what is causing choppiness of video in compact cameras?

Started Sep 22, 2013 | Questions
PeetieT
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what is causing choppiness of video in compact cameras?
Sep 22, 2013

I have seen many compact cameras and cell phones creating a video, that is jumping up and down. Like the plane taking off video in Nikon AW110 review. What is causing it? Is is the lack of encoding resources?

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thebustos
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Re: what is causing choppiness of video in compact cameras?
In reply to PeetieT, Sep 22, 2013

Without seeing am example, my best guess is the video is interlaced rather than progressive, lower bit rate, or both maybe...
--
Good luck and happy shooting!

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PeetieT
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Re: what is causing choppiness of video in compact cameras?
In reply to thebustos, Sep 22, 2013

thebustos wrote:

Without seeing am example, my best guess is the video is interlaced rather than progressive, lower bit rate, or both maybe...
--
Good luck and happy shooting!

Checkout Sample Video 1 on the below link. It is progressive video, 16 Mbps is not too low and anyway if the bitrate would be low, than the picture quality should suffer, not the smoothness of the recording.

http://www.dpreview.com/reviews/nikon-coolpix-aw110/3

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brianj
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Re: what is causing choppiness of video in compact cameras?
In reply to PeetieT, Sep 22, 2013

PeetieT wrote:

thebustos wrote:

Without seeing am example, my best guess is the video is interlaced rather than progressive, lower bit rate, or both maybe...
--
Good luck and happy shooting!

Checkout Sample Video 1 on the below link. It is progressive video, 16 Mbps is not too low and anyway if the bitrate would be low, than the picture quality should suffer, not the smoothness of the recording.

http://www.dpreview.com/reviews/nikon-coolpix-aw110/3

The one of the seaplane looks completely steady and normal on my PC.

Brian

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Draek
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Re: what is causing choppiness of video in compact cameras?
In reply to PeetieT, Sep 23, 2013

Fast shutter speed, most likely -- most people who aren't videographers don't bother screwing ND filters in front of the lens to follow the 180 degree rule in daylight, and even in cameras with 60fps recording (most do only 30), with a 1/500 shutter speed there's a lot of information that's not making it to the camera sensor.

Personally it doesn't bother me much, but some people are particularly sensitive for it and that's why the 180 degree shutter rule was first devised -- use half the reciprocal of the framerate (ie, 1/60 for 30fps) as your shutter speed, adjust brightness with ISO, aperture and ND filters as necessary.

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PeetieT
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Re: what is causing choppiness of video in compact cameras?
In reply to brianj, Sep 23, 2013

brianj wrote:

PeetieT wrote:

thebustos wrote:

Without seeing am example, my best guess is the video is interlaced rather than progressive, lower bit rate, or both maybe...
--
Good luck and happy shooting!

Checkout Sample Video 1 on the below link. It is progressive video, 16 Mbps is not too low and anyway if the bitrate would be low, than the picture quality should suffer, not the smoothness of the recording.

http://www.dpreview.com/reviews/nikon-coolpix-aw110/3

The one of the seaplane looks completely steady and normal on my PC.

Brian

Even the author mentioned it.

I think it is something like this:

http://en.wikipedia.org/wiki/Rolling_shutter

Cheers,

Peter

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