Ken Burns effect very irregular

Since installing version 5 (all versions through 5.04), the Ken Burns effect for slides has not worked smoothly. In the course of one slide show, no matter how many photos used, the pans can be slow then fast within the same slide or just sit there with no pan or just creep along extremely slow with bouncing seen on the margins or speed like a locomotive across the screen. Setting the time interval for the slides has little or no effect on how long the each slide will be displayed on the screen. For example, if you set it at 8 seconds, some slides stay on for 4 seconds, some for 15, etc.
All versions of iPhoto 4 worked beautifully with no problems.
I wish I could go back to version 4.
Any ideas on how to fix the problem?

Try cleaning out the various user and system caches with OnyX or a similar application.

Similar Messages

I'm looking for a High Definition Ken Burns effect

I put together an hour-long DVD every year of the best photos of my daughter. Every year I've used a program called *Still Life* to add the ubiquitous Ken Burns effect to about 25% of the stills. I've been very happy with the results.
But, lo and behold, we've upgraded this year to an HD television, and suddenly everything changes.
Now it is painfully apparent that *Still Life* can no longer do the job, as its output is noticeably non-HD.
I see how I can do the same basic movement in FCE itself using keyframes, but this movement is static. The thing I liked about *Still Life* was that it started the movement slowly, built up speed, and then slowed the movement at the end. It was smooth. I can't make FCE perform as smoothly. I get visual whiplash when it starts and stops.
I've found some other similar programs-- Photo-to-Movie, MovingPicture, etc.--but none of them output in the same high quality HD that FCE express does. I even tried *iMovie HD*, but it isn't flexible enough (you can't change the start or stop movement times, so that when I transition the clips in FCE, I lose the second before the Ken Burns effect kicks in, and so the overall effect is herky-jerky).
Does anyone have any suggestions for a software solution that exports high quality HD Kens Burns movement for a still photo?
Thanks for any help you can give.

Hi(Bonjour)!
I see on photo to movie spec page that you can export in full 1920 X 1080 H.264 codec, a high quality format usable in FCE.
http://www.lqgraphics.com/software/phototomovieoverview.php
By the way, how do you deliver your HD sequence from your mac to your HD TV set ?
Michel Boissonneault

Ken Burns Effects Don't Work in iMovie HD (I've Tried Everything)

Version:
OS X 10.4.10
iMovie 6
*Hardware 1:*
PowerMac G4 Dual 500 Mhz, 1GB RAM, Internal 40GB HDD and Internal 320 GB HDD
*Hardware 2:*
PowerBook G4 500 Mhz, 512MB RAM, Internal 20 GB HDD
Problem:
This problem occurs on both of my G4 Macs. In iMovie HD, I imported a JPEG from iPhoto with Ken Burns Effects on. The still photo appeared properly in the Clip Viewer initially, but appeared as a black screen in the iMovie Monitor. Once the imported photo with the Ken Burns Effects completed rendering, the clip in the Clip Viewer turned white and appeared as a white screen in the iMovie Monitor. I have tried almost everything I read about in these forums in search of a resolution.
*Resolutions that Failed:*
1. The photo is definitely a .jpg
2. Tried importing the actual .jpg file as well as importing from iPhoto.
3. QuickTime and all other Software updates have been applied and are running on the most current release.
4. Repaired disk permissions.
5. Created, saved and manipulated the iMovie file in the standard Movie Folder on my main internal hard drive. (i.e. – I'm not saving to an external HDD)
6. Created, saved and manipulated the iMovie file in the standard Movie Folder on my secondary internal hard drive. (i.e. – I'm not saving to an external HDD)
7. Deleted the 'mac.imovie.plist' file and created a new one.
8. Attempted to do apply the effects logged on as a different user.
9. Saved file, restarted machine and reopened numerous times but the problem persists.
10. Tried a lower resolution photo and the problem persists.
11. Attempted to import all the photos I planned to use, added transitions to all of the clips and rendered completely. Saved the file, restarted the machine and reopened the file with no change to the blank clips.
12. The iMovie trash emptying issue did nothing to help.
*Additional Notes:*
1. The problem is confined to the Ken Burns Effects in iMovie. I am able to work with true video clips without incident.
2. Ken Burns Effects operate properly in iPhoto 6 using the slideshow functionality.
3. I would use iPhoto, but it seems like it would be easier to line up specific sections of an audio track with certain Ken Burns Effects in iMovie. (i.e. – a crescendo at the 16 second mark of the audio track coincides with the end of a 'zoom' on a photo, transition from second 16-17 second mark, new photo at the 17 second mark and pan left to right from 17 second mark to the 25 second mark.) Point is that it lines up precisely with the markers on the audio track, which seems far easier to do in iMovie than iPhoto.
4. Please help me, I'm going nuts troubleshooting this bug! I can't find any resolution that works.
Thanks in advance for the help.
Message was edited by: Charlie Brown Jr.

