Sony AVCHD clips "judder" after editing with iMovie9

The video plays back smoothly on a TV screen in 720p when played directly from the Sony HDR-TG7VE camcorder, but after editing in iMovie the panned shots judder. The movie looks so bad it is hardly possible to watch it. The picture also becomes much "softer". My workflow is: importing as Large 960x540 file, exporting to AppleTV via iTunes as Large file with the same settings. I am recording the movies on HD HQ setting, which I guess means 720p as well. I would appreciate any help how to fix it.

I feel your pain. I own a the previous model, a TG3 and was pretty dismayed by the amount of "judder" i saw after it had been through iMovie. As you state, when viewed natively off camera, image is smooth as silk. If you google AVCHD and Judder you will see a lot of comments on this (half of them mine!).
As a general comment, a lot of people have said with some AVCHD cameras and panning, the golden rule is DON'T. If you have to, do it at extremely slow speeds.
I wasn't really happy with this, as i'm convinced it's happening somewhere in the import/export of iMovie.
Look at my example i posted up a few months ago, is that what you are seeing?:
http://gallery.me.com/cosconstantinou#100376
This weekend, someone off a different forum presented me with a glimmer of hope. He also owns a TG3 and has been using Elgatos Turbo Hd usb convertor thingymebob. Look at this link, scroll down to the comments (at 9:46pm) and download his clips from yousendit:
http://techmoan.wordpress.com/2009/03/26/elgato-turbo264-hd-hands-on-user-test-a nd-review/
Check out the 720p 60fps at 10,000kps clip, it's STUNNING. I was so relieved to see the difference.
Trouble is, I don't know how to recreate this in iMovie. It's (the above clips) been encoded by the Elgato stick and not been through iMovie. If I view them on my Mac and open movie inspector it says it's "H.264/AVC" by format.
If i try and recreate these settings as an export in iMovie ("export to Quicktime) I don't get the same smooth pan-could be something to do with the "AVC" element mentioned in format.
I also noticed my picture getting far softer after being imported into iMovie. I guess as the AVCHD is being converted into AIC, that was always going to happen. It's basically 2nd generation from the off (AVCHD is too compressed for iMovie to edit it natively). If you are ever thinking of editing a larger size file, 1080i, then consider this guide and follow it to the T:
http://blog.davidglover.org/2009/03/creating-hd-video-with-imovie-09.html
except at step 4c (tick "both fields") and at 5a change the resolution to “1920 x 1080 HD” and increase the bitrate to 16200=makes it 1080p instead of 1080i and actually looks the same on your tv as straight off the camera (almost). I am using a PS3 to watch my movies back, which is more capable than Apple TV i believe.
I'm sorry I cant be of more help. I have been hunting high and low for an answer to the judder issue and still haven't found anything concrete. Some blame the AVCHD format, some say its our CMOS rolling shutter, none can tell me why it doesn't happen straight off the camera, but does via iMovie (or other video editing programs apparently).
If you are recording in 720p, then you video is progressive, so it cant be an interlacing issue.
Best of luck with your search, keep me posted/update this thread if you find any answers and if you do nothing else, download the clips from the Techmoan link above and check out the one i mentioned. It's taken me 3 months of searching to find anything close to that as a possible solution.
Cos.
Message was edited by: cos constantinou

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