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-   -   Moire with GH2 after converted (https://www.dvinfo.net/forum/panasonic-lumix-s-g-gf-gh-gx-series/491856-moire-gh2-after-converted.html)

Jeff Harper February 22nd, 2011 01:10 PM

No good in Vegas
 
2 Attachment(s)
Thanks for the suggestion Jim, but still no joy. As I expected, the files are squished in Vegas. The default properties for all new projects as I have it set is as you suggested, so I don't need to change project settings....I always edit in 16:9 with 1.2121, since up to now I've always shot in SD widescreen.

Darn it. I had NeoScene installed (the trial) and uninstalled it, maybe something is screwed up.

Jeff Harper February 22nd, 2011 01:25 PM

I've checked and unchecked a few things, no change...I'll check in at the cineform forum to see if this is me or the software later....I've tried it with about 6 combinations of settings changes just for kicks, not working out so far.

Jim Snow February 22nd, 2011 01:31 PM

Re: Moire with GH2 after converted
 
You only did part of what I suggested. ALSO go the "Project Media" and select properties on each file and set the aspect ration to 1.2121. These intermediate file don't contain the PAR (pixel aspect ration). They are intermediate editing files, not viewing files.

Jeff Harper February 22nd, 2011 01:58 PM

Re: Moire with GH2 after converted
 
Well, Jim, you've been most patient, and it is fine now, thank you. I might have seen project and properties in the same sentence and figured I already knew what you meant; I didn't of course.

Jeff Harper February 22nd, 2011 02:02 PM

Re: Moire with GH2 after converted
 
Wow, looks pretty darn good! Jim who's the man? You are!

Jim Snow February 22nd, 2011 02:08 PM

Re: Moire with GH2 after converted
 
I'm glad you got it worked out. I'm happy that I could help. I have received help many times on this forum. It's the least I could do to return the favor. ;-)

Jeff Harper February 22nd, 2011 04:52 PM

Re: Moire with GH2 after converted
 
Jim, I've tried changing the properties of the clips all at once, but it doesn't take. Please don't tell me this has to be done one clip at a time....

George Kilroy February 27th, 2011 04:05 AM

Re: Moire with GH2 after converted
 
I've read through this and I don't think it answers my problem.
I have just shot my first footage with a GH2 but when I put the clips into my CS5 timeline there is pronounced moire patterning.
Here is a clip that illustrates what I mean, it can be seen in the railings.


It was shot at 1080i 50fps at high quality. It shows when played in the Premiere monitor when native AVCHD and also when de-interlaced. It is also there when I put it on DVD either interlaced or de-interlaced.

What I really want to know is if this is a characteristic of this camera. I have shot this same format: AVCDH 1080i 50fps on a sony CX550 and have never seen such patterning.

I hope someone is able to answer this otherwise the camera is going back. I've spent sometime researching this camera and I've never heard it mentioned; until I saw this thread.

Jeff Harper February 27th, 2011 04:20 AM

Original problem wasn't moire
 
George, I am the original poster of this thread. It has been told to me, and confirmed, that the problems with my video were in the conversion.

If you read the beginning I didn't have problems with the original footage. My problems occurred after processing. The problem was the result of my not knowing how to convert and resize HD footage to SD.

My problem has been resolved.

If your "moire" is present in original footage, you would have to adjust your shooting, settings, or try a different camera. I wish I could suggest what you could do to eliminate your problem, but I don't know.

Off the top of my head, moire when shooting something like the fence you were shooting wouldn't be surprising. Try your Sony on that exact same scene, if you haven't already, from the same distance.

I have limited experience with the GH2, and have shot nothing like you did, but I love the camera.

Consider looking at the lens you're using as well. The 14-42 is a relatively poor performer, as all the kit lenses are. I have the 14-140, and it would certainly win no contests.

