Can't use CRW files - page 3 - RAW Shooting and Processing - CHDK Forum

Can't use CRW files

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Offline uhoh

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Re: Can't use CRW files
« Reply #20 on: 13 / March / 2017, 20:59:48 »
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How long? It's not unusual to run into problems when exposures are many minutes long, but in this case, you will probably get better results taking multiple shots and stacking them. This can be done dedicated software like registax or deep sky stacker, or some general imaging software like gmic.

It was going to all white with exposures of longer than perhaps 43 seconds. I will do another test to determine the exact behavior.

I just did a quick test: I set the max Tv shutter to 17 seconds (and subsequently 38 seconds) and found odd results. Maybe I'm doing it wrong. The exif says:
Shutter Speed Value: 1/0
I'm using ixus125_elph110hs-101a-1.5.0-4769-full_ALPHA
My settings:
http://imgur.com/a/Be7Xc
« Last Edit: 13 / March / 2017, 21:35:55 by uhoh »

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Offline reyalp

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Re: Can't use CRW files
« Reply #21 on: 13 / March / 2017, 23:10:24 »
It was going to all white with exposures of longer than perhaps 43 seconds. I will do another test to determine the exact behavior.
That seems odd, AFAIK 64 seconds or less works on pretty much every camera. Obviously, if there was much light in those 43 seconds it could get over exposed, if it was outside at night I wouldn't expect it to be completely white.

Quote
I just did a quick test: I set the max Tv shutter to 17 seconds (and subsequently 38 seconds) and found odd results. Maybe I'm doing it wrong. The exif says:
Shutter Speed Value: 1/0
I'm using ixus125_elph110hs-101a-1.5.0-4769-full_ALPHA
My settings:
http://imgur.com/a/Be7Xc
Are you looking at the Canon jpeg exif, or CHDK DNG? exif can be wrong when CHDK overrides are used but 1/0 is strange.

What did the images look like?

What software are you checking the exif with? I use exiftool when I need full details.

In your screenshot, you have disable overrides set to yes. This would prevent the override from being used at all if it was set when you were shooting.
Don't forget what the H stands for.

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Offline uhoh

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Re: Can't use CRW files
« Reply #22 on: 14 / March / 2017, 09:28:52 »
Are you looking at the Canon jpeg exif, or CHDK DNG? exif can be wrong when CHDK overrides are used but 1/0 is strange.

What did the images look like?

What software are you checking the exif with? I use exiftool when I need full details.

In your screenshot, you have disable overrides set to yes. This would prevent the override from being used at all if it was set when you were shooting.

In yesterday's test with 1.5, they looked like normal photos with automatic exposure.
And that's to be expected since they did not expose for the 17 or 34 seconds that  I specified, they seemed to expose for ~1 second.

OS/X lets you view the exif of DNGs and JPGs.

I just tried with 1.4.1 and long exposure is not working with it either.
ixus125_elph110hs-101a-1.4.1-4768-full_ALPHA.zip

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UPDATE
OK, I got long exposure working with 1.4.1.
The issue was that the UI is a little confusing. I had "disable overrides" checked, because somehow my eyes read it as "enable overrides".
I guess I assumed the default behavior is to disable overrides.
The checkbox next to the long exposure value became unchecked when I downgraded from 1.5, so once I checked that too it worked.

OK, I got long exposure working with 1.5 too.

Soon I will do some long exposure tests...
« Last Edit: 14 / March / 2017, 09:44:34 by uhoh »

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Offline reyalp

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Re: Can't use CRW files
« Reply #23 on: 14 / March / 2017, 12:41:08 »
The checkbox next to the long exposure value became unchecked when I downgraded from 1.5, so once I checked that too it worked.
Another thing to watch out for is that "Disabled overrides at startup" option is enabled by default.
Don't forget what the H stands for.


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Offline uhoh

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Re: Can't use CRW files
« Reply #24 on: 14 / March / 2017, 17:19:15 »

Another thing to watch out for is that "Disabled overrides at startup" option is enabled by default.

I wonder if perhaps a sort of quick menu can be added that will set all the settings for specific use cases e.g.
1. astronomical photos 40-second exposure
2. taking shots for HDR

Also my camera seems to know what angle it's being held at. I wonder if a level line can be displayed using that angle?

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Offline reyalp

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Re: Can't use CRW files
« Reply #25 on: 14 / March / 2017, 17:39:40 »
I wonder if perhaps a sort of quick menu can be added that will set all the settings for specific use cases e.g.
1. astronomical photos 40-second exposure
2. taking shots for HDR
Currently, scripts are probably the best approach for this kind of thing.
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Also my camera seems to know what angle it's being held at. I wonder if a level line can be displayed using that angle?
The value used to decide picture orientation goes in increments of 90 degrees, so it wouldn't be usable for a level. Some higher end cameras have a separate built in electronic level.
Don't forget what the H stands for.

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Offline Sdack

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Re: Can't use CRW files
« Reply #26 on: 25 / November / 2017, 04:21:26 »
Hey guys,

During some continued investigation of the awesome Rawopint script, I inadvertently reset the RAW settings, resulting in a spectacular Sunset sequence with the .CRW extension that I can't seem to import into DNG4PS2, no matter how many settings I fiddle with trying to create a new profile for my IXUS 160.  I figured out that my sensor is 6170 x 4550 and I know that my picture resolution is 5152 x 2896 but beyond that I'm in the dark.

I did manage to open the sequence in RawTherapee but there's no export to DNG from there, the only decent option is 16bit TIFFs which are weighing in at 170 Meg per frame.  I could cope with that in a temporary deletable step towards an HD video output but I'd like to be able to process to DNG straight from .CRW now I've installed the tool.

Any suggestions for finding out the other settings needed for a successful import?

Cheers
Sdack

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Offline msl

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Re: Can't use CRW files
« Reply #27 on: 25 / November / 2017, 05:42:48 »
I figured out that my sensor is 6170 x 4550 and I know that my picture resolution is 5152 x 2896 but beyond that I'm in the dark.
It seems your values are wrong. I found the following values for the ixus 160 in the chdk source code:
Code: [Select]
    #define CAM_RAW_ROWPIX                  5248    // Found @0xff96986c
    #define CAM_RAW_ROWS                    3920    // Found @0xff969874
    #define CAM_JPEG_WIDTH                  5152
    #define CAM_JPEG_HEIGHT                 3864
    #define CAM_ACTIVE_AREA_X1              0
    #define CAM_ACTIVE_AREA_Y1              0
    #define CAM_ACTIVE_AREA_X2              5192
    #define CAM_ACTIVE_AREA_Y2              3900

msl
CHDK-DE:  CHDK-DE links


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Offline Sdack

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Re: Can't use CRW files
« Reply #28 on: 25 / November / 2017, 06:07:15 »
Thanks @msl,
I didn't know I could look at that source code file.  I will dial in those numbers to DNG4PS2 and see if it likes them.
Have a great weekend
Sdack

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Offline Sdack

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Re: Can't use CRW files
« Reply #29 on: 25 / November / 2017, 17:12:21 »
Well,

That worked a treat!!!

Thanks heaps

S

 

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