What's wrong with my A1 at DVinfo.net

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

Canon XH Series HDV Camcorders
Canon XH G1S / G1 (with SDI), Canon XH A1S / A1 (without SDI).


Reply
 
Thread Tools Search this Thread
Old July 16th, 2008, 11:24 PM   #1
Regular Crew
 
Join Date: Feb 2007
Location: Seattle
Posts: 199
What's wrong with my A1

I tried everything to figure this out but no luck. If you see the footage anything with horizontal line vibrate and flicker. It is worse when you see on tv. Here a sample http://www.vimeo.com/1353884. Thanks.
Kiflom Bahta is offline   Reply With Quote
Old July 16th, 2008, 11:48 PM   #2
Major Player
 
Join Date: Nov 2004
Location: Dallas
Posts: 747
Most likely from poor downconvert software, you don't see that if you watch it on a HDTV do you?
__________________
Khoi Pham
www.proeditproductions.com
Khoi Pham is offline   Reply With Quote
Old July 16th, 2008, 11:55 PM   #3
Regular Crew
 
Join Date: Feb 2007
Location: Seattle
Posts: 199
This is SD footage and it was captured with premier pro 2. I don't know what to do, it only happens with my A1.
Kiflom Bahta is offline   Reply With Quote
Old July 17th, 2008, 12:03 AM   #4
Major Player
 
Join Date: Dec 2006
Location: Los Angeles, CA
Posts: 959
I always thought the A1's SD was mediocre at best. I always notice too much aliasing on movement with anything detailed.
Bill Busby is offline   Reply With Quote
Old July 17th, 2008, 12:07 AM   #5
Wrangler
 
Join Date: Jul 2002
Location: Makati, Metro Manila
Posts: 2,706
Images: 32
Might also be the following:

1. Might be artifacts from compression (does the XH A1 downconvert from HDV to get it's SD to tape?). That wall has lots and lots of small tiny details, which is a great way to break many compression schemes, especially HDV.

2. Might be the shutter speed matching the frequency of the fluorescent lights. Change the shutter speed and you might be able to lessen the effect.

3. It might be moiré. This is a typical problem with video cameras, usually with clothing that has very detailed patterns. If it is moire, then there's nothing wrong with your camera, it's just the way it works. You just have to work around those types of patterns. I do see some moiré in the shots of the baskets, and it "seems" to match the movement of the walls, just not as severe. But I'm just guessing.

- Moiré entry on Wikipedia
- An example of Moiré
__________________
"Ultimately, the most extraordinary thing, in a frame, is a human being." - Martin Scorsese
Michael Wisniewski is offline   Reply With Quote
Old July 17th, 2008, 12:20 AM   #6
Major Player
 
Join Date: Dec 2006
Location: Los Angeles, CA
Posts: 959
Quote:
Originally Posted by Kiflom Bahta View Post
This is SD footage
I was under the impression this was shot on SD.....
Bill Busby is offline   Reply With Quote
Old July 17th, 2008, 12:26 AM   #7
Regular Crew
 
Join Date: Feb 2007
Location: Seattle
Posts: 199
It is was shot stright SD.!!!
Kiflom Bahta is offline   Reply With Quote
Old July 17th, 2008, 12:30 AM   #8
Inner Circle
 
Join Date: Feb 2007
Location: Fairfield, Dunedin, New Zealand
Posts: 3,634
Images: 18
Hi Kiflom...........

Can't really say why it's doing what it's doing, but have seen any number of posts and video where SD shot as SD on an A1/ G1 looks pretty ropey.

The best suggestion I can make is to shoot in HDV and downconvert in PP2.

Can't guarantee it will cure it but a good chance it will.


CS
Chris Soucy is offline   Reply With Quote
Old July 17th, 2008, 12:30 AM   #9
Wrangler
 
Join Date: Jul 2002
Location: Makati, Metro Manila
Posts: 2,706
Images: 32
Yeah, I'm wondering if the XH A1, creates it's SD from HDV and then writes that to tape. That may explain why there is a breakdown in movement in the SD image that's not normally there? Just speculating, since I don't really know. But those CCD chips should be giving a gee-whiz holy-cow SD image, but ...

Oh well, shoot it in HDV next time, then downconvert, you'll probably get a better image.
__________________
"Ultimately, the most extraordinary thing, in a frame, is a human being." - Martin Scorsese
Michael Wisniewski is offline   Reply With Quote
Old July 17th, 2008, 12:35 AM   #10
Inner Circle
 
Join Date: Feb 2007
Location: Fairfield, Dunedin, New Zealand
Posts: 3,634
Images: 18
Hey Michael...........

I think by CH's rules you owe me a beer, just stick it in the post will you!


CS

PS: Boy, that Michael doesn't hang about!

Last edited by Chris Soucy; July 17th, 2008 at 12:57 AM. Reason: +
Chris Soucy is offline   Reply With Quote
Old July 17th, 2008, 01:51 AM   #11
Major Player
 
Join Date: Mar 2007
Location: Winnipeg Canada
Posts: 532
what are Chris Hurd's rules?
i fear breaking them and owing virtual beer!
i bought some virtual beer from eBay, but by the time they arrived, they were warm. so i bought a virtual fridge. works great, and virtually CFC free.
Brian David Melnyk is offline   Reply With Quote
Old July 17th, 2008, 02:08 AM   #12
Inner Circle
 
Join Date: Feb 2007
Location: Fairfield, Dunedin, New Zealand
Posts: 3,634
Images: 18
Too scared to ask......

for the full list, as I might find myself owing an aweful lot of beer to an aweful lot of people.

Hmm, "virtually" getting pi##ed, must have it's merits.

Can't say it rings my chimes, but there you go.

(Humble and sincere appologes to Kiflom for beernapping his thread).


CS
Chris Soucy is offline   Reply With Quote
Old July 17th, 2008, 04:44 AM   #13
Regular Crew
 
Join Date: Feb 2007
Location: Seattle
Posts: 199
Micheal, if you think it is moiré. How come i don't see on my dvx?
Kiflom Bahta is offline   Reply With Quote
Old July 17th, 2008, 07:51 AM   #14
Regular Crew
 
Join Date: Feb 2007
Location: Seattle
Posts: 199
Hey guys, i am willing to put some $$$, for any one who can solve this problem. Thx
Kiflom Bahta is offline   Reply With Quote
Old July 17th, 2008, 07:52 AM   #15
Trustee
 
Join Date: Dec 2004
Location: Lipa City Batangas, Philippines
Posts: 1,110
I would say that the vimeo clip flickering lines are mainly due to scaling and compression artifacts. I downloaded the original AVI file and it is much cleaner.

The original appears to be progressive footage. Is it possible that somewhere during the editing process your NLE has deinterlaced it when it shouldn't have? This will degrade the footage in a similar way too.

Richard
Richard Hunter 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 > Canon EOS / MXF / AVCHD / HDV / DV Camera Systems > Canon HDV and DV Camera Systems > Canon XH Series HDV Camcorders

Thread Tools Search this Thread
Search this Thread:

Advanced Search

 



Google
 

All times are GMT -6. The time now is 05:22 AM.


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