Flashbulb artifact at DVinfo.net

Jim Babcock · August 27th, 2009, 06:51 PM

Using the Canon Vixia HFS100 (and the H100 before that) I noted an annoying artifact, at least in ProRes transcoded video. When a flashbulb goes off, it confuses the codec and you get a sharp, artifactly looking horizontal split screen with bright in one half and dark in the other. Usable but totally annoying. Would be a bigger deal if you were filming some event with a LOT of flashbulbs going off. Anybody else notice this?

Jim B

Dave Blackhurst · August 27th, 2009, 10:18 PM

CMOS, Rolling shutter, that horse has been thoroughly beaten...

To summarize... yes, it's annoying, for some it's a deal killer, 99% of the viewing public never notice it anyway... it's the way CMOS chip cameras "work".

Jim Babcock · August 28th, 2009, 02:48 AM

Thanks. I had noted the rolling shutter threads but never actually read them. As you said, most folks won't notice anyway. I suppose each new technology has its artifacts. People had never heard line static until they used Alexander Graham Bell's new fangled telephones but quickly accepted it as inevitable.

Jim B

August 27th, 2009, 06:51 PM	#1
Jim Babcock Regular Crew Join Date: Jul 2006 Location: Houston,Texas Posts: 38	Flashbulb artifact Using the Canon Vixia HFS100 (and the H100 before that) I noted an annoying artifact, at least in ProRes transcoded video. When a flashbulb goes off, it confuses the codec and you get a sharp, artifactly looking horizontal split screen with bright in one half and dark in the other. Usable but totally annoying. Would be a bigger deal if you were filming some event with a LOT of flashbulbs going off. Anybody else notice this? Jim B

August 27th, 2009, 10:18 PM	#2
Dave Blackhurst Inner Circle Join Date: Feb 2007 Location: Apple Valley CA Posts: 4,874	CMOS, Rolling shutter, that horse has been thoroughly beaten... To summarize... yes, it's annoying, for some it's a deal killer, 99% of the viewing public never notice it anyway... it's the way CMOS chip cameras "work".

August 28th, 2009, 02:48 AM	#3
Jim Babcock Regular Crew Join Date: Jul 2006 Location: Houston,Texas Posts: 38	Thanks. I had noted the rolling shutter threads but never actually read them. As you said, most folks won't notice anyway. I suppose each new technology has its artifacts. People had never heard line static until they used Alexander Graham Bell's new fangled telephones but quickly accepted it as inevitable. Jim B