Lux, James P skrev:
On 5/10/09 12:15 PM, "Brooke Clarke" <bro...@pacific.net> wrote:
Hi James:
You might want to get a KIWI-OSD, Video overlay of GPS precision time
stamp. It adds HH:MM:SS EEEE OOOO FFFFFF at the bottom of the image and
so can be seen in every field. They have also developed a way to
calibrate the camera shutter in relation to the frame time by using a
number of LEDs. The main use if for star occulation timing.
http://www.geocities.com/kiwi_36_nz/kiwi_osd/kiwi_osd.htm
Have Fun,
Brooke Clarke
Yes, but that requires getting access to the video stream, which isn't easy
in a "camcorder" environment. Separate video recorders actually cost more
than camcorders.
What precision of anything do you need?
Expect 50-100 ppm oscillators in there.
Recorded material is compressed. Consider how that affects your readout.
Recorded material is said progressive/interlaced. This may not reflect
how the CCD is snapshot and readout. You may not have the expected 1125
or 750 lines per frame, and exactly what frame rate do you have?
Cheers,
Magnus
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