn" the DVD. You can even close iDVD after it opens. You'll find the new movie in your Users Movie folder.
Open it with QT Pro and export to a new .mov file. Adjust the data rate to something more reasonable and add some audio compression.
If the colors still look too dark you can use the built in Filters in the Export dialog. You can adjust B&C or HSL or even use ColorSync Profiles that can help correct the image quality (if needed).

Cannot export slide shows with iPhoto 9.6 and OS 10.10

Hallo!
I upgraded to Yosemite last Friday. Everything seems to work fine only iPhoto 9.6 makes some troubles. I cannot export any slide shows. When I click on "export" the small window opens as always before, the first pic is shown in this window, after that the window disappears and nothing else happens. iPhoto doesn't crash, but it also doesn't export any slide shows.
Does anyone have an idea what the reason could be?
Thanks and best regards from Klosterneuburg/Austria
Andy

Some folks have fixed this by reinstalling iPhoto:
To re-install iPhoto
1. Put the iPhoto.app in the trash (Drag it from your Applications Folder to the trash)
2. Download it from the App Store to reinstall It's on your Purchases List* there.
For older versions that have been installed from Disk you'll need these additional steps:
2a: On 10.5: Go to HD/Library/Receipts and remove any pkg file there with iPhoto in the name.
2b: On 10.6: Those receipts may be found as follows: In the Finder use the Go menu and select Go To Folder. In the resulting window type
/var/db/receipts/
2c: on 10.7 or later they're at
/private/var/db/receipts
A Finder Window will open at that location and you can remove the iPhoto pkg files.
3. Re-install.
If you purchased an iLife Disk, then iPhoto is on it.
If iPhoto was installed on your Mac when you go it then it’s on the System Restore disks that came with your Mac. Insert the first one and opt to ‘Install Bundled Applications Only.
*Sometimes iPhoto is not visible on the Purchases List. it may be hidden. See this article for details on how to unhide it.
http://support.apple.com/kb/HT4928
One question often asked: Will I lose my Photos if I reinstall?
iPhoto the application and the iPhoto Library are two different parts of the iPhoto programme. So, reinstalling the app should not affect the Library. BUT you should always have a back up before doing this kind of work. Always.

Why is slide showing up blank in preview and publish, but not filmstrip view?

Hello,
I was having the problem I described in another post where data that was masked flips back to the unmasked value- however, this time I couldn't figure out any solution.
So, I tried copying the background image, putting it in an image editor, then pasting it back into Captivate and adding my highlight boxes (Captivate 3). It worked in Preview mode for a good hour, then I published and that particular slide showed up with white (no bkgrd. image) but you could still see the highlight box and mouse movement.
I shut down captivate then restart in preview mode and the same thing happened- worked until I published then that particular slide had problems again.
Any ideas? I'd appreciate them much. I feel like I've had every problem in the world with Captivate in the last month!
Dee

Absolutely confused... I did not suspect that my suggestion would lead to such inexpected behaviour.
I'll have to think more about it, which is difficult since I can't reproduce your problem.
Your idea to move the files from within Elements tells us something.
Maybe examining the log file could give some hints about the failures of Elements in the process.
http://helpx.adobe.com/photoshop-elements/kb/troubleshoot-install-using-logs-elements.html

Why does slide show play photos with jagged or distorted images?

This is weird. When I start a slide show, the photos immediately become distorted as they go from one transition to another. It's almost like the entire photo frame becomes "shattered" in several large pieces. Sometimes, when hitting the pause button, part of the photo is fine while the other part has lines all the way through it, obscurring that part of the photo. When playing music, there is no alteration in quality of the music; everything is normal.
What's going on here?
G4 Dual 450 Mac OS X (10.3.9)

Hi j4net,
Have you tried a different transition? It could be your 450 computer is not up to speed. (just a guess)

Why are slide show images less sharp than preview images?

Dear Aperture users,
as documented in the manual and on Apple's support pages, Aperture 3 uses the preview images for its slide show. However, when I compare the quality of my preview images in full-screen mode with the quality of the slide show images, the preview images clearly look sharper.
Apparently, Aperture's slide show does not simply use the preview images as documented, but applies some sort of "adjustment", resulting in less crisp looking images. Since I haven't found any satisfying answer yet, my questions are:
1). What exactly is the adjustment that slide show applies to the preview images?
2). Can I somehow tweak this adjustment, say, with a terminal command?
Best regards,
Dirk61.

iPhoto can make two different types of slide show movies. It would help to know which you're making.
One is made via the File/Export to QuickTime movie and makes a 4 track file with a simple fade effect. These use the Photo-JPEG codec.
The other is a 30 fps "video" using H.264 video codec via the "Share" menu.
A third method (rarely used) is to Export to iDVD. This makes an absurdly high data rate MPEG-4 video. This is also found under the Share menu.
The MPEG-4 video codec also includes an "automatic" gamma correction feature which compensates for the gammas difference between Mac's and PC's.
Try one export to iDVD. Include your audio track prior but use a high quality (.aiff) sound file. No need to actually "burn" the DVD. You can even close iDVD after it opens. You'll find the new movie in your Users Movie folder.
Open it with QT Pro and export to a new .mov file. Adjust the data rate to something more reasonable and add some audio compression.
If the colors still look too dark you can use the built in Filters in the Export dialog. You can adjust B&C or HSL or even use ColorSync Profiles that can help correct the image quality (if needed).

