Extra Intervalometer feature - page 6 - Script Writing - CHDK Forum
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Extra Intervalometer feature

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Re: Extra Intervalometer feature
« Reply #50 on: 07 / April / 2014, 18:51:27 »
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The problem with a generic script that tries to be all things to all cameras is that not everything works for every camera. The first two options you tried won't actually work for your camera.

With the  LCD off function set to DispKey after about 1 minute it gave the message " set display off" once  then "unable to change display" once and then just kept doing its thing with the display on always on except during exposure.
The DispKey function only works for cameras with an OVF (optical view finder).  Those camera typically have a mode where the LCD is turned off and you get to it but repeatly pressing the DISP button.  This turns out to be one of the lowest power consumtion modes for a Canon P&S camera - but only works for some cameras.

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With the  LCD off function set to ShrtCut after 30 seconds would display  "toggle sleep mode" after every shot and then just kept doing its thing with the display on always on except during exposure.
The ShrtCut function is only useful on Canon cameras that have a shortcut key (typically the Print Button). The Canon firmware lets you select something to happen when you press that key so you can configure it for "Display Off" when the button is pressed.   When the ShrtCut option is picked, the script then presses the shortcut button to turn off the display at the appropriate time.

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With the  LCD off function set to BKLite, after about a minute and a half  it began to display  "set backlight off"   after every shot.  It would display a live view briefly just before the next shot, then go dark during exposure then display "set backlight off" for a second then go dark for remainder of interval time and repeat.  So basically you had the display on for a second before and after each shot.
Again, pefectly normal.  There are literally hundreds of posts on this forum about people wanting to turn off the backlight to save power and using the script set_backlight() function, only to discover the backlight turns on again after each shot.  The script handles that by turning it back off after each shot.   Prior to the set_lcd_display() function being added to CHDK,  this was as good as it gets for most cameras.

So, in conclusion,  what you see for your camera is typical for cameras like yours. It will get better at my next script update. And in my defense,  this is actually all described in this forum thread  :  Yet Another Sunset Script (yass)   I think the term is RTFM .. not that anyone (including me) does.
Ported :   A1200    SD940   G10    Powershot N    G16

Re: Extra Intervalometer feature
« Reply #51 on: 07 / April / 2014, 19:12:46 »
   I think the term is RTFM .. not that anyone (including me) does.

I'm sometimes guilty of this too. Especially if it has to do with coding of any kind.

This goes back to my idea of an external battery pack.  Obviously not every script is going to work like a charm.  I think that having a more reliable power source would probably be easier (in my case) to solve these shortcomings.

Re: Extra Intervalometer feature
« Reply #52 on: 07 / April / 2014, 20:25:47 »
This goes back to my idea of an external battery pack.  Obviously not every script is going to work like a charm.  I think that having a more reliable power source would probably be easier (in my case) to solve these shortcomings.
This might help calibrate your expectations :  http://chdk.setepontos.com/index.php?topic=9049.0
Ported :   A1200    SD940   G10    Powershot N    G16

Re: Extra Intervalometer feature
« Reply #53 on: 08 / April / 2014, 08:44:22 »
This goes back to my idea of an external battery pack.  Obviously not every script is going to work like a charm.  I think that having a more reliable power source would probably be easier (in my case) to solve these shortcomings.
This might help calibrate your expectations :  http://chdk.setepontos.com/index.php?topic=9049.0

Those times and shot counts are much better than what I get with the stock battery.  Using two 18650 cells would perform yet better than the AA.  The screen bring off though makes a huge difference in the duration.  I have the option of using even 3 or 4 cells in parallel though I don't think I'll need that.

I can usually get about 2 hours and about 400 pics at most with the stock charge.


Re: Extra Intervalometer feature
« Reply #54 on: 09 / April / 2014, 21:16:48 »
Hey Waterwingz,

I've been noticing while using meteor2 script that my time-lapses were looking the same regardless of the ISO setting chosen.  I decided to take series of pics in the fairly dark room with a 1 sec exposure time at each ISO level up to 3200.  It turns out they are all identical.  I also did a series of pics with the camera with CHDK off, in program mode at each ISO setting up to 3200.  In this case there is an obvious difference as the ISO ramps up from black to very visible.

