| Re: New waterproof camera review
[Re: ThunderMuffin]
#195655 11/08/09 07:30 PM 11/08/09 07:30 PM |
Joined: Sep 2004 Posts: 2,584 +31NL Tony_F18
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Posts: 2,584 +31NL | Brian: Have you tried the new GoPro HD-Hero yet? I'm thinking of getting one. 1920x1080 at 30fps (15Mbps) and 720p at 60fps. 32GB SD-Card and up to 2.5 hours continuous filming. Judging from the website samples the quality is awesome for such a small device: http://www.goprocamera.com/hdheropreview/ I have the old one already and that thing is basically bomb-proof and its cheap at $299. | | | Re: New waterproof camera review
[Re: erice]
#195685 11/09/09 07:14 AM 11/09/09 07:14 AM |
Joined: May 2004 Posts: 503 BrianK OP
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Posts: 503 | Think of the water hose analogy. High definition resolution is mainly 1920x1080 or 1280x720 pixels. In order to provide information about all those pixels, data must be sent to the tv or from the camera (thats the water flowing down the hose).
In general, the faster the data (or water) the more information and the higher the picture quality. Bandwidth is just as important as screen resolution.
The HD signals in our home cables boxes may be around 5 MBps. A Blu-ray DVD can be as high as 8 MBps. So a Blu-ray will generally look better than the home HD cable, especially with fast motion, water, flashing lights, etc. Video bandwidth directly from a pro camera sensor (called the HD-SDI spec) runs around 185 MBps! Pro cameras record around 100-150 MBps, semi-pro cameras record around 35-50 MBps.
One of the twists in all this is that quality vs bandwidth is also effected by the compression scheme used. The new HD bullet cams coming out are using the latest compression scheme called H264 (aka AVC, aka MPEG4 Part 10) running between 1 and 2 MBps. Pretty low, but for $300 not bad at all.
Next time your looking at HD tv's, ask what signal they are feeding them with. Our Sears was using a standard def signal from VCRs that was up-convertered to HD. I think Best Buy was using an HD signal. If your looking to compare TV's make sure your seeing an HD signal!
Bandwidth may be listed as MBps or Mbps (big B vs little b). Big B is byte, little b is bit. 1 Byte = 8 bits (1 MBps = 8 Mbps). Sales guys love using Mbps because is sounds higher. | | | Re: New waterproof camera review
[Re: BrianK]
#195704 11/09/09 12:28 PM 11/09/09 12:28 PM |
Joined: Mar 2002 Posts: 3,355 Key Largo, FL and Put-in-Bay, ... RickWhite 
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Posts: 3,355 Key Largo, FL and Put-in-Bay, ... | Thanks, Brian. Wish something like that was around in 1989 when I first started doing my Sailing Seminars. I have since gone through at least a dozen cameras.., and not cheap ones either. One thing I could not tell was how do you play back video quickly on a TV screen, i.e., I am out in the morning of a seminar shooting how the students are doing tacks. I need to quickly be able put this on a TV screen before the students get their boats secured and arrive for the de-briefing. And, I must have the ability to show it in slow motion some of the time. How would you suggest using this camera and accomplishing that (or any other means for that matter)
At the moment I am using a camcorder that records on mini-dvd. Works OK, except for having to (can't think of the word) it everytime, and then un do it to continue using the same disk. And the cameras seem very fragile, and will of course be eaten by the salt air, like the dozens before.
Thanks for any insight. These days one has to watch one's pennies. Rick | | | Re: New waterproof camera review
[Re: RickWhite]
#195721 11/09/09 03:53 PM 11/09/09 03:53 PM |
Joined: Dec 2001 Posts: 5,590 Naples, FL waterbug_wpb
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Posts: 5,590 Naples, FL | Rick, what about some form of DVR that you can download your raw video to? Don't DVR let you FF and RW, slow mo, and all that other jazz?
I see some high school football coaches using a little control board with a dial that lets them go forward, backward, slow, etc when looking at their "tapes" (which I suspect are DVD or harddrives from the cameras)
Jay
| | | Re: New waterproof camera review
[Re: RickWhite]
#195773 11/10/09 10:45 AM 11/10/09 10:45 AM | andrewscott
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[Re: ]
#195801 11/10/09 12:51 PM 11/10/09 12:51 PM |
Joined: Dec 2001 Posts: 5,590 Naples, FL waterbug_wpb
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Posts: 5,590 Naples, FL | I think there are some portable DVR setups. I found some recently while looking at security monitors/systems (they also have multi-camera things that put all the shots on one screen, which I was thinking to use for multiple boats/cameras on wireless transmitters with the recorder on the PRO boat
I'm sure BK can build something for you. He's all electrical like that (weren't you a rocket scientitst too? Or the guy who built Ironman's Jehrico system?)
Jay
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