Aperture Exported Slide Show Does not show last few photos

I exported an Aperture Slide show for an AppleTV (720P). The slide show has over 2000 photos from a recent trip. The slide show is about 115 minutes long.
Everything works fine until about the last few minutes, the music works fine but the screen goes black for about 7 photos, comes back on for 2-3 then goes black for the last 5 or so photos. Does anyone have any idea why the end of the exported slide show is doing this? If I watch the preview on my MAC everything looks fine all the way to the end.

In my case it was because my hard drive was nearly full. I emptied the trash (had not done this in quite sometime) and it freed up a lot of disk space. The full slide show compiled fine after this. I found this when another recompile warned me that there was not enough disk space to compile. Hopes this helps.

Using export slide show from iphoto, I am trying to create a DVD of photos and vid clips in large format. The vid clips do not work using burn software. Any idea?

Using export slide show from iphoto, I am trying to create a DVD of photos and vid clips in large format. The vid clips do not work using burn software. Any idea?

Have used large format, but using the 'burn' software, I am not getting seamless video quality on DVD even though I am burning at 2* speed. Any ideas? Do I need better software? Or is there a problem with the SuperDrive?

Why export dump shows less than the actual size?

why export dump shows less than the actual size?

i tried to find to find out the logical size using the following command
select sum(bytes/1024/1024) from dba_segments;
SUM(BYTES/1024/1024)
739when i tried the following query removing index segement:
select sum(bytes/1024/1024) from dba_segments where SEGMENT_TYPE \<\> 'INDEX' ;
SUM(BYTES/1024/1024)
535What other type of information is not exported in a full database export?

AppleTV: How can I see what song is playing if I am viewing my photos in slide show mode on Apple TV and streaming from my iTunes?

How can I see what song is playing if I am viewing my photos in slide show mode on Apple TV and streaming music from my iTunes?
Thanks.

Thank you Winston. I guess we need to ask that this feature gets added at least as an option in an upcoming release. When someone is using shuffle, it helps to know what is playing while viewing pictures.
Where is my Apple request button when one needs it ? :-) Cheers, C

I'm using OS 10.91 and lately slide shows on some news websites and audio on Amazon have stopped working. Que pass?

I'm using OS 10.91 and lately slide shows on some news websites and audio on Amazon have stopped working. Que pasa?

From the Safari menu bar, select
Safari ▹ Preferences... ▹ Extensions
Turn all extensions OFF and test. If the problem is resolved, turn extensions back ON and then disable them one or a few at a time until you find the culprit.
If you wish, you may be able to salvage the errant extension by uninstalling and reinstalling it. Its settings will revert to their defaults. If the extension still causes a problem, remove it permanently or refer to its developer for support.

Why is apple showing p0rnography on itunes store and ibooks even if we have explicit content is blocked?!

Why is apple showing p0rnography on itunes store and ibooks even if we have explicit content blocked?! I am very unhappy about this. Especially being that it is plastered on the front page of itunes music store right now. (I am referencing S#X playlist by Omarion).

http://www.apple.com/feedback/

Poor DVD Quality for slide shows from quicktime

I have generated a slide show in QT and the quality is great. When I try to generate a DVD the quality drops significantly (very disappointing). How do I generate highest quality DVDs especially for slideshows.
Any help would be greatly appreciated.

You should take all your JPEGs and turn them into 720 x 480, then import them into a program like Final Cut Pro.
Put them all in the timeline.
Add sound or whatever, fades, etc.
Then export it out as a QT Movie, File>Quicktime Movie
Then add this to Compressor or DVD SP.
If you just add a .mov to DVD SP, your bitrates need to be set in the preferences.
DVD Studio Pro > Preferences > Encoding
Try 7.0 average, 7.4 high, 2 Pass VBR, Best
Sometimes fades on photos get messed up with lower bitrates.
7.0 is decent.
Set Compressor up with those settings as well if you are using Compressor.
If you just drag photos into DVD SP, you can do it that way as well, just be sure your preferences for your bitrate is higher.
What you had was pretty low.
Let us know how it goes.

My Exported Slide Shows look bleary

I am making music videos with Iphoto, I expert them to Quicktime format to put up on the web, but the images look bleary.
In particularly I made jpg slides with Keynote - images with text comments, saved to jpg format, through the files in to IPhoto, did a slide show and exported to Quicktime format.
I put them up on the web, the music sounds fine, but the images are so bleary it is hard to read the text of the keynote slides/jpg.
Anyone have suggestions how to make clearer slides, make a slideshow with good music and good video images?
Thanks,
JE

I fully agree and have the same problem. My .mac iWeb Site has several albums. On a PC (even with Safari) the slideshows are now useless because the images are tiny. Upgrading to iWeb 2 somehow shrunk down the slideshow. When I click on the individual pictures, they open up fine in the new iWeb 2 mode and I can even hit the download button fine to copy an image to my drive. However, hitting the slideshow button brings up tiny images! The slideshow is now all but useless for Windows users.
Hope someone can help out with this problem!
Thanks Klaus

Seeking workaround to export slide show @ 720x480 in iPhoto 06.

As you know the largest slide show you can currently export is 480x640, is there a workarond to get a 720x480 exported Quicktime movie?
As always thank you for reading and replying to my post,
Sebastian

Don't you mean 720 x 540? There are two possibilities. One is to create the slideshow in iMovie and use it's export options. The other is to use Quicktime Pro and re-scale it to the larger size in the QT Player and then do a save as to a new a self contained file. You might lose some quality that way, however.

Why exporting slide show to QuickTime raises contrast and darkens images?

Similar Messages

Maybe you are looking for