CODEC comparison at DVinfo.net

Go Back   DV Info Net > Canon EOS / MXF / AVCHD / HDV / DV Camera Systems > Canon EOS Full Frame for HD

Canon EOS Full Frame for HD
All about using the Canon 1D X, 6D, 5D Mk. IV / Mk. III / Mk. II D-SLR for 4K and HD video recording.


Reply
 
Thread Tools Search this Thread
Old July 25th, 2009, 09:29 AM   #1
Major Player
 
Join Date: Feb 2005
Location: Rio de Janeiro - Brasil
Posts: 304
CODEC comparison

Hi

Is there any reliable comparison about efficiency and, mainly, motion artifacts produced by the H.264 used by 5D MKll and the (MPEG2) HDV from JVC PRO HD (GY-HD 100)?

Thanks
Ron
Ron German is offline   Reply With Quote
Old July 25th, 2009, 11:26 AM   #2
Major Player
 
Join Date: Jan 2007
Location: Portland, OR
Posts: 949
Quote:
Originally Posted by Ron German View Post
Hi

Is there any reliable comparison about efficiency and, mainly, motion artifacts produced by the H.264 used by 5D MKll and the (MPEG2) HDV from JVC PRO HD (GY-HD 100)?

Thanks
Ron
The worst artifacts on the 5D2 are caused by aliasing, which in turn is caused by reading only one out of every three lines on the sensor. Unfortunately, aliasing artifacts are very, very hard on codecs and result in a world of compression artifacts (on top of the aliasing artifacts).

The only way to address aliasing artifacts is to soften the image optically so that there is absolutely no sharp detail anywhere in the image. That will prevent aliasing, which will prevent worsened compression artifacts. People are doing this already on accident by shooting thin DOF and missing focus.

Since the JVC cameras don't have aliasing artifacts, the comparison depends entirely on how much aliasing is in the image.

If there is deep DOF with a sharp lens, the 5D2 compression artifacts will be off the charts.

But if the image is soft and has no sharp details, the compression is actually very good IMHO and easily beats HDV.
Daniel Browning is offline   Reply With Quote
Old July 25th, 2009, 12:56 PM   #3
Major Player
 
Join Date: Feb 2005
Location: Rio de Janeiro - Brasil
Posts: 304
Thank you Daniel

Is there any eletronic sharpness control in 5DMkll to reduce alieasing?
Best regards
Ron
Ron German is offline   Reply With Quote
Old July 25th, 2009, 01:06 PM   #4
Major Player
 
Join Date: Feb 2006
Location: Philadelphia
Posts: 795
Yes - you can turn down sharpening in the picture profile which goes a long way towards minimizing aliasing artifacts, although it doesn't eliminate them entirely.
__________________
My latest short documentary: "Four Pauls: Bring the Hat Back!"
Evan Donn is offline   Reply With Quote
Old July 25th, 2009, 04:25 PM   #5
Major Player
 
Join Date: Feb 2005
Location: Rio de Janeiro - Brasil
Posts: 304
Thank you Evan. I`ll see your film.
Ron
Ron German is offline   Reply With Quote
Old July 25th, 2009, 04:57 PM   #6
Major Player
 
Join Date: Feb 2005
Location: Rio de Janeiro - Brasil
Posts: 304
Evan, where are the artifacts (aliasing and others) in your film?
Did you turn down sharpening in the picture profile? Image is excelent.
How did you edit it?
If this camera had 24p... It shoud be a very good tool for the independent film community.
Maybe the best low cost solution.
By the way: your short is very well made and inteligent.
Ron ver
Ron German is offline   Reply With Quote
Old July 25th, 2009, 06:49 PM   #7
Major Player
 
Join Date: Feb 2006
Location: Philadelphia
Posts: 795
Thanks. We didn't end up with much aliasing in that film. if I remember correctly the only place I saw any was in the wide group shots - super wide angle lens (14mm) with plenty of DOF increases the chance of fine detail in the shot. Sharpness was turned all the way down for everything. Personally I haven't encountered any aliasing yet that was so objectionable that I wouldn't use the shot - but I think a lot has to do with the material you're shooting, I may just have been lucky so far. Remember too though that once it's down-scaled to 720p for something like Vimeo most aliasing disappears.

Probably the only visible artifacts we had in that film are in the low light shots where the woman is putting on the hat in the mirror. The close up was shot at 3200 ISO and you can see artifacts in the darker areas of the shot, but that's simply a result of the high ISO noise.
__________________
My latest short documentary: "Four Pauls: Bring the Hat Back!"
Evan Donn 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 EOS Full Frame for HD

Thread Tools Search this Thread
Search this Thread:

Advanced Search

 



Google
 

All times are GMT -6. The time now is 02:46 AM.


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