Please help me deinterlace my 1080i video! at DVinfo.net

Go Back   DV Info Net > The Tools of DV and HD Production > Open DV Discussion

Open DV Discussion
For topics which don't fit into any of the other categories.


Reply
 
Thread Tools Search this Thread
Old April 26th, 2013, 10:05 AM   #1
Regular Crew
 
Join Date: Apr 2013
Location: Washington, DC
Posts: 76
Please help me deinterlace my 1080i video!

Gear rundown:
- Canon XHA1 (DIGIC DV II HD image processor, three 1/3-inch 16:9 CCDs with 1.67 megapixels (1440 x 1080)

Please help me with deinterlacing my video! When I shoot nature vids as experiments, I get the twigs with those crap-looking jagged edges, not to mention shooting quick motion. My Canon 7D doesn't even get this, but of course it's 1080p and not 1080i. I was told these nasty artifacts could be fixed, but how?

I've watched some tutorials on Vimeo and YouTube and tried fixing it in FCP X settings, After Effects, and MPEG Streamclip. Obviously I don't know what I'm doing with deinterlacing.

THANK YOU for your assistance, y'all, and keep making good art!
Casey Danielson is offline   Reply With Quote
Old April 26th, 2013, 01:10 PM   #2
Major Player
 
Join Date: Feb 2009
Location: Philadelphia, pa
Posts: 705
Re: Please help me deinterlace my 1080i video!

I also have the xha1 and have not experienced this. What NLE are you using? When you export your video use the progressive setting. Did you shoot in 60I, 24p or 30Pp
Kevin Lewis is offline   Reply With Quote
Old April 27th, 2013, 09:30 AM   #3
Regular Crew
 
Join Date: Apr 2013
Location: Washington, DC
Posts: 76
Re: Please help me deinterlace my 1080i video!

I shot it at 24fps at 1080i. When I import into Final Cut Pro X I just do Import, set camera to VCR playback mode, wait till the footage is rolling on my monitors through FCP X and then hit Import. It imports as the tape plays, creating video files within that project.

This was helpful
but, even though I set the info deinterlace to use Upper Field first, that box automatically unchecks each time I try to play it.

What video file format do you render your final sequence to?
Casey Danielson is offline   Reply With Quote
Old April 27th, 2013, 06:41 PM   #4
Major Player
 
Join Date: Mar 2012
Location: Hamilton, New Zealand
Posts: 745
Re: Please help me deinterlace my 1080i video!

Personally, I export 1080i from my NLE, then use Handbrake to "decomb" the file.

What this does, instead of deinterlacing every line, it only deinterlaces portions where the interlacing is actually visible. This saves from losing lots of vertical resolution, and saves on encoding time.
Jody Arnott is offline   Reply With Quote
Old April 29th, 2013, 10:45 PM   #5
Inner Circle
 
Join Date: Aug 2005
Location: Atlanta/USA
Posts: 2,507
Re: Please help me deinterlace my 1080i video!

Quote:
Originally Posted by Casey Danielson View Post
I shot it at 24fps at 1080i.
Something doesn't add up here... 24fps is always frames, not fields (never interlaced) - so are you sure you are seeing interlacing artifacts or something else?
__________________
Ervin Farkas, CDVS
Certified Legal Videographer
Ervin Farkas is offline   Reply With Quote
Old April 29th, 2013, 11:24 PM   #6
Major Player
 
Join Date: Feb 2009
Location: Philadelphia, pa
Posts: 705
Re: Please help me deinterlace my 1080i video!

Make sure that your project settings match your source footage. Also, when you export, make sure your using a progressive mode and not an interlace mode.
Kevin Lewis is offline   Reply With Quote
Old April 30th, 2013, 08:07 PM   #7
Regular Crew
 
Join Date: Apr 2013
Location: Washington, DC
Posts: 76
Re: Please help me deinterlace my 1080i video!

