My iMovie is skipping like crazy when I try to edit and then goes to a black screen and you can only hear the audio!?!? What's happening??

I use iMovie almost everyday for Youtube videos. I have nothing in my imovie except the 5 clips that I'm editing now. I have all my media on an external hard drive and delete everything after I'm done with ( I empty all trash cans). My iMovie is now skipping when I try to edit and then the clips just go to a black screen and I can only hear the audio, this has been going on for a week and I don't know what to do?!? Any help?

Try Resetting your Mac's PRAM and NVRAM
If that doesn't help, try Resetting the System Management Controller
-- Those links are currently down for maintenance but should available shortly.

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When I try to make a new video, a window comes up that says,"The operation could not be completed," and then under it, it says,"No other information is available about the problem," what is happening and how do I fix it?

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Hi
And without info - it's near to impossibly to help. Try my general troubleshooting note:
Troubleshooting note
When iMovie doesn't work as intended this can be due to a lot of reasons
iMovie Pref files got corrupted - trash it/they and iMovie makes new and error free one's
problem in iMovie Cache folder - trash Cache.mov and Cache.plist
Creating a new User-Account and log into this
This forces iMovie to create all pref. and cache files new and error free
Event or Project got corrupted - try to make a copy and repair
a Codec is used that doesn't work (even though iMovie and/or iDVD tries to / they fail in the end)
version miss match of QuickTime Player / iMovie / iDVD
preferences are wrong - Repair Preferences
other hard disk problem - Repair Hard Disk (Disk Util tool - but start Mac from ext HD or DVD)
External hard disks - MUST BE - Mac OS Extended (hfs) formatted to work with Video
( UNIX/DOS/FAT32/Mac OS Exchange - works for most other things - but not for Video )
USB-flash-memories - usually do not work
Net-work connected hard disks - usually do not work (most often not fast enough and WRONGLY FORMATTES as DOS etc)
iPhoto Library got problems - let iPhoto select another one or repair it. Re-build this first then try to re-start iMovie. When iMovie starts-up it first look trough this iPhoto library and if faulty it all Halt’s.
This You do by
First - close iPhoto
Secondly - on start up of iPhoto - Keep {cmd and alt-keys down}
Thirdly - now select all five options presented
THEN - WAIT a long long time (>20 hours are not strange)
free space on Start-Up (Mac OS) hard disk to low (<1Gb) - I never go under 25Gb free space for SD-Video (4-5 times more for HD)
external devices interferes - turn off Mac - disconnect all of them and - Start up again and re-try
GarageBand fix - start GB - play a few notes - Close it again and now try iMovie
Screen must be set to million-colors
Third-party plug-ins doesn't work OK
Run "Cache Out X", clear out all caches and restarts the Mac
Let Your Mac be turned on during one night. At about midnight there is a set of maintenance programs that runs and tidying up. This might help
Turn off Your Mac - and disconnect Mains - for about 20-30 minutes - at least this resets the FireWire port.
In QuickTime - DivX, 3ivx codec, Flip4Mac, Perian etc - might be problematic - temporarily move them out and re-try
(I deleted the file "3ivxVideoCodec.component" located in Mac HD/Library/Quicktime and this resolved my issue.)
buenrodri wrote
I solved the problem by removing the file: 3ivxVideoCodec.component. after that, up-dated iMovie runs ok.
Last resort: Trash all of iMovie and re-install it
Yours Bengt W

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Hello KnightyLAD,
The following articles can help sort most playback issues in iTunes for Windows.
Troubleshooting iTunes for Windows Vista or Windows 7 video playback performance issues
http://support.apple.com/kb/TS1718
iTunes for Windows XP: Troubleshooting video playback
http://support.apple.com/kb/TS1386
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My iMovie is skipping like crazy when I try to edit and then goes to a black screen and you can only hear the audio!?!? What's happening??

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