XL H1 pixelation and color bleed at DVinfo.net

Tim Neeves · April 15th, 2008, 07:08 AM

HELP!!

I've been experiencing a quirky problem on my camera. A portion of the footage I shoot, looks really pixelated - it is mostly noticeable on fast moving shots. You can see the color bleeding across the frame. If you imagine a red sleeve passing quickly across the frame, there seems to be a ghosting of this red sleeve. It looks horrible. I have been working in 50i.

I had it serviced by Canon in January, and they didn't find anything wrong with the camera.

Has anyone else found this?

Best wishes, Tim

Benjamin Hill · April 15th, 2008, 10:53 AM

You might just be encountering the artifacts of HDV compression- the fact that it is most noticeable on fast moving shots is a clue. Great camera, but in certain applications where the information changes a lot from one frame to the next, you will really see the limitations of what it can do.

Josh Chesarek · April 15th, 2008, 11:09 AM

Can you post a small sample video or some screen shots of the issue?

Kevin Harrington · April 16th, 2008, 10:32 AM

This may not be the same problem, but I've been noticing ghosting as well. I've uploaded a still. This was shot at 24fps, 1080p on the XLH1, shutter at 1/60.

Notice her eye repeated. This is not interlaced obviously, because of the settings above.

It seems to be ghosting and turning it green as well. Any ideas?

I've been shooting with this cam for awhile and it seems to have just turned up recently. Her head was in motion, dipping down, but in full motion its pretty apparent that there is some lag, almost dreamlike.

Pete Bauer · April 17th, 2008, 10:01 AM

Did you have NR2 on?

Dan Keaton · April 18th, 2008, 07:51 PM

Dear Tim,

Ensure that you have NR1 off, as this will definitely cause ghosting.

Dave Gosley · April 19th, 2008, 05:04 AM

Can anyone give a reason as to why it would have happened just to the region of the eyes, why not the whole screen?

Josh Chesarek · April 19th, 2008, 06:05 AM

Quote:

Originally Posted by Dave Gosley

Can anyone give a reason as to why it would have happened just to the region of the eyes, why not the whole screen?

It jumped on her whole face, it blured where there was motion, the rest of the frame's objects were static. There were still small movements in the other person and when you zoom in you can see a bit of double there too I think.

April 15th, 2008, 07:08 AM	#1
Tim Neeves Tourist Join Date: May 2007 Location: London Posts: 1	XL H1 pixelation and color bleed HELP!! I've been experiencing a quirky problem on my camera. A portion of the footage I shoot, looks really pixelated - it is mostly noticeable on fast moving shots. You can see the color bleeding across the frame. If you imagine a red sleeve passing quickly across the frame, there seems to be a ghosting of this red sleeve. It looks horrible. I have been working in 50i. I had it serviced by Canon in January, and they didn't find anything wrong with the camera. Has anyone else found this? Best wishes, Tim

April 15th, 2008, 10:53 AM	#2
Benjamin Hill Major Player Join Date: Nov 2005 Location: Iowa City, Iowa Posts: 670	You might just be encountering the artifacts of HDV compression- the fact that it is most noticeable on fast moving shots is a clue. Great camera, but in certain applications where the information changes a lot from one frame to the next, you will really see the limitations of what it can do. __________________ youtube.com/benhillmedia linkedin.com/in/benhillmedia

April 15th, 2008, 11:09 AM	#3
Josh Chesarek Major Player Join Date: Nov 2004 Location: Winter Park, FL Posts: 978	Can you post a small sample video or some screen shots of the issue? __________________ Simple Thought Productions - Life @ 30,000 Words per second

April 16th, 2008, 10:32 AM	#4
Kevin Harrington New Boot Join Date: Jul 2007 Location: Los Angeles, CA Posts: 12	This may not be the same problem, but I've been noticing ghosting as well. I've uploaded a still. This was shot at 24fps, 1080p on the XLH1, shutter at 1/60. Notice her eye repeated. This is not interlaced obviously, because of the settings above. It seems to be ghosting and turning it green as well. Any ideas? I've been shooting with this cam for awhile and it seems to have just turned up recently. Her head was in motion, dipping down, but in full motion its pretty apparent that there is some lag, almost dreamlike. Attached Thumbnails

April 17th, 2008, 10:01 AM	#5
Pete Bauer Wrangler Join Date: May 2003 Location: Eagle River, AK Posts: 4,100	Did you have NR2 on? __________________ Pete Bauer The most beautiful thing we can experience is the mysterious. It is the source of all true art and science. Albert Einstein Trying to solve a DV mystery? You may find the answer behind the SEARCH function ... or be able to join a discussion already in progress!

April 18th, 2008, 07:51 PM	#6
Dan Keaton Inner Circle Join Date: Dec 2002 Location: Augusta Georgia Posts: 5,421	Dear Tim, Ensure that you have NR1 off, as this will definitely cause ghosting. __________________ Dan Keaton Augusta Georgia

April 19th, 2008, 05:04 AM	#7
Dave Gosley Major Player Join Date: Oct 2007 Location: Hampshire Posts: 226	Can anyone give a reason as to why it would have happened just to the region of the eyes, why not the whole screen? __________________ http://www.videoproductionshampshire.co.uk

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