My new GS400 demo at DVinfo.net

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Old October 8th, 2004, 01:40 PM   #1
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My new GS400 demo

Hello everyone,

Here is my new GS400.

The file is around 8mb encoded with divx.

http://www.salenz.com/movie/gs400demo.avi

Using JVC GY-DV5000U with FUJINON S20X6.4BRM-SD lense.

You may need to download latest divx decoder from www.divx.com

Thank you for your time to read my message and I look forward to hearing from you.

Regards
Leigh
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Old October 8th, 2004, 06:33 PM   #2
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I thought this was footage from your GS400 or at least a comparison between the GY-DV5000U and GS400.

So this is just you circling your GS400 on a tripod with a GY-DV5000U? Correct?

Keep the footage coming!
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Old October 8th, 2004, 07:04 PM   #3
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Looks good - will you also post a clip with the camera's exchanged?

I'm new to codecs - too. May I ask why you chose divx - and not mpeg2? Because it has better quality for the same compression ratio? Because it is free? Have you tried other codecs?

A couple of days I saw that the BBC (of all) is working on a new codec http://www.bbc.co.uk/rd/projects/dirac/overview.shtml - a competitor to H264 I guess.

Now that I'm writing - here's a link to what I think is good info about video'ing - for beginners like me
http://www.adobe.com/motion/primers.html
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Old October 8th, 2004, 11:29 PM   #4
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<<<-- Originally posted by Tommy Haupfear : I thought this was footage from your GS400 or at least a comparison between the GY-DV5000U and GS400.

So this is just you circling your GS400 on a tripod with a GY-DV5000U? Correct?

Keep the footage coming! -->>>

Dear Tommy,

Thanks for your interest.

Here it is. Shot by GS400 japanese edition.

http://www.salenz.com/movie/gs400.avi

Due to divx heavy compression, the quality may not be so good, I can't afford to put original avi file nor mpeg2 file on web server for viewing.

Sorry for the shakeness of the footage.

Regards
Leigh
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Old October 9th, 2004, 07:20 PM   #5
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Dear Claus,

>>Looks good - will you also post a clip with the camera's >>exchanged?

Here answers your request.

http://www.salenz.com/movie/jvc.avi

Shot using my panasonic GS400

The camera in the video is JVC GY-DV5000.

The file is around 30mb encoded with divx with highest video quality.

You may need to download latest divx decoder from www.divx.com

Thank you for your time to read my message and I look forward to hearing from you.

Regards
Leigh
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Old October 9th, 2004, 11:06 PM   #6
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Thanks Leigh - looks real good - and even better than the first one with the camera's exchanged. But there is also more light with this one.
I shot some test video today also with a GS400. Just as with your clip I notice that close-ups are indeed of very good quality. Also, I see that I'm not the only one to get those ice crystal diamonds on the video when light is in front of the camera.
I'm guessing that you had OIS turned on - or do you just have a steady hand (is that you on the video getting someone else to do the work)? I forgot - and got some shaky video. But the encoding process removed some it.
Does divx become mpeg2 in highest quality setting? Because, I encoded with mpeg2, shot 7 min and got 230 MB. That's the same ratio as yours of 1 min and 29Mb. I think, though, that yours is of better quality - also disregarding the shakyness of mine. I'll have to try divx.
My video player (on Linux) shows your video as 640x464 - not 720x480 (NTSC). I'm wondering if the player is wrong or did you set it as such?
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Old October 10th, 2004, 12:18 AM   #7
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<<<-- Originally posted by Claus Olesen
My video player (on Linux) shows your video as 640x464 - not 720x480 (NTSC). I'm wondering if the player is wrong or did you set it as such? -->>>

I can't set to 720x480 (NTSC) in divx.
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Old October 10th, 2004, 12:21 AM   #8
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<<<-- Originally posted by Claus Olesen : Also, I see that I'm not the only one to get those ice crystal diamonds on the video when light is in front of the camera.-->>>

In the video, which GS400 act as model, you may see that I put a diy mattebox in front of the lense hood which has a UV filter. I guess that those ice crystal diamonds on the video when light is in front of the camera is caused by that UV filter. But I am not exactly sure about this.
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Old October 10th, 2004, 12:23 AM   #9
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<<<-- Originally posted by Claus Olesen : Just as with your clip I notice that close-ups are indeed of very good quality. -->>>

I think that the closer to the subject, the more light comes to the video camera. The relationship maybe relate to the square of the distance between the lense and shooting subject. I am not exactly sure about this too.
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Old October 10th, 2004, 12:26 AM   #10
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<<<-- Originally posted by Claus Olesen : I'm guessing that you had OIS turned on - or do you just have a steady hand (is that you on the video getting someone else to do the work)? I forgot - and got some shaky video. -->>>

I am designing a stablizer which is in the patent process, so I can't show you the picture of the stablizer. GS400 is on that stablizer, but I used to my big JVC camera which weighs around 7kg, so the footage shot by gs400 is quite shaking. As GS400 only weighs around 800g.

The first video which GS400 act as a model one is using my big camera on my same stablizer.
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Old October 10th, 2004, 01:32 AM   #11
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I had a UV filter on also. I'll try without it and see if those diamonds disappear. If they do then maybe just use a clear glass filter instead. I'm using it just for protection. Besides, some say that the UV and haze part of the filter doesn't do much - unless you're also a mountain climber.

Interesting - that you're designing a stabilizer. I shot some of my test footage while riding my bike and the result is actually not as bad as I thought it would be. But it made me think about the same. I was thinking of having the camera in a birdcage kind of contraption maybe hanging in a spring and stabilized by a gyro - like a spintop (kids toy). It would look ridiculous but who cares. I guess it would take 3 gyros - one for each dimension. Then again - the gyros would require power which means more batteries to carry around. Or maybe just put some weight in the cage - like lead. But good luck with the project. When will you release it?
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Old October 10th, 2004, 02:04 AM   #12
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<<<-- Originally posted by Claus Olesen : But good luck with the project. When will you release it? -->>>

THX

I don't know when I can release it. I first need to train myself to be a skilled cameraman. I can't afford to hire a steadicam operator to do demo video. And if I can not show the world how steady the footage is using my stablizer, there is no point to release it.

Regards
Leigh
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Old October 10th, 2004, 08:05 AM   #13
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Or just pick up a military grade gyro for your cam here.

Here is another shot.

If money is no object. :)
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Old October 10th, 2004, 08:38 AM   #14
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WOW! What a link! Thanks, Tommy.

Here's what Ron Dexter has to say about them:
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Old October 10th, 2004, 01:21 PM   #15
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Thanks for the link! And ouch! $1200 a piece - and they recommend two! If they should come down to $200 a piece I might get one. 22000 rpm? - makes me feel safer that they are in a hermetically sealed container - in case something should come loose. I wonder what airport security would say. But they appear to work - only the dents and dirt on the windshield of the plane on the video are shaking.
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