deinterlaced output is not deinterlaced

I assume you means 1920x1080p30. If so -- your video has NO interlace. Each entire frame is captured at once. So, no matter HOW it is exported -- there can't be interlace artifacts.

Unless, output is being pulled from different frames. But, why? How?

What version of QT are you guys using?

The version that comes with the 10.5.6 iLifeiWork is 7.5.5. I certainly wouldn't upgrade to 7.6!

+"The version that comes with the 10.5.6 iLifeiWork is 7.5.5. I certainly wouldn't upgrade to 7.6!"+

Is there an issue with 7.6 ? I have it on my main iMac, no issues so far.

....ALL the lines in a frame are simply scaled to the size you want. Because ALL the lines are used -- there inherently will be combing on motion!" WHEN THE SOURCE IS INTERLACED.

I'm well aware 540 is 1/2 of 1080 and for this reason 540p exports are slightly special.

But to put it simply, take a sample clip of 1080i and export it at 720p in im08, and im09, the im08 export will give me a 9/10 for quality, the im09 export gets a 1/10, the results are chalk and cheese, your explanations whilst understood are not the reason for this difference.

im09 appears to have affected QT in some way, if I take the same clip as above and used QT to export it to 720p instead of im with QT conversion, then prior to im09 my export was the same 9/10 as above, but after installing im09, the export from QT is now also 1/10 (This isn't the same for Final cut)

I also used to export my 1080i (1440) source video edited in im08 to AIC 1080i (1440), I figure some day I may want to use it if the tv ever supports better than 540p (720p). My exports were exactly the same as my source AIC after import (as they should be). If I now do the same in im09, they still come out interlaced but now they also have combing, go figure !!!

I started using iMovie 09 last night and noticed this exact same problem. Most of the video I had import using iMovie 08 but I did test an iMovie 09 import and I still had the jagged lines on the video. Most of my video was from an HV20 but I recently replaced it with an HG20 (my HV20 got stolen and I decided to ditch tapes). Video from both cameras had the jagged lines when exported at any setting in iMovie 09. When I played the videos back via quicktime they still had the jagged lines. I'm thinking (and hoping) that this may be a quicktime issue. I know that the video was fine when it was originally imported it and when I played them back in quicktime there were no jagged lines. I might try to reinstall iLife 09. I hoping that this gets fixed.

Here's what I see

http://web.mac.com/gartside1104/z002/8v9.html

Exactly what I found as well. Using the same settings I have used in FCE with my Canon HF10, 1280x720 all came out jaggy out of iMovie09. But if I used the Export for web and pick the largest, 960x540, it comes out clean as a whistle.

So, Apple has an issue that they didn't fix before shipping. My hunch is they wanted to get it out a few days earlier than maybe they should have?

Patch please...

which does not mean that this should not be fixed.

Exactly what I am seeing as well. I have a canon HF100 that used to work perfectly with iMovie 08.

I second that, I'm glad to see I'm not alone. I was about to pull my hair out last night. I am going to try viewing the imported video on a different mac with an older version of quicktime. I'll report my findings when I get home from work.

I have a Canon HF100 recording 1080p video at 1980x1080. I have created projects inside iMovie 08 and exported them into Youtube HD at 1280x720 and they look amazing. I never had to worry about deinterlacing the video.

I just updated to iMovie 09 and was working on a clip to test the image stabilization feature. Now, whatever export option I choose for 1280 x 720 HD video has TERRIBLY interlaced my video with lines and it looks ridiculous. I cannot get a good source video to upload to Youtube. This has to be an iMovie 09 bug. Hopefully a quick fix!

Guys,
Has anyone found a workaround? All my exports at 1280 x 720 are now ruined since "upgrading". Okay, I'v got some nice new features but my HD export is a mass of interlaced lines 😟

Can I get 08 back somehow as the installer kindly killed it....

Regards,
Steve

Dear Apple,

Please help us.

Thanks!

Your HD Editing Customer Base 😉

The video previews great inside iMovie 09 even when playing at fullscreen so I know the source looks good. It's just the export problem.

How can we officially report this to Apple? If we al do that hopefully it will show up on their radar.

After some experimenting, the best workaround to this is to convert your 1080i material to 960x540P on import. Then all of your 720p exports will look fine.

Honestly, I compared the output of 1080i form iMovie 08 to 960p from iMovie 09 (both going out to 720p) and saw very little difference in quality.

You can still keep your 1080i material intact upon import, iMovie will just make new 960x540 version of them. It's what I do almost always regardless of this bug cause the disk savings are huge and the quality difference is negligible.

If you do this workflow do you still choose De-interlace in the QTP output settings? Just wondering.