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Posted by Jan Panteltje on 12/25/06 15:29
On a sunny day (Mon, 25 Dec 2006 07:15:57 -0800) it happened "Richard Crowley"
<rcrowley@xpr7t.net> wrote in <12ovqpgj6op4b5b@corp.supernews.com>:
>"Jan Panteltje" wrote ...
>> "Richard Crowley" wrote...
>>>Video resolution is frozen at 720x480. This is the same
>>>for every video camera in NTSC-land (720x586 in the
>>>PAL-territories).
>>
>> Richard, I have a cheap Mustek mpeg4 one, that records on SD card,
>> and I just tested that.
>> It does 640x480 @ 30fps (or 25fps), and has digital zoom.
>> The sensor itself is 3M pixels (2048 x 1536).
>> For the same lens setting, and all digital zoom settings, the image
>> is always calculated down to 640x480.
>> This means if I zoom in digitally, then I will indeed pass a point
>> where I am using only a 640 pixels wide part of the sensor :-)
>> Digital zoom simply uses only a smaller area of the image sensor,
>> and recalculates it to required the output format.
>
>The OP wants to record a "wide shot" so that he can do a
>digital zoom AFTER THE FACT (in post-production editing).
>That would imply that he must record the 2048 x 1536 x 30fps
>"video" (somehow?) so that he can then go back and select
>which 640x480 part of the mage he wants at each moment.
>How do you do this exactly? I'm sure many of us would be
>very interested. I'd love to do it myself.
Of course he cannot do that in post :-)
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