Hmmm. You seem to have tried, without success, most if not all of the methods of resolving a Ken Burns black screen issue.
Some thoughts that have occurred to me:
1. Perhaps your G4 500mhz Mac is not fast enough. I think that the minimum spec for iLife '06 is 733mhz. Might have nothing to do with this problem, but I just mention it.
2. Are the sizes of your images too large, as can happen with some of these new high def cameras? iMovie has trouble working with very large images.
3. Do you have any 3rd pary plug-ins, particularly in Quick Time, that could be causing a conflict?
4. Do you have enough disk space for the project to operate?
5. Have you done a recent Quick Time update? Some users have reported a problem with that.
6. From your post, it appears that you have continuously worked within the same iMovie file that exhibits the Ken Burns problem. If this is true, try creating a new iMovie project and experimenting with a few clips to see if the problem persists in the new project.
Ken Burns issues can be very frustrating. I think that you will need to keep trying things until something works. Wish I could be more help, but perhaps some of the tech experts on this forum will have some workable suggestions.
There is an application called Photo to Movie that reputedly has a far better Ken Burns type of effect. If you can't resolve your problem, you might try downloading that app. I believe that it offers a demo download.
Good luck.

I need to do non-constrained crops for Ken Burns effect in photo slide show

I am making photo slide shows in imovie '09. I understand the Ken Burns effect and how to set a start and an end point. I want to use the effect on vertical or portrait mode photos. i would like to have the entire photo displayed in portrait mode and have it zoom in a bit. The problem is The start and end points seem to only be horizontal or landscape mode. I can't ever get the entire image selected. How can I do this?
Thanks,
Tim

You need to add the letterbox (black space) in another application. iMovie's Ken Burns effect will not do it for you. You can do it in Photoshop if you like.
However, there is a way to do it in Automator, and you can do hundreds of vertical photos very quickly. That is the way I do it.
Here is more detail:
There is also a quick way to pad your images without using Photoshop. This method will pad hundreds of images in just a few seconds.
You do it with a tool that comes with OS/X called Automator. It should be in your Applications/Utilities folder.
Automator is basically a workflow tool. It allows you to string together commands and actions into a workflow and then execute the entire sequence at once. If you have Snow Leopard, you can even add these workflows to your contextual menus that come up when you right-click.
There are many workflows that would work to pad your images. Here is an example:
In Automator, start a photo workflow and drag the following actions into the workflow from the Action palettes on the left.
You should have something like:
1)Ask for Photos (You must select one or more photos and hit Select - you can make this easier by putting them in an album beforehand)
2) Copy Finder Items (give it a folder to copy to- so you can find them easily)
3) Pad Images. (put a check mark in "scale image before padding" Pick the pixel dimensions of your project...like 640x480 or 960x540. or 1920x1080
Hit Run and a dialog box will come up asking you to select photos. When you are finished, press SELECT and the Automator script will keep running.
Then at the end you should have padded images in the folder you created in step 2.

Problems with Ken Burns effect

Having a very frustrating time trying to get a decent slideshow. Like the KB effect but when I play it back the images jerk and jump. Smoothness totally
gone. Strange thing is sometimes it is worse than others. Have tried closing all
other unnecessary programs to save RAM , etc...does not help. Sometimes it
looks ok played in iphoto but when I send to idvd the jerking is back. HELP.
When going through process have about 250MB free and 10 GB on disk.
Also when I export a slideshow (size-large 720X480)to Quicktime image
quality degrades considerably. All I want is a decent dvd copy of my honeymoon
pictures but can't seem to accomplish this. Am very disappointed at all the
grief involved in this...any help would be greatly appreciated.

