Visual artifacts with IMovie11 after moving to Lion

Hi,

same issue for me. I worked with iMovie under Snow Leopard without any problems. After updating to Lion I have many artifacts in my video/project files. Same issue in iDVD and on TV. Same video files are working fine in Aperture. Therefore, I think it's more an iMovie issue.

Does someone has an idea?

Thanks!

can u tell the spec of mac?

Here are my specs:

Modellname: MacBook Pro

Modell-Identifizierung: MacBookPro6,2

Prozessortyp: Intel Core i5

Prozessorgeschwindigkeit: 2,53 GHz

Anzahl der Prozessoren: 1

Gesamtanzahl der Kerne: 2

L2-Cache (pro Kern): 256 KB

L3-Cache: 3 MB

Speicher: 8 GB

Geschwindigkeit für Prozessorverbindungstyp: 4.8 GT/s

Boot-ROM-Version: MBP61.0057.B0C

SMC-Version (System): 1.58f16

Intel HD:

Chipsatz-Modell: Intel HD Graphics

Typ: GPU

Bus: Integriert

VRAM (gesamt): 288 MB

Hersteller: Intel (0x8086)

Geräte-ID: 0x0046

Versions-ID: 0x0012

gMux-Version: 1.9.21

NVIDIA GeForce GT 330M:

Chipsatz-Modell: NVIDIA GeForce GT 330M

Typ: GPU

Bus: PCIe

PCIe-Lane-Breite: x16

VRAM (gesamt): 256 MB

Hersteller: NVIDIA (0x10de)

Geräte-ID: 0x0a29

Versions-ID: 0x00a2

ROM-Version: 3560

gMux-Version: 1.9.21

Monitore:

Color LCD:

Auflösung: 1680 x 1050

Pixeltiefe: 32-Bit Farbe (ARGB8888)

Hauptmonitor: Ja

Synchronisierung: Aus

Eingeschaltet: Ja

Integriert: Ja

SyncMaster:

Auflösung: 1920 x 1080 @ 50 Hz

Pixeltiefe: 32-Bit Farbe (ARGB8888)

Monitor-Seriennummer: H9MS804377

Synchronisierung: Aus

Eingeschaltet: Ja

Rotation: Unterstützt

Fernseher: Ja

Is there no solution available? It's really annoying!!!

It seems Apple is just ignoring this issue....

Still the same problem after update to 10.7.2

I'm really getting angry. 👿 I'd like to finish my video, but the iMovie is not usable any more!

Does someone has any solution?

Regards

I'm experiancing the exact same problem.

I've been looking beyond the support forums for answers and have found that others with similar issues are returning to Snow Leopard and the problem seems to go away.

I'll give it a go and let you know how it works outt.

By the way, if anyone were to hazard a guess, does the issue lie with Lion or iMovie 11?

Has anyone come accross this problem using Final Cut Pro X?

Hello,

now it's getting even worse. I get the artifacts not only in iMovie but also in Windows Vista running in a Virtual Box (Parallels Desktop).

It seems that everybody is just reporting his bug but there is no one solving the problems. And I though Apple might have a better support than Windows.
The guys in the apple store have no idea. They answered me: "Please wait for the next update". How long should I wait. I'd like to finish my video now and not next summer!

Sorry, but I'm a bit frustated about the bad Apple support.

Ok. Here's an update: Moving back to Snow Leopard eleimnated the problem, so it's definatley an issue with Lion and not iMovie.

Interestingly enough, the problem occured only on my MacBook Pro.

My 13" macbook did NOT have this problem.

Yep - Two machines running Lion and iMovie 11 - one with these glitchy artifacts, one running perfectly. WEIRD.

On a side note, downgrading from Lion to Snowleopard is a pain in the arse.

Luckely I was able to restore from a time machine backup.

Doctor Stu., Excellent Troubleshooting, and thanks for posting this back to the group. When you go to the Apple Menu > About this Mac > Click on More Info... What does your Graphics/Display record report itself as? Is it nVidia or AMD/ATI Radeon graphics? Or is it Intel 2000/3000 embedded graphics? Sounds to me it's a driver software glitch and Apple could resolve this if the created a newer release of the graphics chip support software.

Here's the specs for the MBP.

I'll have to wait till I get home to post details on the macbook.

Cheers everyone.

Chipset Model: Intel HD Graphics

Type: GPU

Bus: Built-In

VRAM (Total): 288 MB

Vendor: Intel (0x8086)

Device ID: 0x0046

Revision ID: 0x0012

gMux Version: 1.9.21

Displays:

Display Connector:

Status: No Display Connected

NVIDIA GeForce GT 330M:

Chipset Model: NVIDIA GeForce GT 330M

Type: GPU

Bus: PCIe

PCIe Lane Width: x16

VRAM (Total): 256 MB

Vendor: NVIDIA (0x10de)

Device ID: 0x0a29

Revision ID: 0x00a2

ROM Revision: 3560

gMux Version: 1.9.21

Displays:

Color LCD:

Resolution: 1440 x 900

Pixel Depth: 32-Bit Color (ARGB8888)

Main Display: Yes

Mirror: Off

Online: Yes

Built-In: Yes

Display Connector:

Status: No Display Connected

My specs you can find above in my old post.

It's a NVIDIA GeForce GT 330M.

Now that has me thinking about Graphics Display mode and the switching that might occur to save power. Does anyone know which chip is being used when they are rendering out the final version of their movie? Meaning, are you plugged into the Wall outlet? And under Energy Saver settings in System Preferences do you have this setting unchecked?

"automatic changing of video modes"

Also do you have an external monitor connected to the graphics port? Try disconnecting the external monitor, again to force the Mac to use just one of the graphics chips at a time.

It may be iMovie is using the Intel Chip or vice versa and maybe forcing it to use the other video chip is necessary? I don't know it's just a wild guess based on everyone having Intel embedded graphics AND the same exact nVidia GT 330M.

I like the way you think, but the problem doesnt just manifest during the final render. The same artiacts would appear RANDOMLY in iMovie whilst putting the movie together. That is, you could play your footage in iMovie and see an artifact but the replay the same footage and it wouldn't be there. So whatever is causing the glitch in the final render also impacts on watching and editing footage in iMovie.

Let's keep putting our heads together on this one.

-Doctor Stu.