What caused this blockiness - dirty heads? 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 August 17th, 2009, 03:51 AM   #1
Regular Crew
 
Join Date: Feb 2002
Location: Dublin, Ireland
Posts: 47
What caused this blockiness - dirty heads?

http://idisk.mac.com/denis.murphy-Public/viking.jpg

Not a FCP question, but I could do with some opinions. I lent my Canon XH A1 to a friend last week and he shot two hours of video at an event. He's not a pro shooter, and didn't really test the camera beforehand, although he did spend a few hours familiarising himself with the controls. None of the video is usable (see link). I assume this was caused by dirty heads. AFAIK he never got the "dirty heads" warning that the XH A1 is supposed to flash up in the viewfinder (not that you'd depend on that).

I've cleaned the heads since, and can't reproduce the problem. He was shooting DV-Pal anamorphic. The tape brand is Sony DVM60 ME, bought new from a reliable dealer. I've shot test footage at the end of one of his tapes, and there were no problems.

The weird thing is, if I play back the tape on a Sony handycam, the blockiness is not as pronounced, although still unusable. But on the Canon, the footage seems to deteriorate with each play,

My friend captured all his footage to FCP from the Canon and the blockiness on his capture is not as pronounced (similar to when I play back in the handycam).

I know this footage probably can't be saved but can anyone have a look at the link and confirm that this is in fact just a dirty head problem? I don't want this to happen to me on a shoot!

I've had the camera for a couple of years (very lightly used) and never had a problem with dirty heads.
Denis Murphy is offline   Reply With Quote
Old August 17th, 2009, 04:24 AM   #2
Regular Crew
 
Join Date: Apr 2009
Location: Weehawken NJ
Posts: 51
were you previously using the sony tape? i have read that switching from sony to non-sony tape or vice versa will cause head problems and should be avoided.
Cynthia Granville is offline   Reply With Quote
Old August 17th, 2009, 06:23 AM   #3
Trustee
 
Join Date: Dec 2004
Location: Lipa City Batangas, Philippines
Posts: 1,110
Hi Denis. Looks like a dirty head to me. What brand of tape do you normally use? As Cynthia says, switching brands can cause head clogging problems.

Richard
Richard Hunter is offline   Reply With Quote
Old August 17th, 2009, 08:25 AM   #4
Inner Circle
 
Join Date: Mar 2003
Location: Billericay, England UK
Posts: 4,711
Yes, dirty heads. You've done all the right tests though, even recording onto the Sony tapes to ensure they're not the culprit. What a bummer - probably a tiny particle of emulsion from one of the first tapes used caused the blockage, and there it stayed, destroying all subsequent shots.

When using a new tape (always a 'dangerous' thing to do because tape is so cheap and so complex a device) it's always worth shooting something and doing a cue / review for a check before going further. Better (in my view) to use recycled tape on an important shoot - that way you know the tape's good and it's been burnished smooth by your heads. But I always receive stick for suggesting this.

tom.
Tom Hardwick is offline   Reply With Quote
Old August 17th, 2009, 03:52 PM   #5
Major Player
 
Join Date: Feb 2007
Location: Prague Czech Republic
Posts: 263
Denis, because it is from the one side only, it can be a defect of mechanism. I realy recommend take cam to the Canon service.
Pavel Sedlak is offline   Reply With Quote
Old August 17th, 2009, 07:27 PM   #6
Trustee
 
Join Date: Dec 2004
Location: Lipa City Batangas, Philippines
Posts: 1,110
Quote:
Originally Posted by Pavel Sedlak View Post
Denis, because it is from the one side only, it can be a defect of mechanism. I realy recommend take cam to the Canon service.
Hi Pavel. You may be right, but since the problem disappeared after head cleaning, I would say a dirty head is more likely as the cause.

Richard
Richard Hunter is offline   Reply With Quote
Old August 18th, 2009, 04:02 PM   #7
Major Player
 
Join Date: Feb 2007
Location: Prague Czech Republic
Posts: 263
Quote:
Originally Posted by Richard Hunter View Post
Hi Pavel. You may be right, but since the problem disappeared after head cleaning, I would say a dirty head is more likely as the cause.

Richard
Yes, I understand. But it is my experience, that this sort of fault can rise in future.
Pavel Sedlak is offline   Reply With Quote
Old September 2nd, 2009, 06:13 PM   #8
New Boot
 
Join Date: Jun 2009
Location: Portland
Posts: 13
Quote:
Originally Posted by Cynthia Granville View Post
i have read that switching from sony to non-sony tape or vice versa will cause head problems and should be avoided.
I have heard this as well, and because of it, I avoid using sony tapes altogether. Does anyone know what are the best tapes to use with XH-A1?
Eric Vecchi is offline   Reply With Quote
Old September 2nd, 2009, 09:43 PM   #9
Regular Crew
 
Join Date: Apr 2009
Location: Bloomington, MN
Posts: 167
I switch between Sony, JVC and Canon tapes alot. Just what ever special I can find that week. I have seen no issues with it ever. Plus, (Don't hate me for this....) I have yet to clea the head on mine and its been about 8 months. (I plan to this Saturday)

If the problem is gone after cleaning, It was definitely a dirty head.
__________________
Canon XH-A1, Rode NTG-2
DIGITAL NOIR PRODUCTIONS
Scott Nelson 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 01:42 AM.


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