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October 10th, 2006, 05:08 PM
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#1 |
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Regular Crew
Join Date: May 2004
Location: Guatemala, Guatemala
Posts: 63
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flicker DEFECT
I am having some distracting flicker in my shots with the HD100U specially when panning on leaves or subjects with thin lines. Have somebody experimented this? What could be the reazon? Could it be fixed?
Thanks for your advise.
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Saultv |
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October 10th, 2006, 05:32 PM
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#2 |
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Trustee
Join Date: Sep 2005
Location: Gilbert, AZ
Posts: 1,896
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hmm.
never heard of this. give us a link to a small file showing us what you're seeing. |
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October 10th, 2006, 07:02 PM
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#3 |
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Regular Crew
Join Date: May 2004
Location: Guatemala, Guatemala
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I attached two Qt, one is the original shot where the the kind of flicker effect
is light and the other shows how it is evident when a slowmotion effect is applyed. (Avid XpressPro). Thanks.
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Saultv |
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October 10th, 2006, 09:05 PM
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#4 |
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Major Player
Join Date: Apr 2005
Posts: 512
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Is this standard def? You are probably seeing interlacing artifacts.
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October 10th, 2006, 09:29 PM
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#5 |
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Regular Crew
Join Date: May 2004
Location: Guatemala, Guatemala
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yes, I am rec in SD. What do you mean with interlacing artifacts?
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Saultv |
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October 10th, 2006, 10:08 PM
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#6 |
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Major Player
Join Date: Apr 2005
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I'm not sure what you mean here, if you're asking what interlacing is, this is a basic video term that all videographers should be familiar with. It refers to scanning the even and odd lines of the image alternately instead of sequentially. Interlacing artifacts are any visual errors introduced by interlacing. Interlacing makes very thin lines flicker because they are only being refreshed half as often as the picture as a whole appears to be. This is an effect common to all cameras which capture interlaced video, not just the HD100.
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October 10th, 2006, 11:59 PM
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#7 |
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Regular Crew
Join Date: May 2004
Location: Guatemala, Guatemala
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Stephan, is there a way that I could correct this on my JVC?
Thanks for your advise.
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Saultv |
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October 11th, 2006, 12:10 AM
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#8 | |
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Quote:
The interlacing artifacts are inherent in the format. Since alternating lines of video are captured at different times, thin moving lines (in the picture) will be broken up because the entire line is not captured at the same time. There will be misalignment as the line moves between the captures of the alternating video lines. Shooting in progressive mode will not show these artifacts, since the entire frame will be captured at once. The camera shoots HDV progressive frames -- that is, the entire picture is captured at once, not half the picture, then the other half the picture (in alternating lines down the frame). The camera also shoots SD 16:9 progressive frames. As I am trying, try 50p (PAL) or 60p (NTSC) and you shouldn't see this. You will still get the SD picture (16:9) but without interlacing. I do not mean to give a full explanation or solution, but perhaps a different way to look at it. |
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October 11th, 2006, 09:15 AM
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#9 |
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Regular Crew
Join Date: May 2004
Location: Guatemala, Guatemala
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Thanks, Jack and to all. I learned a lot.
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