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View Full Version : Interlace on XH A1 may replace with HVX200, Help



Spotlight Media
09-28-2007, 07:18 PM
I will appreciate any guidance on this issue.
I currently own an XH A1 camera along with a FireStore FS-C direct to hard drive unit. While shooting in 1080i 60i I have noticed that during moving shots, whether I pan the camera myself, or the camera is following someone running, or a vehicle moving, anything moving relatively fast I seem to get what I think are interlace artifacts.

Perhaps I am using the wrong term, but it seems like the image is a little blurry until the camera or action comes to a stop and then you have a sharp image. So I assume it has to do with interlacing.

So my question is, if this is correct, does this have to do with the HDV codec, the camera itself, my shooting abilities? If it is the camera and/or the codec will buying the HVX200 and shooting with that clear up this, sometimes, mess?

I have no problem buying an HVX200 if that will help.

I have a link to some footage that shows the problem slightly happening and I can post a shot that is even worse. The current shot is at www.screwballfilms.com and then right click and download interlace movie, it is a quicktime straight out of the camera.

Thank you so much for what will most likely amount into a pretty novice question based on the knowledge I see on this site.

Cheers

Barry_Green
09-28-2007, 09:25 PM
Post the "worst" shot you've got so we can evaluate it.

If it's interlacing, and you shoot 60i on any camera including the HVX, you'll have the exact same issue.

If it's a codec issue, then switching to a non-HDV camera will resolve it.

But until you post the most extreme example, it's just guesswork on our part. (I tried downloading your existing clip but it just crashed my QT player)

William_Robinette
09-28-2007, 09:28 PM
Crashed me too.

Justyn
09-29-2007, 08:56 AM
vid only played for a few seconds. Try making a smaller more web ready version...

KROOKEDKROWN
09-29-2007, 09:12 AM
by any chance do you have the shutter speed lowerd to 12 or so

Spotlight Media
09-30-2007, 08:09 PM
Thanks for the responses, I did more research on it and I fell it might be a codec and interlace issue. I will get the sample on the site resolved ASAP.

Spotlight Media
10-01-2007, 03:26 PM
Here is a PICTURE of the interlace issue I am talking about. I have seen this before but it seems to be so much more prevalent on this camera. Is it the nature of HDV?

here is the picture link:
http://www.screwballfilms.com/images/interlace.jpg

Thanks for your help folks.

THoff
10-01-2007, 03:47 PM
That's not just interlacing, but probably a field order problem. With interlaced footage, if the two fields that make up each full frame of video are output in the wrong order, then this type of edge tearing / feathering will occur. DV is lower-field first, and HDV is upper-field first.

I don't want to talk you out of buying an HVX, but I think the problems you are having are due to workflow problems.

Noel Evans
10-01-2007, 04:03 PM
Green Tree thats definietely an issue in your workflow. As THoff said try changing your field order first see if that doesnt resolve it. If not tell us your 60i workflow.

TO answer your question though - this has nothing to do with HDV.

Spotlight Media
10-01-2007, 06:40 PM
Thank you both for replying. I hate to sound like such a newbie but I guess in many respects I am just that.

I currently shoot with the XH A1 to a Firestore FS-C hard Drive. This produces quicktime movies that are then copied from the drive onto my G5 and then imported into FCP with the 1080/60i easy setup. So I am not doing any capturing but rather just copying quicktime files into FCP. I own Final Cut Pro Studio 1, have not made the upgrade to 2 yet.

How would I get a field order problem, and what exactly is that?

Cheers.

Ming
10-02-2007, 09:01 AM
Also check your FCP playback settings, particularly the frame rate. If you have it on, say "half" your footage will look like this (if memory serves correctly, not in front of FCP at the moment, but I recall similar results)

andypaintguns
10-02-2007, 01:16 PM
hey man this might be a long shot but i work at a post house in nyc and some small project came by ways of me and he shot with an A1. the codec is the problem.... FCP6 does not support the canon hdv setup... fcp supports the sony codec. in your initial setup try to change your settings from the hdv 1080i60 to the apple intermediate codec and make a new sequence... see how that plays.... and yes its not an interlacing issue its a field order issue for sure and a workflow issue at that. its just i thought it might not be right on point for you because the dude im comparing to shot on tape and at 24f. im not sure what you shot at but see if this helps... reply back when u get a chance.