When comparing the meteor2 pics with the standard pics,  the 1600 ISO pic was nearly identical to all the meteor pics.  The image is very visible considering the low amount of lighting with quite fair amount of grain/noise.

Have you run into anything like this?   

With my previous A4000,  the ISO differences were very obvious with meteor. 
Something that comes to mind and my be of some help is when I tried to run LookupSv96.bas on my 300 HS the script would not run correctly, it would just start and then finish while with the A4000 it ran correctly displaying ISO to Sv96 values.

I'm sure this is something specific to my camera.

Thanks Wingz

Re: Extra Intervalometer feature
« Reply #55 on: 09 / April / 2014, 22:48:35 »
With my previous A4000,  the ISO differences were very obvious with meteor. 
Were you using the latest meteor2.lua version when you did that?  I may have broken something in the latest updates.

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I'm sure this is something specific to my camera.
Maybe.  Or maybe not.  Can you attach a copy of the LookupSv96.bas file you are using to a post here? I'm not familiar with that script but depending on how old it is, it might be using thing specific to one particular camera model. The only way I can tell is to check the code.

Ported :   A1200    SD940   G10    Powershot N    G16

Re: Extra Intervalometer feature
« Reply #56 on: 09 / April / 2014, 23:13:34 »
Yep. I was using Meteor v2.4

I attached the script I used in the past to lookup Sv96-ISO values with the A4000 camera.  I thought it was odd that it didn't work with the ELPH 300 HS.

Funny thing is that when I was using the ELPH 300 with the Meteor2 script set to 400 ISO, I was real surprised at how well and bright the stars were appearing on the photos (even though somewhat grainy, so I decided to up the ISO to see how much more would appear and that was when I noticed it was the same.

Thanks

Re: Extra Intervalometer feature
« Reply #57 on: 09 / April / 2014, 23:31:44 »
I attached the script I used in the past to lookup Sv96-ISO values with the A4000 camera.  I thought it was odd that it didn't work with the ELPH 300 HS.
I had a quick look. Certainly a bizarre little script.

If you run the script with the camera's ISO mode set to AUTO, it will terminate right away.  If you have the ISO set to any other value it will run through the different ISO values that CHDK has been setup to use.

Try the script with the Canon ISO setting at 100 on your ELPH300HS  ?
« Last Edit: 09 / April / 2014, 23:34:01 by waterwingz »
Ported :   A1200    SD940   G10    Powershot N    G16


Re: Extra Intervalometer feature
« Reply #58 on: 10 / April / 2014, 00:46:17 »
I tried your suggestion with some strange results.    It seems I would have to switch to a different ISO after each run of the script otherwise it would just display "start" then "finish" if tried more than once while at same ISO.

Set at Auto:

ISO    SV96
1600  411
100    507
200    603
400    699
800    795
1600  891
3200   891

Set at ISO 100:

ISO    SV96
100    411

Set at ISO 200:

ISO    SV96
200    411
100    507
200    603
400    699
800    795
1600  891
3200   891

Set at 400:

ISO    SV96
400    411
100    507
200    603
400    699
800    795
1600  891
3200   891

Set at 800:

ISO    SV96
800    411
100    507
200    603
400    699
800    795
1600  891
3200   891

Set at 1600:

ISO    SV96
1600  411
100    507
200    603
400    699
800    795
1600  891
3200   891


Set at 3200:

ISO    SV96
3200  411
100    507
200    603
400    699
800    795
1600  891
3200   891

Re: Extra Intervalometer feature
« Reply #59 on: 10 / April / 2014, 07:54:45 »
I tried your suggestion with some strange results.
So you want me to actually fix the script too ?  I did mention that it was bizarre.

Here you go then  - initializes correctly and does not need to be out of ISO Auto mode.

;)
« Last Edit: 10 / April / 2014, 09:36:13 by waterwingz »
Ported :   A1200    SD940   G10    Powershot N    G16

 

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