Is there a way to detect when picture is done being taken? - Script Writing - CHDK Forum
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Is there a way to detect when picture is done being taken?

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Offline sas4740

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Is there a way to detect when picture is done being taken?
« on: 01 / August / 2011, 12:43:46 »
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Currently in my scripts I have a "shoot" followed by some amount of sleep. The problem is that sleeping longer than necessary is inefficient and not sleeping long enough forces the script to be out of sync. I'm hoping there's an elegant way to stall the script until an image is done being taken and/or the review of the image is complete.
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Offline msl

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Re: Is there a way to detect when picture is done being taken?
« Reply #1 on: 01 / August / 2011, 13:12:59 »
get_shooting is the command you need. If the shooting is in progress get_shooting returns 1 else 0. When using scripts I would switch off the image review.

msl
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Offline sas4740

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Re: Is there a way to detect when picture is done being taken?
« Reply #2 on: 01 / August / 2011, 13:16:34 »
Quote from: msl on 01 / August / 2011, 13:12:59
get_shooting is the command you need. If the shooting is in progress get_shooting returns 1 else 0. When using scripts I would switch off the image review.

msl

I do switch off image review for scripts, I just wasn't sure if it would change the answer to my question. Thanks!
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Offline sas4740

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Re: Is there a way to detect when picture is done being taken?
« Reply #3 on: 01 / August / 2011, 13:43:10 »
If I run the following:

      shoot
      :wait
      if get_shooting then
         goto "wait"
      endif
      click "button"

The 'click "button" ' does not seem to register. Any thoughts?
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Offline fe50

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Re: Is there a way to detect when picture is done being taken?
« Reply #4 on: 02 / August / 2011, 01:10:20 »
Quote from: sas4740 on 01 / August / 2011, 13:43:10
The 'click "button" ' does not seem to register. Any thoughts?
What "button" do you use in your script ?  ;)
--> http://chdk.wikia.com/wiki/UBASIC/TutorialScratchpad#Camera_Operation_Commands
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Offline reyalp

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Re: Is there a way to detect when picture is done being taken?
« Reply #5 on: 02 / August / 2011, 01:20:06 »
Quote from: sas4740 on 01 / August / 2011, 13:43:10
If I run the following:

      shoot
      :wait
      if get_shooting then
         goto "wait"
      endif
      click "button"

The 'click "button" ' does not seem to register. Any thoughts?
shoot actually takes care of waiting on get_shooting for you already, you only need a get_shooting loop if you are doing the key presses yourself. If some additional delay is needed, you'll have to have a fixed sleep for that.

What camera are you using ?
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Offline sas4740

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Re: Is there a way to detect when picture is done being taken?
« Reply #6 on: 02 / August / 2011, 08:31:39 »
Quote from: fe50 on 02 / August / 2011, 01:10:20
Quote from: sas4740 on 01 / August / 2011, 13:43:10
The 'click "button" ' does not seem to register. Any thoughts?
What "button" do you use in your script ?  ;)
--> http://chdk.wikia.com/wiki/UBASIC/TutorialScratchpad#Camera_Operation_Commands

I just wrote "button" to make it generic. It's in fact the 'erase' button.

Quote from: reyalp on 02 / August / 2011, 01:20:06
Quote from: sas4740 on 01 / August / 2011, 13:43:10
If I run the following:

      shoot
      :wait
      if get_shooting then
         goto "wait"
      endif
      click "button"

The 'click "button" ' does not seem to register. Any thoughts?
shoot actually takes care of waiting on get_shooting for you already, you only need a get_shooting loop if you are doing the key presses yourself. If some additional delay is needed, you'll have to have a fixed sleep for that.

What camera are you using ?


SX20 IS.

I don't want more delay than is necessary, but I've found that the operation time for shooting an image can vary with the camera. Sometimes if the conditions change right before an image is taken, shooting will take much longer, and subsequent button presses will not occur. Dropping in a 'sleep 3000' may guarantee that the picture will be taken, but it's an unnecessary delay in other cases.
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Offline funnel

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Re: Is there a way to detect when picture is done being taken?
« Reply #7 on: 02 / August / 2011, 12:48:12 »
I was interested if this would work with the combination of shoot_half and shoot_full_only discussed here http://chdk.setepontos.com/index.php?topic=1444.0. Get_shooting returns 1 when "shoot_half" is pressed so it doesn't work.

This one is ok:
Code: [Select]
:loop
a=get_shooting
if a=0 then
click "shoot_full"
endif
goto "loop"

end
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