Greetings Old Toad.
It seems that a fair number of users have run into this same problem over recent months: namely, producing a slideshow with audio from iPhoto with the Ken Burns effect creates a "jerky" movie as a result. The advice I have seen is to either clean up your hard drive or get more memory. I consistently run into this problem even though I have a 1Ghz G4 iMac with 768MB main memory. I have tried this on my root drive with about 7GB available and on a firewire drive I have with ~30GB available space. I have also tried using Cache Out X to clean up caches and other various files, and still iPhoto produces jerky results.
The one workaround that has worked was to turn off audio. That seems to fix the problem, but I do want audio in these slideshows to put onto DVD. Others have suggested using iMovie to add the audio track, but reading in the output of iPhoto into iMovie seriously degrades the quality of the video -- not to mention that it is a very slow and tedious process to do this.
I would like to point out that this was not always the case. Unfortunately I cannot pinpoint the exact time when this started happening, but I could swear that I had been able to create slideshows in this manner before one of the many iPhoto upgrades I automatically received over the last year. I now have version 5.0.4.
Have you heard of anyone successfully fixing or working around this problem? I love my Mac...and this is one of the fundamental reasons I switched from Windows a few years ago was for the great photo tools. But now, without the ability to make DVDs the way I want, I am considering switching back .
1 Ghz G4 iMac Mac OS X (10.4.3) 768 MB DDR

Jaggies in Ken Burns effect

My Photos with Ken Burns effect usually have jaggies to one degree or another. I had same problem with windows programs (Roxio EMC 8, Adobe Premier and Studio Media by Pinnacle). I just bought an iMac because all of those programs would crash too often, and their Pan and Zoom effects produced jaggies. Apple has such a good reputation for video that I assumed their programs would not have the same problems. The good news is that the iMac has not crashed at all. The bad news is that the pan and zoom produces jaggies in complex pictures (flower gardens) or in pictures with a lot of lines (sail boats). I have read the boards here (thanks Karl !!) and I have tried many of the remedies (render in iDvd not iMovie, import with effect on, etc.,) but the results are still very very disappointing. it is almost misleading to say that you can add motion to a picture when the quality suffers so much on so many pictures.
But this isnt a rant - just a question. What do I need to produce a quality pan and zoom effect on a photo if cost is not a big issue? Is there an upgrade for Idvd or iMovie? Would Final Cut Express or Pro produce a better product? Would more memory help (I have 512 mb)? What do the pros use? I am willing to throw dollars to solve this problem but I dont know where to throw them.

Hi Mardot - welcome to Apple, and to this forum!
It might be worth looking at either Still Life, or Photo to Movie before trying the expensive FC route. Both of these applications create very good pan and zoom effects that can be later integrated into an imovie project.
http://www.grantedsw.com/still-life/
http://www.lqgraphics.com/phototomovie.php
You probably should up-grade your imovie. imovie 6 is part of the iLife 6 suite of applications, which includes iDVD as well. Just be aware that iMovie 6, or indeed FC uses 'non-destructive' editing which needs much more storage space.
It would be a good idea also to list your computer model, RAM etc in your profile as this will then appear at the bottom of your posts. It can be helpful when diagnosing problems.

Slideshow -- Ken Burns effect

IPhoto slideshows not only has the ability to dissolve between photos, but includes the Ken Burns effect. While the ability to use transitions like dissolve in a slideshow is supported in Aperture, I have not found a way to float the photo to the left, right, down, up, etc. while being displayed. This effect really adds polish to a slide presentation, however, it is not supported in iDVD, DVD Studio Pro (at least version 2 which I have), and it appears it isn't supported in Aperture. Is it hidden somewhere in Aperture that I haven't found yet, and if not, why is iPhoto the only app that seems to have this feature? It seems weird that iPhoto would eclipse two professional-level apps (DVD Studio Pro and Aperture) with regards to a feature.
If anyone knows for sure, let me know!
Brad

Paul,
Thanks for you reply. The reason for my reply above is that the discussion pages ask to add some remark to mark the thread as answered, so I just added that "no known answer". This was discussed with others in another topic, and yes you are correct, the discussion was on the very pro vs. amateur point you brought up.
Brad

Jumpy ken burns effect

I have been very happy using the ken burns effect when exporting slide shows from iphoto to idvd. however, i am working on an iMovie project now (i have to use iMovie due to video clips) and I find the Ken Burns effect has a jumpy quality from one photo to the next. i never had this problem with iphoto slideshows, the transitions from one photo to the next were always smooth. it almost feels like the effect speeds up as it pans over the photo, then jumps to the next one and speeds up again. i am a novice at this and hope their is a simple solution. i have been working on this project for months now and would hate to start over. any suggestions?

