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On Tue, 2 Jan 2007, Jonathan King wrote:
On 1/2/07, Mike Miller <EMAIL:PROTECTED> wrote:
How many minutes of video can he record on one SD card? Or how many
minutes per GB?
This is just 640x480 video, but it's evidently recorded in a somewhat
compressed format; I think they quote 48 minutes of video for 1 GB.
Post-processing on a PC could/should get that down a fair amount.
In any case, the quality is good enough for the 11 year old to figure
out the importance of holding the camera steady, of having the subject
in your frame, and, when doing voice overs, to slow down a bit when you
talk. Still, just under $100 for a portable device that can do this at
all is pretty impressive in my book.
That is amazing, truly. It is also a really good price for that device.
My old digital video camera uses digital tape and uses 1 GB for every 5
minutes of raw video -- that's 12 GB per hour. I was a little
disappointed when I found out how huge those video files were!
Without knowing the resolution, I'm not really sure if that's good or
bad. Obviously, getting this into a reasonably compressed form is
important, which is why it's so cool that FFmpeg and friends are around
these days.
It took a while to figure this out. I guess the resolution is about
622x466 pixels. I would describe the 12 GB per hour encoding as very bad.
It might be good for some purpose (it's probably very fast to encode), but
it takes up massive amounts of space. I bought the thing in 1999 but I
only recently bought a computer that could really cope with the digital
video. I found this paragraph on a web page:
The camera has (about) 460,000 "gross" pixels. What Sony doesn't mention
on their web page (but is in the TR7000 manual) is that it uses (about)
290,000 "active" pixels at any one time to form the image (eg. 622x466
pixels). The pixel oversupply is used for digital stabilization; sliding
the active pixel window around on the CCD to counteract image shake from
handheld shooting. Turning off "steadyshot" does not noticibly improve
image quality.
That was written about a different camera, but I'm pretty sure it applies
to mine as well. My camera is a Sony DCR-TRV510 Digital8 Camcorder.
Mike
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