Quote:
Originally Posted by peter_4059
Troy,
1. WDM is correct and a Dennis recommends I also use 640x480. I've tried the different options (RGB24, IYUV and I420) but have not found any difference in the image - someone else might be able to explain the difference and if one is better than the others but I've found them all to work much the same.
Peter
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Troy,
sorry mate, no idea about PHD but I know a bit about SPC900 webcams.
For guiding purposes on an unmodded cam, you won't find any noticeable
difference between the codecs. But stick with WDM for capture device.
But here's what the codecs mean:
I420 or IYUV uses 12 bits per pixel with 8 bits brightness and the rest for colour.
YUY2 uses 16bits per pixel with 8 bits brightness and the rest for colour.
RGB is uncompressed and uses 24 bits per pixel with 8 bits per R,G,B
Also, an un-modified SPC900 should only be capable of 1/5sec
shutter speed at the best, no longer, definately not seconds long.
This would also, I'd imagine, limit you to only using brighter guide stars
in a field. Unless PHD does some sort of integration and stacks a few frames on the fly
.... dunno.
Steve