it almost feels like the effect speeds up as it pans over the photo, then jumps to the next one and speeds up again. i
Yes, that's a known problem. Unfortunately, there is no ideal workaround.
It helps to use slow zooms/pans. It also helps to add a transition between the clips, which covers the first second or so and helps eliminate the sense of acceleration. Another solution is to set the clip duration a second or two longer than you really need, then trim off the end.
There are third-party products such as Still Life and Photo to Movie that let you create Ken Burns-style clips you import to iMovie. Some users prefer those to Ken Burns.
Please tell Apple you don't like this "feature". Maybe it will be fixed. Unfortunately, while the iPhoto programmers got Ken Burns right the first time, iMovie programmers keep dropping new bugs into the Ken Burns Effect with each new version of iMovie. It's really quite astonishing.
Karl

Blurry Ken Burns effect and transitions problem in IPhoto6

I've never seen an answer for these problems, so i'm hoping someone can help. Whenever I use the Ken Burns effect (both the auto and when i do it manually) the photos are very blurry. I have tried large hig resolution photo's as well as lower es. Same result. I thought it might be proessing power or a graphics card issue, but even if i export it to Quicktime or IDVD it's the same blurriness. Is there a setting I need to change? Is my current set up just not capable of utilizing this?
Second problem is transitions. If I do different transitions between slide they frequently will be wrong. Mostly they default to dissolve. If I begin with say Mosiaic, it will work fine until i switch to dissolve, and then it will stay on dissolve, no matter what I change it to. Any help?
Sorry for two seemingly different issues, but I'm trying to do both at once.

Excellent. The generator suggestions worked like a charm. Just curious. What did you mean by adjustment layer. Surely it's something simple, but forgive me for not knowing.
Trey

Ken Burns Effect in iDVD without iPhoto?

I was wondering if I can add the Ken Burns Effect in iDVD without having to make a slideshow in iPhoto and exporting.

This seems very inefficient to me. So in order to get motion slideshows, you have to export the slideshow from iPhoto as a .mov file (or iMovie which is even less easy), which takes quite a long time (at least 10min or so?) even on my MBP 2ghz and chewed up 500mb for 5 minutes. I have 17 slideshows I'd like to put in one iDVD project - processing them one by one in this way is a real pain in the neck.
Hopefully, one day Apple will either:
- allow you to queue slideshow exporting in iPhoto; or preferably
- accept motion slideshows is a core functionality for iDVD in the same way transitioning slideshows are. iDVD could just call on the iPhoto app behind the scenes to process the motion slideshows, if they really didn't want to move all that code into iDVD.

Ken Burns effect - in Magic iDVD

I dragged an Album Slide Show which had Ken Burns Effect but when I burnrf the DVD I did not get the Keb Burns effect. Any idea how to get this effect when I burn a Photo Slide Show onto DVD ?

I've been playing for the last 45 mins. with Magic iDVD and it doesn't appear that you can export to it. Most items are put together very randomly; not in terms of contents but rather in terms of effects as in droplet effect as well as other transitions between images. So I don't see how one would actually control the ken burns effect even if you wanted to for any given slideshow here. I guess that's the secret to a magic iDVD ....most everything is done well but very randomly.
For example:
(3) G4 PM's/(3) S-Drives/Sony TRV900/Nikons/6FWHD's/PS7/iLife06/FCPHD/DVDSP/etc. Mac OS X (10.4.8) My ichatav AIM account is: SDMacuser1 (Please use Text chat prior to video)

'Ken Burns Effect' in FCE?

I'm working with still images in FCE, and need not only to zoom in or out (Ken Burns Effect), but also need to pan around (up & down) (left & right) within the photo. I suspect that what I really need to do to achieve this, is to shoot the photo with a cam-corder, and achieve my goals while shooting. But... is there possibly a way in FCE to do this type of movement on a still image in the editing stage?
Thanks, Robert01742

Shane Ross tutorial is about FCP that provided advanced keyframing before FCE. Now if you have FCE 3.5, that tutorial fully applies to FCE as well; it doesn't to FCE 3.0.
FCE 3.5 was released in spring 2006, so the Apple Manual you are talking about must be about FCP, I guess...
About replies, they are clearly visible to everyboby, just their nesting depends on who you reply to.
My opinion (very personal) is that thanking is always nice... also because it tells future readers that the suggestions in the thread were OK. It's also nice to give points to whoever you feel was helpful, by selecting the Helpful or Solved bottons: not necessarily required.
Piero

Limited ken burns effect and exporting out the slide show

im trying to create podcasts of photos ( perhaps 50 )
with OPTIMAL ken burns effects panning and zooming
with my own musical scores using garageband. Using transitions and Voice overs and eventually uploading to a web account with iweb.
Is it better to create this all in imovie?
Iphoto is too limited with its very limited KenBurns effect.
I also dont see the individual time setting option for each image. where is that in iphoto. It seems that every photo has to be the same duration.
some have recommended iphoto then garageband
but i see too many limitations with iphoto.
anyone have similar experiences?