George Kilroy February 27th, 2011 04:40 AM

Re: Moire with GH2 after converted
 
Thanks Jeff. I have read through the thread but noticed that most of the solutions were to addressed to the problem occurring during down-sizing whereas you notice that I see this in the original clip, even when deinterlaced.
I was using the 14-140 kit lens. I'm now in a dilemma, I can return it tomorrow for a refund but I do like the camera.
My main shooter is a JVC-HM700 which shoots 50fps 1080i and I support that with a tiny Sony CX550 shooting AVCHD 1080i 50fps. They work together well so I guess that the GH2 just isn't going to fit in with my style then. Most of my output is still to DVD so it will only exacerbate the problem. I don't want to shoot SD as I am archiving on Blu-ray.

I'll just mention that I'm not just being picky about this. The same problem was obvious in shots with trees and other fine detail as soon as there was any movement in the frame , I used that clip as it showed it best (or worst).

Brian Luce February 28th, 2011 03:59 PM

Re: Moire with GH2 after converted
 
George, what can I say, fences are a big problem. You might have better luck with 24p High quality. But fences are always tough, especially chain link.

Jeff Harper March 1st, 2011 09:13 AM

Re: Moire with GH2 after converted
 
I agree, Brian. Using a pan of a fence as an example of poor performance by this camera is nonsensical UNLESS compared to another camera in the exact same situation for comparison purposes.

George Kilroy March 1st, 2011 10:00 AM

Re: Moire with GH2 after converted
 
I posted to ask those here with experience of this camera if the patterning was something I should expect from this camera as I'd never heard mention of it during my research. The answer seemed to be yes in certain circumstances but not as bad as some other stills cameras that shoot video. That's interesting to know but wasn't really what I was after, I'm not doing a comparison or evaluation to decide which to buy. I had done that and had decided that this was the only stills camera that would suit my work practice. I tried it and didn't like the result, I might be quite alone in this but there you are.

I wasn't out to prove a point or criticise the camera, or say that there is a better one.

Jim Snow March 1st, 2011 10:22 AM

Re: Moire with GH2 after converted
 
If you will go shoot that fence with the GH2 set to EX TELE mode, you won't see any moire. It may not be as much fun as recreational equivocation on a forum but it will be an effective demonstration of the benefit of doing so. The GH2 is the only DSLR camera (with or without a mirror) that has a mode to eliminate moire in problematic shots - and you want to send it back for moire! That doesn't make any sense.

Brian Luce March 1st, 2011 10:38 AM

Re: Moire with GH2 after converted
 
A good question might be, NOT which DSLR (with or without mirror), but which video camera can handle a chain link fence without some sort of artifacting. How high up the food chain does one have to go?

Chris Hurd March 1st, 2011 10:45 AM

Re: Moire with GH2 after converted
 
Quote:

Originally Posted by Jim Snow (Post 1623240)
The GH2 is the only DSLR camera (with or without a mirror) ...

Once again: if it doesn't have a mirror then it's not a DSLR, by definition.

Sorry to keep harping on this, but the distinction is important.

The GH2 is *not* a DSLR.

If you want to assign a type to it then it should be called EVIL (Electronic Viewfinder Interchangeable Lens).
Or if you don't like how that sounds, call it ILEV (Interchangeable Lens Electronic Viewfinder).
But not a DSLR, which it cannot be, since it doesn't have a mirror. Hope this helps,

Jeff Harper March 1st, 2011 10:45 AM

Re: Moire with GH2 after converted
 
Well George, you aren't the only one sending your camra back. Many are finding out this is not the camera for them.

I have friend who was totally sold until he used them for wedding work last week. They are too much work for many folks. The lenses required, the need for complete manual operations, the menus, are too much.

When you put the effort into it, the results are stunning. Proof is everywhere. For ease of operation, compared to other similar, it is a walk in the park. For a traditional videographer, particularly those not experienced in manually operating a camera, it is a nightmare.

