Strange one this ...
A problem developed today while using iMovie. Clean (as in not flickering) mp4 files inported into iMovie from a source I've used for weeks develops a contrast flickering once you try and use clips from the imported files. The more you play the clips within iMovie (before a share) the more it spreads.
I've uploaded a very short video showing the problem.
Short videohttp://youtu.be/fRLa-mBEucs
Thanks in advance
Paul
iMac, iOS 7.0.3
Thank you !!! - This worked for me with my GoPro Hero Session. Interestingly, previous clips I've edited from that camera that were shot in 25fps were fine with no flickering and it only seemed that it was clips shot in 50fps with the Low Light setting set to 'auto'. And as other people had noted the original clips when watched in the finder straight off the card did not flicker at all, only after they had been imported to iMovie. The other thing to note is the clips off the GoPro are .mp4 files and when they have been opened and exported via Quiktime they are then .mov files, so maybe thats something to do it? Regardless, this 'open in quicklime and then export' step did fix the problem although it is a pain to have to do this.
Thank you !!! - This worked for me with my GoPro Hero Session. Interestingly, previous clips I've edited from that camera that were shot in 25fps were fine with no flickering and it only seemed that it was clips shot in 50fps with the Low Light setting set to 'auto'. And as other people had noted the original clips when watched in the finder straight off the card did not flicker at all, only after they had been imported to iMovie. The other thing to note is the clips off the GoPro are .mp4 files and when they have been opened and exported via Quiktime they are then .mov files, so maybe thats something to do it? Regardless, this 'open in quicklime and then export' step did fix the problem although it is a pain to have to do this.
This seems to be a problem with having the auto brightness active on the go pro, really annoying. I had already edited all my clips together before I noticed. If you need to fix this you can re-encode the video using something like handbrake and just replace the original video file within the ~/movies/iMovie Library/project name/Original Media just make sure the file names are the same, this will remove whatever meta data is causing the problems.
The same problem here. I don't know how to fix this......
Regards,
Dennie
I haved called Apple support and they where not able to tell me what the problem is. After some tests with their content there were not issue's.
I founded that IMovie has some problems with my recorded 1080i signal. After converting it (with Handbrake) the problem was solved. Feature video's will be recorded directly in 1080P or 720P.
I hope this will help you as well.
Regards,
Dennie
Anyone found a fix for this? Driving me nuts.....
This was driving me nuts too, and I found the fix.
1. Open the original movies in Quicktime
2. Go to File > Export > 1080P (or whatever the highest resolution available is)
3. Save the movie files to a folder, and instead of importing your original files to iMovie, import the ones you exported in step 2.
Flicker should be gone!
THANK YOU liquidapples1!!! To everyone else, this actually works. You have to re-edit the video clips, but it prevents any future flickering. Just do it this way when importing any kind of video into iMovie.
I received this when trying. I tried with 4K, 1080, and 720.
Flickering video image in iMovie
