Simultaneous dual function buttons (Have a button do 2 things at the same time) - Feature Requests - CHDK Forum
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Simultaneous dual function buttons (Have a button do 2 things at the same time)

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Offline Razor512

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Simultaneous dual function buttons (Have a button do 2 things at the same time)
« on: 07 / September / 2013, 16:59:20 »
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It would be great if CHDK allowed users to have a single button perform 2 functions at the same time as it will solve many issues with some cameras.

For example, on the powershot sx230 HS, if the CHDk OSD is enabled then you cannot record video as the camera will crash/ shut off after a few seconds with the lens still extended.

Because of that, the OSD must be disabled before recording video.


But if the OSD could be automatically disabled when the record button was pressed, then enabled again when the button was pushed again to stop recording, then the crash would not happen.

The feature could possibly even be taken further, for example if there is a way to get CHDK to detect which ISO the camera is set to, then we can probably have a option where for ISO 100-1600, DNG 1.2 is used, then for ISO 3200 DNG 1.3 is used

DNG 1.3 does not seem to need the badpixel file as it has it included with the file but not all applications like DNG 1.3 as they will not read the bad pixel data

While a bad pixel file can be created with the camera set to ISO 3200, you end up with the camera mapping out twice as many pixels, thus you will be mapping out good pixels at lower ISO's
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Offline nafraf

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Re: Simultaneous dual function buttons (Have a button do 2 things at the same time)
« Reply #1 on: 07 / September / 2013, 22:03:50 »
Quote from: Razor512 on 07 / September / 2013, 16:59:20
For example, on the powershot sx230 HS, if the CHDk OSD is enabled then you cannot record video as the camera will crash/ shut off after a few seconds with the lens still extended.
What is the fw version of your camera?
EDIT:
I saw that your sx230 is 101b, I'll send you a PM with a version for test.
« Last Edit: 07 / September / 2013, 22:14:48 by nafraf »
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Offline reyalp

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Re: Simultaneous dual function buttons (Have a button do 2 things at the same time)
« Reply #2 on: 07 / September / 2013, 22:27:55 »
Quote from: Razor512 on 07 / September / 2013, 16:59:20
While a bad pixel file can be created with the camera set to ISO 3200, you end up with the camera mapping out twice as many pixels, thus you will be mapping out good pixels at lower ISO's
It won't map out good pixels at lower ISO, it will just take a bit more time and memory. The pixel isn't patched if the value isn't marked as bad  (0 value) by the canon firmware. The only reason badpixel.bin exists is that scanning the whole frame buffer for 0 valued pixels each shot would be too slow.

The crashing in video mode is a bug in the port.
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Offline Razor512

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Re: Simultaneous dual function buttons (Have a button do 2 things at the same time)
« Reply #3 on: 07 / September / 2013, 23:54:59 »
hmm I think I may have come across another issue, if I set the camera to an ISO of 3200, and then generate the badpixel file, the camera will not save any raw files

But generating the badpixel file at ISO 1600 allows raw files to be saved again,

at ISO 1600 the badpixel file is 63KB in size, and at ISO 3200, the file grows to 281KB in size

sx230hs-101b-1.2.0-3076-full_BETA
« Last Edit: 08 / September / 2013, 00:00:32 by Razor512 »
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Offline Razor512

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Re: Simultaneous dual function buttons (Have a button do 2 things at the same time)
« Reply #4 on: 13 / September / 2013, 05:28:07 »
Yay, nafraf was able to fix the osd crashing issue when recording video with the sx230 hs.
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