Yes you can do this with vertical photos.
Click on the little icon at the top left of the photo thumbnail in your project. This will bring up the photo editing panel.
If you want the vertical photo to show up full screen, click crop, and pick which portion of the vertical photo you want to show.
If you want to see the entire vertical photo, click "Fit" and the entire photo will be shown, but there will be black space on either side.
Now click on "Ken Burns" to add the motion effect.
When finished click "Done".

How do I remove Ken Burns effect from individual photos?

The instructions say to " In the Photo Settings window, deselect the Ken Burns effect checkbox and then click apply". My interface shows the word "update" instead of "apply" which has worked when I change other settings such as the length of time a photo is displayed. However every time I deselect KB...it comes back! I have also tried to constantly save the project, trying to save the deselect process.
Has anyone an idea? BTW the KB effect is very poor for most vertical pictures as it will cut off the top of the photo.
powerbook G4 Mac OS X (10.4.9) iMovie 6.0.3 version

• Yes, the Photo Settings window says Update instead
of Apply because you are updating an existing clip,
not importing a new one.
However every time I deselect KB...it comes back!
• Not sure exactly what you mean there. Do you mean
that in spite of unchecking the Ken Burns checkbox
the Updated clip doesn't change? It still has the Ken
Burns effect?
YES - see solution I found below.
If so, it sounds like iMovie may be failing to save
the updated clip to disk. That can occur if the
project resides on an external disk that uses the
wrong disk format. iMovie requires the Mac OS
Extended disk format. To check yours, see this:
http://discussions.apple.com/message.jspa?messageID=41
76921#4176921
I had our office software person check this out.
BTW the KB effect is very poor for most vertical
pictures as it will cut off the top of the photo.
• The Ken Burns effect can't read our minds. It only
does what we tell it to do. For photos that have a
portrait orientation it's normal to adjust the
zoom/pan so the rendered clip stays within the photo.
Note that it's possible to drag the photo in the
Preview window to adjust both the Start and End
points. So for a tall photo you may want to zoom/pan
up-or-down instead of side-to-side.
Note too that the settings in the Photo Settings
window always accept those settings of the last photo
we imported, updated or clip clicked on. So once
you've imported a tall photo with the Ken Burns
settings you like, you can easily apply those
settings for another photo. Just click on that
previously-rendered tall clip in the Timeline before
importing your next tall photo.
Karl
Karl,
Thank your for your input and in the last couple of days I have been able to produce the iMovie. But I now have another question about burning it.
Let me point out that I was able to deal with the Ken Burns issues by deleting the photos I wanted to change and replacing with new photos and using your tips + the help menu on "adding motion to your photos" to zooming right / left / vertically (which was very helpful).
Now that I have my project I cannot burn it as I get the following:there is not enough space to encode the aspects and in the pull down: "iDVD needs 2.350 GB of disk space to encode the remaining assets, but only 1.231 GB are available" I tried to cut down the files by deleting 5 chapters thus reducing the menu to one page showing chapters. I also re-saved the project with a new name.
BTW - I did burn it once but needed to fix it as the opening menu didn't have sound and I saw some other small photo details I wanted to fix. This version had 11 chapters on 2 menu pages with photos in the background. Essentially all I did was add a few more photos in motion and add the sound. That is why I thought maybe it was too much and removed the chapters saving one remaining page with music. I also do not have it on wide screen format as that uses more memory.
Can you help me with this? I don't understand why I'm getting the same message no matter what I do.
Many thanks,
Rozy

