Save RAW files in DNG format instead of RAW

ewavr

fudgey
If I understood ewavr correctly, he knows how to replace one of these extensions by DNG, but that will make you unable to download files that have the replaced extension.

Yes, this is correct. I like to shoot DNG files with DNG extension, CHDK RAW files with CRW extension.
But maybe at least for A710 this problem is solved - we lose both THM and DPS (what is it?) extensions and obtain DNG (see screenshot).

lrossel

Now I realized that my comment about how tu use Windows Explorer to show the content of the camera trough the USB was really stupid. 😳

Sorry all you guys if I confused somebody with my comments.

Too much brain use trying to add the dng mods to the 578 trunk... : :'(

hotvedt

ewavr
Yes, this is correct. I like to shoot DNG files with DNG extension, CHDK RAW files with CRW extension.
But maybe at least for A710 this problem is solved - we lose both THM and DPS (what is it?) extensions and obtain DNG (see screenshot).

Yes, this is how i want it to work. THM i think is a small jpeg that often comes with avi's to be used as thumbnails. The dps i have no idea what is.
So for me, it would have been nice to be able to access jpg, avi, crw and dng via camera usb.

lrossel

Well, finally I applied the dng-r585.diff to the 587 build.

I compiled for my A720IS and it works fine.

As Whim suggested I did it by hand, took me some time, but was a good introduction to understand how the code works.

Now I have to go back 23 years ago and remember how to program in c...

reyalp

If using windows, I'd suggest using tortoise -> apply patch instead of doing it manually.

fe50

Short info for the .dps files:

It's for the PictBridge standard,

In PictBridge, USB is used as a physical layer, and PTP is used as the transport layer protocol. The newly defined DPS layer is located between PTP and the DPS application layer. The DPS layer translates DPS operations and events into PTP operations and events, and vice versa. PictBridge defines the interface between the DPS layer and the DPS application layer. PictBridge does not make any changes or additions to the standard transport layer and below.

(from http://www.canon.com.au/about/press_room/story_830.html - "PictBridge CIPA White paper - Digital Photo Solutions for Imaging..." aka Canon dps whitepaper)

PS: have a look to the strings in a dump of a PictBridge supported camera...

ewavr

So, DNG support now in trunk for all cameras, except:
- g9 (DNG for g9?)
- a590, ixus50(sd400), ixus75(sd750) - because DNG4PS2 don't support them
- ixus40(sd300) - due to mismatch in RAW size between CHDK and DNG4PS2 (what RAW size is correct?)

Changes from previous beta: only cosmetic (language strings, error message "missing badpixel.bin").

P.S. My compilation time for all 71 supported firmware version now is 47 minutes (without signatures search, WinXP, Athlon 64X2 5400+) 🙁.

binsurf

The build number in the main downloads (CHDK Download - build 0.8.1, revision #589) hasn't updated, am I missing something?

ewavr

binsurf
The build number in the main downloads (CHDK Download - build 0.8.1, revision #589) hasn't updated, am I missing something?

We need compilation log. On my computer CHDK for all files compiles successfully.

binsurf

No, I mean if you click on the build number (which is still 589), it shows all the build changes from 590 to 591, but the file downloads are still 589. The changes don't seem to be available for download. There are no 591 build files.

Hacki

Oopsie. Disabled the cronjob earlier that day because i was testing something.

Should be done in about 20 minutes. (Was testing be build time on the server - takes 18 minutes with gcc4. AMD Opteron 1212 HE dual core @ 2 Ghz)

binsurf

So I take it there is still no support for saving the files as .DNG? When I turn on DNG, my raw files still save as CRW/CR2.

whim

I just tried it, renamed CRW to DNG, and it loads fine in IrfanView.
Since Irfan refuses to load the same file as CRW ('bad header or unknown format'),
and the color balance looks fine on my A620, so i suppose it works OK.
It's quite fast too, didn't 'feel' a difference with 'normal' RAW.
Great work, ewavr !

wim

PS It would be great if the 'RAW XXX' in OSD would change to 'DNG xxx' when DNG activated

binsurf

Right, that works for me too, I just mean, that CHDK doesn't save the DNG files with the .dng extension, it's still .crw or .cr2.

quietschi

tested new build on my ixus70 and it works fine, also crw saving time is very fast with option raw buffer save enable.
one thing i found out on my cam is that the image size is different between CHDK Raw and DNG Raw
jpg = 3072x2304 = 7077888
crw = 3112x2328 = 7244736
dng = 3108x2324 = 7222992

Image is saved as CRW_XXXX.CRW not as *.DNG so i have to rename the file to *.DNG right?
loading *.CRW to Irfanview works

One other thing - the Thumbnail image in the dng seems to have false colors or wrong white balance? it looks purple

after all i think this is a big step forward - big thanks to ewavr, MartinBudden and all the other great devs

cheers quietschi

ewavr

quietschi
one thing i found out on my cam is that the image size is different between CHDK Raw and DNG Raw
jpg = 3072x2304 = 7077888
crw = 3112x2328 = 7244736
dng = 3108x2324 = 7222992

Yes, but DNG contains all pixels from CHDK RAW.

Image is saved as CRW_XXXX.CRW not as *.DNG so i have to rename the file to *.DNG right?

Yes.

One other thing - the Thumbnail image in the dng seems to have false colors or wrong white balance? it looks purple

Maybe, because I calibrated thumbnail colors only for my camera. If image if overexposed, it may look pink.

laetilodie

Is it normal that DNG doesn't work with S2is camera ?

In firmware CHDK-s2is-100g-0.8.1 i have dng option but it isn't possible to activate it and i have RAW buffer cached option
In firmware s2is-100g-0.8.2-591-full i have dng option and i can activate it but i doesn't work and the RAW buffer cached isn't there.

lrossel

laetilodie
Is it normal that DNG doesn't work with S2is camera ?

In firmware CHDK-s2is-100g-0.8.1 i have dng option but it isn't possible to activate it and i have RAW buffer cached option
In firmware s2is-100g-0.8.2-591-full i have dng option and i can activate it but i doesn't work and the RAW buffer cached isn't there.

Don't forget to store the badpixel.bin file in the CHDK folder.

lrossel

Ewavr, I worked to make a User Manual to store in the memory card of the camera, in order to be used like a guide for the users of CHDK.

One issue not well described yet is the DNG support of the new builds.

https://chdk.setepontos.com/d/1214/33

Can you help to complete this part?

laetilodie

lrossel

laetilodie
Is it normal that DNG doesn't work with S2is camera ?

In firmware CHDK-s2is-100g-0.8.1 i have dng option but it isn't possible to activate it and i have RAW buffer cached option
In firmware s2is-100g-0.8.2-591-full i have dng option and i can activate it but i doesn't work and the RAW buffer cached isn't there.

Don't forget to store the badpixel.bin file in the CHDK folder.

YES with a badpixel.bin ( post 42 ) the firmware CHDK-s2is-100g-0.8.1 work with the DNG option but not the 0.8.2

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