I'd like to show you what I mean. Here is a photo of the issue, way enlarged and accentuated. It is subtle when viewed on laptop, but still visible. On my 52" monitor it is obvious, but probably won't scrap everything from that shoot. Am I missing something? I just played the tapes in VCR mode through the FireWire 400 (same as exporting?) and hit import in FCP X. Here's the photo: http://i1055.photobucket.com/albums/...ps0a9ef2bb.jpg

THANKS FOR THE HELP, FOLKS!
Casey Danielson is offline   Reply With Quote
Old April 30th, 2013, 08:30 PM   #8
Inner Circle
 
Join Date: Aug 2005
Location: Atlanta/USA
Posts: 2,507
Re: Please help me deinterlace my 1080i video!

Those are not deinterlacing artifacts.
__________________
Ervin Farkas, CDVS
Certified Legal Videographer
Ervin Farkas is offline   Reply With Quote
Old May 1st, 2013, 12:47 PM   #9
Inner Circle
 
Join Date: Sep 2003
Location: Portland, Oregon
Posts: 3,259
Re: Please help me deinterlace my 1080i video!

I agree with Ervin, these are not deinterlacing artifacts.

On the right, there is a dark outline around a diagonal white line, the outline shows jaggies.

This is characteristic of in-camera detailing or sharpening, or post sharpening. Dial down your in-camera Detail or Sharpness controls, or turn off post Sharpen/Detail filters. That there is so much jagginess would, I think, be an artifact of scaling down the image. If you have a 1-pixel line around an object and you scale down it's usually going to get blobby.

The leaf on the left shows this too, and also some mosquito noise (looks like a cloud of mosquitoes around the leaf). This noise is a compression artifact, couldn't say at what stage in your workflow it's occurring, but the solution is to increase the bitrate. If it's happening in-camera this might not be possible.

In-camera detailing was created in the bad old analog days to increase the perception of sharpness, and specifically to help tv viewers follow the action in sports. A golf ball with a dark outline is much easier to visually track, a hockey puck with a white outline, etc. It is a very TV sort of look, and those concerned with a more Filmic look will dial it way down.
__________________
30 years of pro media production. Vegas user since 1.0. Webcaster since 1997. Freelancer since 2000. College instructor since 2001.
Seth Bloombaum is offline   Reply With Quote
Old May 3rd, 2013, 02:43 PM   #10
Regular Crew
 
Join Date: Apr 2013
Location: Washington, DC
Posts: 76
Re: Please help me deinterlace my 1080i video!

Awesome, thanks guys. I got this XHA1 for a good deal, and I've seen some good work done on these cameras. I've even considered getting one of the Letus Extreme EF adapters so I can use my photo lenses, but not if these artifacts are going to show up often.

I'll check out the detail settings and give it a look tonight. Thanks again for helping a newb.
Casey Danielson is offline   Reply With Quote
Old May 9th, 2013, 01:07 PM   #11
Regular Crew
 
Join Date: Apr 2013
Location: Washington, DC
Posts: 76
Re: Please help me deinterlace my 1080i video!

Quote:
Originally Posted by Seth Bloombaum View Post
...these are not deinterlacing artifacts.

...This is characteristic of in-camera detailing or sharpening, or post sharpening. Dial down your in-camera Detail or Sharpness controls.
I blew up this frame and gave it the old unsharp mask to exaggerate the artifacts, so the problem is nowhere near this bad. But I can still see it on any size screen. Are these jaggies just something I have to deal with due to optical limitations of the XHA1? It's happening as part of the digitization process, so that's not encouraging? What say ye, experts?
Casey Danielson is offline   Reply
Reply

DV Info Net refers all where-to-buy and where-to-rent questions exclusively to these trusted full line dealers and rental houses...

Professional Video
(800) 833-4801
Portland, OR

B&H Photo Video
(866) 521-7381
New York, NY

Z.G.C.
(973) 335-4460
Mountain Lakes, NJ

Abel Cine Tech
(888) 700-4416
N.Y. NY & L.A. CA

Precision Camera
(800) 677-1023
Austin, TX

DV Info Net also encourages you to support local businesses and buy from an authorized dealer in your neighborhood.
  You are here: DV Info Net > The Tools of DV and HD Production > Open DV Discussion

Thread Tools Search this Thread
Search this Thread:

Advanced Search

 



Google
 

All times are GMT -6. The time now is 10:38 PM.


DV Info Net -- Real Names, Real People, Real Info!
1998-2017 The Digital Video Information Network