AVCHD renders with ghosting

Pcamp wrote on 3/20/2011, 7:12 PM
I have been trying to make mp4's from GH1 footage. It looks fine until there is significant movement in the frame and then the movement shows ghosting. For example a moving bike tire shows two offset images of the tire when you pause the playback. I have tried Sony AVC and Mainconcept AVC ( both progressive) and get the same result. If I put the same footage in FCP I get a clean MPG4 mov. Anyone know what is going wrong?
Thanks!
Paul

Comments

musicvid10 wrote on 3/20/2011, 8:31 PM
What frame rate is your camera footage?

What frame rate is your render?

Hint: If you're shooting 24p, render 24p.
John_Cline wrote on 3/20/2011, 9:30 PM
Change the default deinterlace method in the project's properties to "interpolate"
musicvid10 wrote on 3/20/2011, 9:52 PM
OK, I think it's resample, John thinks it's deinterlace (we've got 25 cents riding on this).
willqen wrote on 3/21/2011, 12:40 AM
Please, oh please let us know who wins the bet !! OK ? }:?)=

Will

PS: I really appreciate you guys. You educate me endlessly.
NickHope wrote on 3/21/2011, 1:04 AM
25 cents says it's real ghosts
Pcamp wrote on 3/21/2011, 9:05 AM
It looks like perhaps it is Musicvid who wins the 25cents. I had assumed my source footage was 720-30p but the GH1 records 60i (in AVCHD mode) This was my first time using this camera. If I render to 60 fps the ghosting is gone. However now I have to figure out how to make a 30fps file out of this footage.
Thanks for your help!
Paul
NickHope wrote on 3/21/2011, 11:20 AM
A DSLR shoots interlaced? That's horrifying.

Anyway you need to deinterlace it. Start by matching the media settings with the little button at the top right of the project properties window. Then choose the interpolate deinterlace method that John mentioned. Make sure full resolution rendering quality is set to Best. Then render out at 30fps progressive.

Fancier deinterlace methods have been discussed on the forum recently.
PeterDuke wrote on 3/21/2011, 4:39 PM
"A DSLR shoots interlaced? That's horrifying"

According to dpreview, it shoots 1920x1080 in 24p and encapsulates it in 60i.

http://www.dpreview.com/reviews/panasonicdmcgh1/page19.asp
Pcamp wrote on 3/22/2011, 8:45 AM
Another current topic contained an answer that helped also:
"720p 59.94 footage double-images in 29.97 project"
When I "disable re-sample" I can get a non-ghosting render.
Paul