I'm trying to tweak a CHDK script for my Canon PowerShot G12 to take pictures at a regular interval. The goal is to make smooth time lapse videos.
I've previously burned the sensor of a G11 because of an unexpected lighting change, and would like to prevent this from happening again. So now I'm looking for a way to either:
- Adjust the exposure slowly over the span of several pictures, or
- Detect a certain level of overexposure and abort the script
Here is what I have so far:
@title Timelapse photo fixed
@param m Interval (min)
@default m 0
@param s Interval (sec)
@default s 5
@param h Number of takes (x100)
@default h 10
@param x Initial delay (sec)
@default x 10
set_raw 0
t=100*h
if t<100 then t=100
i=60000*m+1000*s
if i<100 then i=100
if x<5 then x=5
sleep 1000*x-2000
print "Pressing shutter halfway..."
press "shoot_half"
sleep 2000
for j=1 to t
cls
print "Taking photo",j,"of",t
click "shoot_full"
press "shoot_half"
print " Waiting",m;":";s,"..."
print " "
sleep i
next j
release "shoot_half"
end
(The shoot_half bits are there to prevent the exposure/focus from changing during a shoot; if there is a better way to do that I'd also love to about it.)
Where should I go from here?
