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Script shooting faster

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Offline es_maam

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Script shooting faster
« on: 03 / July / 2009, 08:16:47 »
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Hi everyone!:
Is there any way of getting more shoots per second with CHDK?
I'm trying to catch birds while flying and I can only get one shoot every second (more or less), wich is too slow for flying birds... :(
Thank you all for your help!! :)
Miguel
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Offline whim

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Re: Script shooting faster
« Reply #1 on: 03 / July / 2009, 08:27:24 »
hi es_maam !

AFAIK CHDK can't do that, but:
Check out fudgey's Motion Detect script (here: http://chdk.setepontos.com/index.php/topic,471.0.html)

hth,

wim
« Last Edit: 03 / July / 2009, 08:31:36 by whim »
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Offline fudgey

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Re: Script shooting faster
« Reply #2 on: 03 / July / 2009, 13:30:42 »
As wim says, burst speed can't be improved with CHDK, but the fastest you can go on these Digic cameras is when you have
- RAW and DNG disabled,
- low ISO (200 or lower on my camera, above that noise reduction software kicks in and slows things down),
- Tv fast enough compared to burst speed (duh),
- a clean freshly formatted SD card (a large amount of images and/or filesystem fragmentation slow down write speed),
- a fast SD card,
- output image size set equal to shot image size (usually this means full resolution JPEG) to avoid scaling
- medium JPEG quality selected to reduce file size (writing time); full quality images can be very large.

and to squeeze the last drop of speed, but sacrificing a lot of image area, making it harder to catch a moving target:

- use Canon's cropping set as high as it goes if your camera has that feature (it's called the digital tele extension feature or something like that) and match image size to the crop to avoid slow, unwanted scaling (color of the T symbol on screen changes when the camera scales up, that's when you know your resolution is too high).


And it's true, motion detection works perfectly with flying birds, at least near nests where you know they are going to fly in frequently using the same route... you can get amazing in-flight closeups since you don't have to be there scaring the birds.
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Offline reyalp

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Re: Script shooting faster
« Reply #3 on: 03 / July / 2009, 23:23:45 »
"High ISO" mode may also be faster on some newer cameras. See http://chdk.setepontos.com/index.php/topic,2468.msg31042.html#msg31042
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Offline es_maam

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Re: Script shooting faster
« Reply #4 on: 04 / July / 2009, 08:54:33 »
Thank you all for your advises! I'll take them seriously and try to impove my photos!
Miguel
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Offline barret

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Re: Script shooting faster
« Reply #5 on: 08 / July / 2009, 08:42:29 »
Quote
- use Canon's cropping set as high as it goes if your camera has that feature (it's called the digital tele extension feature or something like that) and match image size to the crop to avoid slow, unwanted scaling

what's that? is it the same as enabling tele or wide converter through camera menu? does it really speed up burst rate? did anyone performed such test? i need to check this :]

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Offline fudgey

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Re: Script shooting faster
« Reply #6 on: 08 / July / 2009, 16:01:54 »
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