"Funny jerking movements"

Robert Hicks · April 27th, 2007, 04:38 PM

Quote:

Originally Posted by Austin Meyers

http://www.dvinfo.net/conf/showthrea...ghlight=issues

http://file.meyersproduction.com/hv2...ues%20720p.mov

a previous discussion on this subject...

i have since built this...

http://file.meyersproduction.com/hv20/steadyrig3.jpg

which yields this...

http://file.meyersproduction.com/hv20/steadycam-web.mov

also of note this was shot in 24p, and the 60i is even smoother.

That is an amazing improvement. Is it just metal on metal or do you have any rubber in there?

Andrew Boss · April 27th, 2007, 07:09 PM

Quote:

Originally Posted by Ron Lemming

Dave: My stabilizer is constructed just like yours, only mine is made of wood and it's a bit longer so my hands are a bit further away from the camera. Hands further away from the camera = more steady. As I said earlier this construction did not help my HV20 but it does wonders with my old Sony.
So I really hope my HV20 is just defective. I can't wait to take a properly working HV20 for a walk with this simple stabilizer.

Ron and John

Have you tried this exercise with a fixed shutter speed of less than 1/48, to see if it is a rolling shutter issue?

Andrew (whose PAL HV20 is arriving on Monday morning...)

Steve Royer · April 28th, 2007, 12:21 AM

Quote:

Originally Posted by Dave Blackhurst

Now that Steve has suggested a cool new accessory..... anyone know where I can get a cheap 3.5-6" widescreen with decent resolution???

DB>)

http://stores.ebay.com/LCD4Video_LCD...QQfsubZ3733573

These may be a little larger than you were looking for, but I'm definitely considering one!

Ron Lemming · April 28th, 2007, 05:50 AM

Quote:

Originally Posted by Dave Blackhurst

One comment on your rig (I'd have to see a pic to know for sure) - the wood could simply have too much mass relative to the camera <wink>?

As I said earlier, it works like a charm with my old Sony that's even lighter than the HV20. :)

Here's a raw m2t clip from the HV20 showing my wobbly problem: http://files.filefront.com/7340999
It's all full wide-angle and the camera is on my home made stabilizer in this clip.

Glenn Thomas · April 28th, 2007, 06:40 AM

Personally I think it's best to leave the OIS turned off. Even in the manual they tell you if you're using a tripod to turn it off. Plus, if you're trying to emulate the film look by using either 24P or 25P, you don't want OIS running anyway. Real film cameras don't have OIS. It can't be trusted.

Any wobbly effects would be the rolling shutter. It's annoying, but for the price of the camera I can deal with it. Just plan your shots carefully and avoid any quick movements. Stablizers definitely help and I'd suggest using one or even a tripod/monopod whenever possible. Shooting handheld like a tourist, you'll probably only end up with less than 15% of footage that looks half decent.

Glenn Thomas · April 28th, 2007, 06:51 AM

Ron, by the look of that I'd say there's definitely something wrong with your camera. If you've got the camera on your steadycam, then it looks like there's a spring between the two. Take it back.

For comparison here's my HV20 + $14 steady cam around the house clip I posted in the other thread.. 25P, but at 1/25 shutter speed - http://www.megaupload.com/?d=L2G1OPED

Austin Meyers · April 28th, 2007, 07:03 AM

Quote:

Originally Posted by Robert Hicks

That is an amazing improvement. Is it just metal on metal or do you have any rubber in there?

it's all metal on metal except for the plexi, i've got a couple of rubber washers between the plexi and the bracket, so i can tighten the camera bolt...

ron, i agree with glenn, it looks like a bad ois sensor, or an element out of whack.

Mike Dulay · April 29th, 2007, 09:24 PM

That later DIY glidecam video looked nice. It helps to have nice house. 8-) Any Figrig (DIY or genuine Manfrotto) users have sample video? I'm still doing the finishing touches on mine so I'd like to compare.

Test fit of the PVC figrig:
http://www.flickr.com/photos/84946364@N00/477769830/

Gavin Ouckama · April 30th, 2007, 08:15 AM

Quote:

Originally Posted by Dave Blackhurst

...
really hoping that the cam OIS is at least as good as the HC7, which rocks in that department!

Had to chuckle a little here ...

OIS and "rocking" in the same sentence ... is that a little contradictory ;)

Dave Blackhurst · May 1st, 2007, 06:50 PM

OK, have a HV20 in hand - used my rig, smooth as silk (or it "rocks" <VBG>). still have to shake it down some more, but I'd say if your video is bouncing around there may be a defect in your particular cam...

Dave

Mikko Lopponen · May 1st, 2007, 11:18 PM

That wobbling looks like a rolling shutter issue. All of these hdv-cmos-cameras seem to be influenced by it.

April 29th, 2007, 09:24 PM	#23
Mike Dulay Major Player Join Date: Mar 2007 Location: Somerville, NJ Posts: 304	That later DIY glidecam video looked nice. It helps to have nice house. 8-) Any Figrig (DIY or genuine Manfrotto) users have sample video? I'm still doing the finishing touches on mine so I'd like to compare. Test fit of the PVC figrig: http://www.flickr.com/photos/84946364@N00/477769830/ __________________ DIY, 35mm, HV20: http://www.primitivebuteffective.net

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April 28th, 2007, 06:40 AM	#20
Glenn Thomas Major Player Join Date: May 2005 Location: Sydney, Australia Posts: 320	Personally I think it's best to leave the OIS turned off. Even in the manual they tell you if you're using a tripod to turn it off. Plus, if you're trying to emulate the film look by using either 24P or 25P, you don't want OIS running anyway. Real film cameras don't have OIS. It can't be trusted. Any wobbly effects would be the rolling shutter. It's annoying, but for the price of the camera I can deal with it. Just plan your shots carefully and avoid any quick movements. Stablizers definitely help and I'd suggest using one or even a tripod/monopod whenever possible. Shooting handheld like a tourist, you'll probably only end up with less than 15% of footage that looks half decent.

April 28th, 2007, 06:51 AM	#21
Glenn Thomas Major Player Join Date: May 2005 Location: Sydney, Australia Posts: 320	Ron, by the look of that I'd say there's definitely something wrong with your camera. If you've got the camera on your steadycam, then it looks like there's a spring between the two. Take it back. For comparison here's my HV20 + $14 steady cam around the house clip I posted in the other thread.. 25P, but at 1/25 shutter speed - http://www.megaupload.com/?d=L2G1OPED

May 1st, 2007, 06:50 PM	#25
Dave Blackhurst Inner Circle Join Date: Feb 2007 Location: Apple Valley CA Posts: 4,874	OK, have a HV20 in hand - used my rig, smooth as silk (or it "rocks" <VBG>). still have to shake it down some more, but I'd say if your video is bouncing around there may be a defect in your particular cam... Dave

May 1st, 2007, 11:18 PM	#26
Mikko Lopponen Major Player Join Date: Mar 2006 Location: Helsinki, Finland Posts: 393	That wobbling looks like a rolling shutter issue. All of these hdv-cmos-cameras seem to be influenced by it.