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 Post subject: FOV
PostPosted: Tue Sep 01, 2009 7:21 pm 

Joined: Mon Jun 22, 2009 12:37 pm
Posts: 4
How can I find out my Camera's FOV angle. I have a few different kinds of cameras.
Also what would be a good tool for putting 3 videos together side by side like ipi recorder?


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 Post subject: Re: FOV
PostPosted: Wed Sep 02, 2009 10:32 am 

Joined: Mon Aug 03, 2009 1:34 pm
Posts: 2362
Location: Los Angeles
The calibration tool in the Downloads area is for figuring out the FOV of a camera.

BTW, if you happen to be using the Logitech Quickcam Pro 9000, the FOV is about 75. This is the only one I know about.

I think would be nice if there was a list of FOVs for different cameras posted somewhere.

Greenlaw

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 Post subject: Re: FOV
PostPosted: Sat Sep 05, 2009 12:24 pm 
iPi Soft

Joined: Tue Mar 31, 2009 9:13 pm
Posts: 804
Katman1245 wrote:
Also what would be a good tool for putting 3 videos together side by side like ipi recorder?


You should check this discussion on recommendations how to do it:

viewtopic.php?f=3&t=24&p=103


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 Post subject: Re: FOV
PostPosted: Sat Sep 05, 2009 12:39 pm 

Joined: Sun Aug 02, 2009 10:57 am
Posts: 107
Michael Nikonov wrote:
iPi Studio downscales video internally to 320x240 for processing. Input video can actually be any resolution. But it must have 4:3 aspect ratio (current limitation).


Michael - Is this still true?


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 Post subject: Re: FOV
PostPosted: Sat Sep 05, 2009 1:05 pm 
iPi Soft

Joined: Tue Mar 31, 2009 9:13 pm
Posts: 804
McWannabe wrote:
Michael Nikonov wrote:
iPi Studio downscales video internally to 320x240 for processing. Input video can actually be any resolution. But it must have 4:3 aspect ratio (current limitation).


Michael - Is this still true?


No.

Latest version dynamically adjusts resolution. Typically, it processes at 320x240 during first tracking pass and at 640x480 or higher during second tracking pass.


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 Post subject: Re: FOV
PostPosted: Sat Sep 05, 2009 11:16 pm 

Joined: Mon Aug 03, 2009 1:34 pm
Posts: 2362
Location: Los Angeles
So does the system prefer video that's 480 high now? Or does iPi interpolate the 240 version for the high res pass?

Does the capture software allow you to capture at higher res? Just wondering because I think I'm only getting 240 high video now. (Without looking, I'm guessing that I will have to set the res this in the Logitech control panel.) Even if iPi Studio can use higher res, however, I'm not sure my laptop will be able to capture four cameras simultaneously at 480.

I think will have to look into this for my next session.

Greenlaw

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 Post subject: Re: FOV
PostPosted: Sun Sep 06, 2009 10:07 am 
iPi Soft

Joined: Tue Mar 31, 2009 9:13 pm
Posts: 804
If you shoot video at relatively close space (under 5 meters from camera to actor) you should be OK with 320x240. The 640x480 resolution is useful for filming in large capture volume, when you need to film running, jumping, walking etc.

You can select resolutions and frame rates in iPi Recorder.

Modern dual-core laptops are not capable of filming a 3-camera video at 640x480.

You can film with 3 or more cameras at 640x480 if you have a fast CPU (quad-core or overclocked 4 GHz dual-core).


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 Post subject: Re: FOV
PostPosted: Sun Sep 06, 2009 11:36 am 

Joined: Mon Aug 03, 2009 1:34 pm
Posts: 2362
Location: Los Angeles
Michael,

Thanks once again for the useful information! I was planning a shoot at work sometime in the next week or two, which has a much larger space for performance. I thought I would use my laptop to capture video, but with this new information, I will get permission to use one of our on-site workstations instead.

Greenlaw

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 Post subject: Re: FOV
PostPosted: Mon Sep 07, 2009 8:30 am 
iPi Soft

Joined: Tue Mar 31, 2009 9:13 pm
Posts: 804
I've just found out that Logitech webcams (and possibly other webcams, too) have image quality issues at 30 frames per second:

http://forums.quickcamteam.net/showthread.php?tid=548

Basically, people at Logitech forum are saying that Logitech QuickCam Pro at 640x480 @ 30 FPS looks like up-scaled 320x240.

So probably 640x480 do not have much advantage over 320x240.


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 Post subject: Re: FOV
PostPosted: Mon Sep 07, 2009 12:58 pm 

Joined: Sun Aug 02, 2009 10:57 am
Posts: 107
Michael - are there any cameras that do provide the correct output?

BTW - in their current feature list:
http://www.quickcamteam.net/devices/

They still claim 1280 x 720 for 30 fps.

http://www.quickcamteam.net/devices/log ... t_list.pdf


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