DNGs do not show up when viewing card in camera via USB- SX100 - General Help and Assistance on using CHDK stable releases - CHDK Forum
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DNGs do not show up when viewing card in camera via USB- SX100

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Offline shinnen

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DNGs do not show up when viewing card in camera via USB- SX100
« on: 13 / June / 2019, 11:23:05 »
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Hi,
      I have checked the 'save RAW', 'with JPG, and 'DNG visible via USB', but they do not show up, when viewing the SD card IN THE CAMERA. However, I can see them if I put the SD card into my card reader. Any ideas what might be causing this?
Thanks,
..... john
« Last Edit: 13 / June / 2019, 11:25:30 by shinnen »
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Offline waterwingz

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Re: DNGs do not show up when viewing card in camera via USB- SX100
« Reply #1 on: 13 / June / 2019, 11:49:12 »
Quote from: shinnen on 13 / June / 2019, 11:23:05
I have checked the 'save RAW', 'with JPG, and 'DNG visible via USB', but they do not show up, when viewing the SD card IN THE CAMERA. However, I can see them if I put the SD card into my card reader. Any ideas what might be causing this?
When you say "viewing the SD card IN THE CAMERA"  do you mean viewing the SD card contents on the LCD screen of the camera?  Or viewing the SD card contents in the camera over a USB cable from your PC?

If it's the former,  you are not going to be able to look at RAW image on the camera's LCD screen.

If it's the later, that's normal.  The PTP software only looks for files with a .JPG extension. Sometimes changing the saved extension with the CHDK menu to use  .CR2 or other extension has been reported to help with this.
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Ported :   A1200    SD940   G10    Powershot N    G16
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Offline shinnen

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Re: DNGs do not show up when viewing card in camera via USB- SX100
« Reply #2 on: 13 / June / 2019, 13:38:06 »
Hi waterwingz,       
         Yes, I meant viewing the files on the SD card in the camera, via the USB cable on the computer screen.
         I tried changing the extensions and the .wav was the only one visible.  When I changed the extension to .dng or .jpg and looked at them using Helicon filter, they looked very strange.         So, it looks like I'll have to put the card into my card reader for raws. That's not a big deal. I used to do that for everything, but one of my cameras became finicky and would occasionally refuse to read the SD card. I was told that taking the card in and out of the camera gets the contacts dirty, so I started reading the cards directly from the camera.
Thanks,...... john
« Last Edit: 13 / June / 2019, 13:41:07 by shinnen »
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Offline waterwingz

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Re: DNGs do not show up when viewing card in camera via USB- SX100
« Reply #3 on: 13 / June / 2019, 14:16:41 »
Quote from: shinnen on 13 / June / 2019, 13:38:06
  When I changed the extension to .dng or .jpg and looked at them using Helicon filter, they looked very strange.
Are you saving the original images as DNG or as RAW in the camera? 

Use .DNG

CHDK .RAW files are not recognized by most PC software (depends on the camera model and the imaging library used by the program).
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Ported :   A1200    SD940   G10    Powershot N    G16
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Offline shinnen

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Re: DNGs do not show up when viewing card in camera via USB- SX100
« Reply #4 on: 13 / June / 2019, 22:23:24 »
Hi,      I set the 'raw file extension' to '.wav' and checked off 'DNG format' in CHDK.Then I took a picture, which showed up as a wav file, on the camera's SD card, via the computer screen. I then changed the the wav extension to dng and viewed it in Helicon filter. Then I changed it to jpg, and again viewed it in Helicon filter. Both the dng and jpg versions looked odd. I did this with all the raw file extensions in CHDK; but the wav extension was the only one that showed up while viewing the SD card in the camera. The others appeared when I put the SD card in my  reader, but I didn't open them....... john

Quote from: waterwingz on 13 / June / 2019, 14:16:41
Quote from: shinnen on 13 / June / 2019, 13:38:06
  When I changed the extension to .dng or .jpg and looked at them using Helicon filter, they looked very strange.
Are you saving the original images as DNG or as RAW in the camera? 

