Horizontal skew in footage at DVinfo.net

Go Back   DV Info Net > Canon EOS / MXF / AVCHD / HDV / DV Camera Systems > Canon XA and VIXIA Series AVCHD Camcorders > Canon VIXIA Series AVCHD and HDV Camcorders

Canon VIXIA Series AVCHD and HDV Camcorders
For VIXIA / LEGRIA Series (HF G, HF S, HF and HV) consumer camcorders.

Thread Tools Search this Thread
Old July 4th, 2007, 10:37 PM   #1
Regular Crew
Join Date: Jan 2004
Location: ACT Australia
Posts: 148
Horizontal skew in footage

Couple of occasions I've noticed a horizontal skew in progressive footage. It's difficult to assess because the few times it happens is with shakey camera movement. Specifically see the change from time-code 1s 17/25f --> 18/25f.

I think it's happened twice to me, both times shooting 1080p25 (PAL) OIS on.

EDIT: I see this artefact is referred to as 'rolling shutter', shall read more, but would like confirmation my clip is exhibiting the same thing.

file is QT MPEG-4 6.1MB


IIRC someone raised this issue before, but I couldn't find the thread.
Mark Joseph is offline   Reply With Quote
Old July 4th, 2007, 11:45 PM   #2
Regular Crew
Join Date: Mar 2007
Location: Switzerland
Posts: 53
Definetely a rolling shutter issue. It has neither been caused by the OIS nor by progressive (25P) recording (even though different shutter speeds seem to improve/worsen those errors). It's simply caused by the CMOS and its rolling shutter - and there's nothing you can do about it but keeping the cam as steady as possible and pan either very slowly or very agressivly, so the distortion becomes unnoticeable.

The hardware solution for this problem is a so called global shutter. Very expensive industry cams with CMOS sensors already have this, so it's going to be a matter of time until it will be incorporated even in lower end consumer cams in the future.

As you already said: try to read more on this subject to find out when the 'wobbling' exactly occurs and what you can do to avoid it best. Just as a 'warning', so you wont be surprised: there are some people who find all CMOS cameras to date unusable and a thing to avoid at any costs. Even if they may be right to some point, they're expecting their camera to fit their very specific needs (especially motion tracking for additional 3D effects). For them, it may be useless - for you it may be just a 'glitch' you can live with.

By the way: Sony cams with CMOS chips suffer from the 'effect' more or less equally, so it's not a Canon specific problem.
Enea Lanzarone is offline   Reply

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

(800) 223-2500
New York, NY

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

Texas Media Systems
(512) 440-1400
Austin, TX

Precision Camera
(800) 677-1023
Austin, TX

(800) 323-2325
Mineola, NY

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 > Canon EOS / MXF / AVCHD / HDV / DV Camera Systems > Canon XA and VIXIA Series AVCHD Camcorders > Canon VIXIA Series AVCHD and HDV Camcorders

Thread Tools Search this Thread
Search this Thread:

Advanced Search



All times are GMT -6. The time now is 03:23 PM.

DV Info Net -- Real Names, Real People, Real Info!
1998-2018 The Digital Video Information Network