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Rocket Launching of
September 1, 2013 |
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Some observations on cheap spy cameras and
digital memory. |
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If you read the text on page 3 about the
video frame rate you remember the comments about the memory card
speed. |
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Below is a comparison video made to show the difference
between Class 4 and Class 10. Unfortunately I don't have the
software
to make a split screen movie, so you'll have to watch them in
succession. The video is about a minute long. |
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Two cameras were taped together, one
with a Class 4 card and one with a Class 10. Then a fake rocket
launch was made.
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I swung the camera around quite a bit and a lot of the video
is a blur, but what you are looking for is the video
"stuttering".
In other
words, the video will freeze as it strobes the
pixels into memory. It is apparent in the Class 4 card, but
not so much in the Class 10. |
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-- mouse over for controls --
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I suppose that a "real" camera would
make a better video, but there are some financial aspects involved
here. There is $20 invested
in
the rocket and three $6.99 cameras attached to it. Each camera
has a $5 memory card. If the rocket ends up in a tree there is a
loss of
$56 bucks. OK, maybe not a big deal, we lose a rocket at every
launch, but I'd rather put a $100 camera on a rocket I know we'll get back.
We need a bigger field!
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This
concludes our broadcast day.
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