Use .DNG

CHDK .RAW files are not recognized by most PC software (depends on the camera model and the imaging library used by the program).
« Last Edit: 13 / June / 2019, 22:25:16 by shinnen »
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Offline waterwingz

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Re: DNGs do not show up when viewing card in camera via USB- SX100
« Reply #5 on: 13 / June / 2019, 22:40:42 »
Quote from: shinnen on 13 / June / 2019, 22:23:24
Hi,      I set the 'raw file extension' to '.wav' and checked off 'DNG format' in CHDK.Then I took a picture, which showed up as a wav file, on the camera's SD card, via the computer screen. I then changed the the wav extension to dng and viewed it in Helicon filter. Then I changed it to jpg, and again viewed it in Helicon filter. Both the dng and jpg versions looked odd. I did this with all the raw file extensions in CHDK; but the wav extension was the only one that showed up while viewing the SD card in the camera. The others appeared when I put the SD card in my  reader, but I didn't open them....... john
You don't really define what "looked odd" means but it sounds like Helicon is showing you the DNG thumbnail and not looking at the actual image data?
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Ported :   A1200    SD940   G10    Powershot N    G16
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Offline shinnen

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Re: DNGs do not show up when viewing card in camera via USB- SX100
« Reply #6 on: 14 / June / 2019, 19:15:22 »
Hi waterwingz,         My apologies. The file looked odd (had a purplish cast) because I forgot to tell Helicon Filter to use the Adobe converter for DNG files. When I did that the image looked normal. However, Windows (7) explorer will not allow me  to change the file extension while the SD card is in the camera, only if it's in the card reader; which defeats the purpose, because dng files show up in the card reader anyway.
I'm sorry if this is confusing. The entire issue is resolvable if I simply remove the SD card from the camera and put it into the card reader, which is what I will do in the future.
Thanks VERY much for your help. I appreciate it.
....... john
Quote from: waterwingz on 13 / June / 2019, 22:40:42
Quote from: shinnen on 13 / June / 2019, 22:23:24
Hi,      I set the 'raw file extension' to '.wav' and checked off 'DNG format' in CHDK.Then I took a picture, which showed up as a wav file, on the camera's SD card, via the computer screen. I then changed the the wav extension to dng and viewed it in Helicon filter. Then I changed it to jpg, and again viewed it in Helicon filter. Both the dng and jpg versions looked odd. I did this with all the raw file extensions in CHDK; but the wav extension was the only one that showed up while viewing the SD card in the camera. The others appeared when I put the SD card in my  reader, but I didn't open them....... john
You don't really define what "looked odd" means but it sounds like Helicon is showing you the DNG thumbnail and not looking at the actual image data?
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Offline waterwingz

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Re: DNGs do not show up when viewing card in camera via USB- SX100
« Reply #7 on: 14 / June / 2019, 20:44:36 »
Quote from: shinnen on 14 / June / 2019, 19:15:22
However, Windows (7) explorer will not allow me  to change the file extension while the SD card is in the camera, only if it's in the card reader; which defeats the purpose, because dng files show up in the card reader anyway.
The entire issue is resolvable if I simply remove the SD card from the camera and put it into the card reader, which is what I will do in the future.
I thought the whole point here was that you did not want to remove the SD card from the camera?  If so, copy the file from the camera to your PC and rename it there?
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Ported :   A1200    SD940   G10    Powershot N    G16
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Offline BuckSkin

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Re: DNGs do not show up when viewing card in camera via USB- SX100
« Reply #8 on: 14 / June / 2019, 20:45:37 »
Quote from: shinnen on 13 / June / 2019, 13:38:06
I was told that taking the card in and out of the camera gets the contacts dirty,

I hope you got your issue resolved; I have had and am having plenty of my own.

As for the memory-card dirty contacts issue, unless you are tossing the cards in the hog lot when they are out of the camera, the reverse is true.
When electrical contacts stay in constant contact, they oxidize and develop all sorts of chemical reactions that impede good electrical continuity; whereas, when you occasionally disconnect and reconnect, you are in effect dislodging this crud and, in a crude manner, polishing the contact surfaces.
It is the same principle as wiggling the wire on a poorly wired trailer and all the lights start working.
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Offline shinnen

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Re: DNGs do not show up when viewing card in camera via USB- SX100
« Reply #9 on: 15 / June / 2019, 23:41:24 »
Hi Buckskin,        You may be right. I can only say that since I've been leaving the card in, I have had no issues with cards.Thanks for your help...... john
Quote from: BuckSkin on 14 / June / 2019, 20:45:37
Quote from: shinnen on 13 / June / 2019, 13:38:06
I was told that taking the card in and out of the camera gets the contacts dirty,

I hope you got your issue resolved; I have had and am having plenty of my own.

As for the memory-card dirty contacts issue, unless you are tossing the cards in the hog lot when they are out of the camera, the reverse is true.
When electrical contacts stay in constant contact, they oxidize and develop all sorts of chemical reactions that impede good electrical continuity; whereas, when you occasionally disconnect and reconnect, you are in effect dislodging this crud and, in a crude manner, polishing the contact surfaces.
It is the same principle as wiggling the wire on a poorly wired trailer and all the lights start working.
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