I know, because I am a "traditional" videographer, with a smidgen of photography experience. Saturday was the toughest shoot of my life, and the results were extremely disappointing. The reason? I have not yet mastered the camera I own.

Jim Snow March 1st, 2011 10:47 AM

Re: Moire with GH2 after converted
 
Quote:

Originally Posted by Brian Luce (Post 1623249)
A good question might be, which video camera can handle a chain link fence without some sort of artifacting. How high up the food chain does one have to go?

It would be a camera that has a 1 to 1 sensor array versus image size. Resizing in the camera causes moire. It's an unavoidable aspect of resizing. The benefit of the EX TELE mode in the GH2 is that it does a 1 to 1 sensor map. That's why it is able to shoots these difficult shots without moire. As they say in the commercial, "Try it, you will like it."

Chris Hurd March 1st, 2011 10:47 AM

Re: Moire with GH2 after converted
 
Sounds like it's better suited for controlled narratives rather than unrepeatable events.

Jeff Harper March 1st, 2011 10:52 AM

Re: Moire with GH2 after converted
 
It is an interesting feature, Jim. As Chris pointed out not useful for run and gun, but for run and gun moire is not an issue 99.999% of the time. Moire is not usually a problem when shooting speakers, wedding ceremonies, and the like.

Jim Snow March 1st, 2011 10:56 AM

Re: Moire with GH2 after converted
 
Chris, Jeff - That's an excellent way to describe it.

Martyn Hull March 1st, 2011 11:08 AM

Re: Moire with GH2 after converted
 
George i have done several tests and find 720P resolution /sharpness to be the same as interlaced and i am not talking about after the 50i has been deinterlaced which loses resolution.

Guy McLoughlin March 1st, 2011 12:10 PM

Re: Moire with GH2 after converted
 
Quote:

Originally Posted by George Kilroy (Post 1622528)
when I put the clips into my CS5 timeline there is pronounced moire patterning.Here is a clip that illustrates what I mean, it can be seen in the railings.

George,

Can you post a full resolution screen capture from your shoot, either in TIFF or PNG format.

I am guessing that your Vimeo video clip is scaled down from the original size. Sometimes aliasing/moire problems can be introduced by the scaling process, so I am curious to see what a full resolution uncompressed image from your video looks like.

Brian Luce March 1st, 2011 09:03 PM

Re: Moire with GH2 after converted
 
George,
I don't know about CS5, but judging image quality on a timeline monitor wouldn't give an accurate representation of actual image quality with a lot of NLE's. Render it out and see if the problem is still there.

Jim Snow March 2nd, 2011 05:36 PM

Re: Moire with GH2 after converted
 
That is especially true when evaluating moire since resizing is done very much so on the time line and resizing is THE cause of moire.

Jeff Harper March 2nd, 2011 09:25 PM

Re: Moire with GH2 after converted
 
I don't know you guys, I suspect his moire was real, the fence was just a terrible subject for panning across. I thought he said it was in the original footage, but I might be mistaken.

Jeff Harper March 8th, 2011 11:11 PM

Re: Moire with GH2 after converted
 
I almost hate to start back in on this thread, but here's a thread (below) with a pro discussing his using the GH2 instead of his Red camera (imagine that) and he mentions the lack of moire on mesh, etc.

Further, he talks of using the HDMI connector for monitor useage, which I think is absolutely vital with this camera. The LCD is great, but for exteneded shooting time, I just can't see going without a monitor.

http://www.dvxuser.com/V6/showthread...he-application)

Jim Snow March 8th, 2011 11:48 PM

Re: Moire with GH2 after converted
 
Quote:

Originally Posted by Jeff Harper
he talks of using the HDMI connector for monitor useage, which I think is absolutely vital with this casmera. The LCD is great, but for exteneded shooting time, I just can't see going without a monitor.

A hearty Amen to that! I have seen so much blown focus footage on this class of camera. It's a shame to have a camera that is capable of tack-sharp focus and shoot crippled because of inadequate viewfinder tools.


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