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June 1st, 2015, 05:26 PM
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#1 |
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Tourist
Join Date: May 2015
Location: Carnegie
Posts: 1
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GH4 problem with motion blur and stuttering vision
Hi folks,
I need some advice. I recently shot a courtroom on my GH4. I needed a long roll (90 minutes plus) so I used the Panasonic 64gb card and set the camera to: FHD 50 MBS 1920 x 1080 - 25p Shutter speed 1/50 This is the problem. At the start, using mostly available light, everything looks fine. When people move in the frame it looks normal. But then we turned on 2 x 1k lights and things got weird. The vision becomes quite stuttering and people blur when they walk through frame. Heres the vision : I'm a bit baffled. My initial thought is that 50 mbps may have been too low a rate to allow the camera to write all the info, but I have no scientific basis for believing that. Otherwise, I'm at a loss to know what I did wrong to get that result. Any advice is much appreciated! Craig |
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June 1st, 2015, 07:35 PM
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#2 |
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Regular Crew
Join Date: Mar 2011
Location: Salt Lake City, Utah
Posts: 65
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Re: GH4 problem with motion blur and stuttering vision
Are the two different clips in the same file? I almost looks like it's shooting 15 frames per second at a really slow shutter in the second part. I've never seen anything like that with LED panels and my GH4 at 1080-60p or 4K UHD 30p.
Cheers, Pete |
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June 1st, 2015, 08:37 PM
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#3 |
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Inner Circle
Join Date: Jan 2013
Location: Austin, Texas
Posts: 2,006
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Re: GH4 problem with motion blur and stuttering vision
It looks like you accidentally adjusted the shutter when trying to adjust the iris to compensate for the new lighting.
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June 2nd, 2015, 12:59 AM
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#4 |
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Inner Circle
Join Date: Jun 2007
Location: Belgium
Posts: 9,509
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Re: GH4 problem with motion blur and stuttering vision
If you look in the motion picture menu, what setting is the exposure mode set to?
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