A3200IS porting thread - page 10 - DryOS Development - CHDK Forum
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A3200IS porting thread

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Re: A3200IS porting thread
« Reply #90 on: 17 / September / 2012, 13:42:03 »
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Sorry to bother you again guys, but I can't see the way to disable the lcd while the intervalometer script is working.

I have used some already written scripts, but none work

I have read that the command set_backlight() with 0 value seems to wake the lcd again after each shot.

So that's not what I want. I would like the LCD to stay off while the intervalometer is running, and when it reaches the end, wake up the LCD again.
Is that possible? Has someone an intervalometer script for A3200IS with lcd off?

Please, help!
Thanks

PS - If I plug in something (cable or dummy) to the AV plug, it doesn't work. LCD still on
PS2: Well, you surely already know, but in this camera DISP doesn't have any effect on light, it just removes the info from the screen; The camera doesn't have a Zzzz function either. In the menu you can set "Display off" to 10 seconds (the lowest)
« Last Edit: 17 / September / 2012, 13:49:17 by ricardo28 »

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Offline reyalp

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Re: A3200IS porting thread
« Reply #91 on: 17 / September / 2012, 16:26:57 »
I have read that the command set_backlight() with 0 value seems to wake the lcd again after each shot.
That's the way set_backlight works. You could of course turn it off immediately after each shot.

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PS - If I plug in something (cable or dummy) to the AV plug, it doesn't work. LCD still on
This is very unusual, are sure you have the right cable ? Note you can also try
post_levent_to_ui('ConnectVideoCable')
in lua. Use 'DisconnectVideoCable' to turn it back on.

Are you trying to do this for power saving, or is the light from the display a problem for some reason ? FWIW, most people who have measured the power saving from these methods have found it to be fairly insignificant. The only ones that make a big difference are the Canon display off or zzz modes (for the cameras that have them, I understand yours doesn't)
Don't forget what the H stands for.

Re: A3200IS porting thread
« Reply #92 on: 18 / September / 2012, 08:35:02 »
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That's the way set_backlight works. You could of course turn it off immediately after each shot.

Wouldn't be that counterproductive? I prefer not to stress in that way the LCD of the camera.

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This is very unusual, are sure you have the right cable ?

Yes, I was using the wrong cable, my bad. Thanks.

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Are you trying to do this for power saving, or is the light from the display a problem for some reason ?

Save power while running the intervalometer for long times.

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The only ones that make a big difference are the Canon display off

This is what I am interested in, since with set back light the image is still there (only very dark). Any script that implements that?

Thanks again

Re: A3200IS porting thread
« Reply #93 on: 18 / September / 2012, 09:46:09 »
Wouldn't be that counterproductive? I prefer not to stress in that way the LCD of the camera.
Actually,  it's turning the backlight LED's/CCFL off - not the LCD.  Either way, your camera will be long gone or resigned to your the "obsolete" drawer before you have any risk of "stressing" anything to failure.  If nothing else,  the mechanics in the lens will wear out / jam up first.

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Are you trying to do this for power saving, or is the light from the display a problem for some reason ?
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Save power while running the intervalometer for long times.
The only ones that make a big difference are the Canon display off
There are hundreds of posts about this on the forum if you do a little searching.  Lots of stuff about external power supplies too.   

The best study on power savings is probably here :

Camera Power Usage :  bugspatter on battery life in the A590
chdk stuff - a590 power 1
chdk stuff - a590 power 2

It basically says to change the camera from shooting to playback mode when not actually taking a picture.

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This is what I am interested in, since with set back light the image is still there (only very dark). Any script that implements that?
No.  If that was possible to do in a script,  we would not have a command to just turn off the backlight.
Ported :   A1200    SD940   G10    Powershot N    G16


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Offline reyalp

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Re: A3200IS porting thread
« Reply #94 on: 18 / September / 2012, 16:26:19 »
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That's the way set_backlight works. You could of course turn it off immediately after each shot.

Wouldn't be that counterproductive? I prefer not to stress in that way the LCD of the camera.
Doesn't matter if it's productive, it's the way it works, and we don't currently know how to change it. As far as "stress", there has been some discussion that a CCFL backlight might not be designed for so many cycles, but what information I could find googling (see this post http://chdk.setepontos.com/index.php?topic=1768.msg80981#msg80981 ) suggested the expected life of these things is in the hundreds of thousands. An LED backlight should be even less concern. I would expect modern Canons to use LED backlights, but I don't know for certain.

It occurs to me (based on very limited knowledge...) that CCFLs may require additional power at startup. Anyone know ?
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Save power while running the intervalometer for long times.
As mentioned above, turning off the backlight isn't likely to save you a whole lot. Driving the sensor and video hardware (which still runs if you use the video out cable, obviously) appears to take more power than the backlight.
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The only ones that make a big difference are the Canon display off
This is what I am interested in, since with set back light the image is still there (only very dark). Any script that implements that?
Not if your camera doesn't offer some for of that feature in the Canon firmware. A possible area for someone with reverse engineering skills to investigate on cameras like this would be triggering the power save mode on demand, instead of the 10s timer. This would still turn on/off every shot, since you have to go to display on mode to run the sensor, but should provide significant saving compared to just turning the backlight off.
Don't forget what the H stands for.

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Offline nafraf

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Re: A3200IS porting thread
« Reply #95 on: 19 / September / 2012, 01:28:58 »
Thanks to testers.  An alpha version for a3200 100a/100c is in attachment.   The camera firmware file for the 1.00a is different from the 1.00c, but the same CHDK port is working in both models.

Unlock optical zoom during video recording was added in this release.

An untested version for 100d, is in attachment too.

Please test and report.

EDIT
Attachment deleted, patches were added to autobuild.
« Last Edit: 22 / September / 2012, 19:52:33 by nafraf »

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Offline omdhar

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Re: A3200IS porting thread
« Reply #96 on: 19 / September / 2012, 12:42:00 »
Thanks to testers.  An alpha version for a3200 100a/100c is in attachment.   The camera firmware file for the 1.00a is different from the 1.00c, but the same CHDK port is working in both models.

Unlock optical zoom during video recording was added in this release.

An untested version for 100d, is in attachment too.

Please test and report.

After use of  previous and this versions of 1.00A, for me till dt its all ok.

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Offline nafraf

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Re: A3200IS porting thread
« Reply #97 on: 20 / September / 2012, 08:32:46 »
Can any 100d user test and report if the optical zoom during video rec is working?


@omdhar thanks for reporting during development.



Re: A3200IS porting thread
« Reply #98 on: 20 / September / 2012, 14:41:14 »
I'm running 1.00D and optical zoom during recording works...

 :)

Re: A3200IS porting thread
« Reply #99 on: 21 / September / 2012, 00:55:38 »
I'm running 1.0.0.A on 1.0.0.C
Raw file has noticeable lens barrel distortion (slightly fish eye) @ wide (28 mm),
low distortion @ 35 mm but not problem.
Others function work fine.  :)
PS. 1.0.0.A Optical zoom during recording works too.

 

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