Ken Burns Effect Pollutes Everything

If you're putting together a slideshow, do not turn on the KB Effect for anything. Ever. I hate to say this, for I love this feature. It has enhanced many of my slides. However, it's a sorcerer's apprentice.
It causes nightmares once it's in your timeline. You can't update its durations, unless you delete the slide & start all over. I've found, oddly, that if a transition is connected, and you try to reduce the duration of the slide, after the transition is rendered, the slide, instead of having reduced duration, is actually increased by the amount of the reduction you wanted!
Beware of using KBE for any photo in your iPhoto imported album. Once you invoke KBE on any photo, it pollutes every photo you click on, thereafter, whether you turn it off or not. Karl Petersen posted a message last month, praising this polluting feature of KBE:
"The most important is that all of the Ken Burns settings, the KB checkbox, zoom, pan and duration are controlled by the LAST imported clip you made, or a previously-imported clip you clicked on. THAT's what sets the default setting for your next import(s). (A very nice feature, by the way, for it lets you apply the Ken Burns settings of one clip to the next photos you import. You don't have to reconfigure settings each time.)"
First, it's boring to an audience to have repetitious effects. Second, I don't know what he means by "import." iM4, in moving a photo from the Pane to the Viewer (timeline), says it's importing it, but I already imported it from iPhoto4. Third, I'm not so lazy as to resent having to reconfigure individual photos, if it means I have control over what I want to reconfigure & what I don't want to reconfigure.
Third, I wish Apple would realize users do have a brain: They don't need everything automated. There should be two buttons: KBE on for all, another KBE off for all. KBE off would allow the user to select which photos KBE is confined to. One thing I like about Microsoft is, it doesn't assume anything about the user. The user has choice & is always in control.
I'm really at the point of not invoking KBE for anything, anymore. It's causing too much frustration, & it's not worth the time trying to figure it out, especially once the photo is in the timeline.
BTW, what's the relationship between the Monitor, the Timeline, & the window in the upper right corner of the Photo Pane?

The conclusions you've reached about the Ken Burns Effect are so strange it makes me wonder if you've understood how it works. Unlike the Ken Burns Effect in iPhoto — which adds the effect on-the-fly as a sequence of photos is played — the Ken Burns Effect in iMovie affects how the photo is imported and rendered. iMovie renders video — creates a movie clip — based on your Ken Burns settings.
Remember, iMovie is all about creating video clips that play as part of a movie. iPhoto, on the other hand, has no movie. It simply displays a series of images. It never creates a movie until we export the slideshow to a QuickTime movie.
Changing the Ken Burns settings of a photo in iPhoto simply changes how that image is played in the iPhoto slideshow. Changing the Ken Burns settings of an iMovie clip, on the other hand, changes how it is (immediately) rendered into a new video clip.
You can't update its durations, unless you delete the slide & start all over
Of course you can change a duration. Click on the rendered clip in the Timeline, change the duration, and Update the clip.
Of course, if you've edited a previously-rendered clip — added a title or transition, for example — then it is no longer a KB clip. But if you remove the title or transition you can update the KB settings normally.
First, it's boring to an audience to have repetitious effects.
I never suggested you use the same KB effect on all your clips. I suggested that if you want to avoid having to reconfigure your Ken Burns settings before importing a photo, first click on a clip that already uses those KB settings. This saves time and considerable aggravation. I find this especially useful because the KB settings window is so clumsy (and buggy).
Second, I don't know what he means by "import." iM
Each time you add a photo from the iPhoto list to your iMovie project it is imported to the project. iMovie adds the photo to the project, then renders the video clip, if needed. (The imported photo is retained so you can Update the clip later, if you want.)
Third, I'm not so lazy as to resent having to reconfigure individual photos, if it means I have control over what I want to reconfigure & what I don't want to reconfigure.
Fine, iMovie lets you do that. There's nothing preventing you from configuring new Ken Burns settings for each photo. (My suggestion was to avoid having to do that unnecessarily.)
Third, I wish Apple would realize users do have a brain:
Apple DOES assume we have brains. And that we use them to learn how the program actually works, and why.
There should be two buttons: KBE on for all, another KBE off for all. KBE off would allow the user to select which photos KBE is confined to.
It's that point which makes me wonder if you've misunderstood something important. The Ken Burns settings we apply in iMovie do NOT control how the movie PLAYS in iMovie, at least not directly, like it does in iPhoto (and other slideshow software). The KB settings control how a clip is RENDERED when the photo is imported to iMovie. Once rendered, that clip is FIXED unless we re-render (Update) it. Changing its Ken Burns settings changes the clip ONLY if we re-render the clip.
Another way to think about it is that the Ken Burns Effect affects how a photo is imported. Once imported, it does not affect how it plays.
Once you invoke KBE on any photo, it pollutes every photo you click on, thereafter, whether you turn it off or not
There's no pollution of anything. For the reasons I mentioned earlier, the settings do NOT change anything about existing photos or clips until you Apply those settings, which (usually) causes iMovie to re-render the clip.
Try to re-think how Ken Burns works, where you assume iMovie is creating video, not just a series of images it plays in sequence. Those are two very different things.
Karl

Ken Burns effect very irregular

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