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Hi a1ex,

I have been using ML for more than a year and am using dual ISO for roughly half of the photo shots.
I would like to suggest that you can add a flag to cr2hdr to force export DNG even it is not an interlaced ISO CR2 file. It will help a lot for people like me who is not using dual ISO all the time to standardise the workflow (working with DNG alone). I see your code that there is a debug routine to output the file untouched which is actually what it will do.

@ap1hk. See you got something going on mac. Why not share it?  A lot of guys out there in desperate need of a mac conversion tool
//D

I am not sure if my compilation of cr2hdr is 100% okay. 

And cr2hdr is just a small issue but to get dcraw (and maybe exiftool as well) working on Mac, one has to install either Macport or Homebrew which actually could be very troublesome. However if one was using wine already then probably they have one of these unix ports installed.

Anyway, I don't mind sharing it if anyone wants it. 

How did you compile this? I'm using gcc and getting all sorts of errors?

I downloaded the entire ML source and then go to the modules directory and compile the cr2hdr alone by "make cr2hdr".
It seems to work but I am not 100% sure. I compared with the result of wine cr2hdr.exe and didn't see much differences in the end picture so I assume this is going to work. I don't like using wine unless really necessary.

1. Try a fixed recovery ISO (not relative).

2. It looks at file number (IMG_1234) and burst is not supported. Once you know that, it's completely predictable.

3. Check if exiftool is working (post a conversion log).

Thanks.
1. Yes, autoISO with fixed recovery ISO or fixed ISO with relative ISO both okay. Just to report the combo I find not working.
2. IC. Thx.
3. I am using Mac OS and I compile cr2hdr myself. I found that the my exiftool is a perl interface to Image::ExifTool. There is no error message from stdout of cr2hdr, e.g.

Input file     : 5D3_6476.CR2
Full size      : 5920 x 3950
Active area    : 5796 x 3870
Black borders  : 124 left, 80 top
ISO pattern    : dBBd RGGB
Interpolation  : mean23-vsmooth3-contrast
ISO difference : 2.97 EV (784)
Black delta    : 2
ISO overlap    : 6.0 EV (approx)
Hot pixels     : 1055692
Output file    : 5D3_6476.DNG
    1 image files updated

For conversion log, do you mean those tmp.txt at conversion?
I will check if exiftool really work later.

Hi,

I took still photo mostly and didn't use ML before as I thought ML was for movie mostly.

I believe this update is amazing and drove me to try ML finally. So far my test did show some improvements in DR but depending on situations sometimes the difference are not very apparent.

I would also like to report some suspected bugs when using the Dual_ISO module for photo.
1. Auto ISO doesn't work well with relative setting of Recovery ISO. It will give very badly under-exposed photo (e.g. I usually set at +4EV but even setting to negative the symptom is the same.)
2. The "alternative frames only" option will fail for continuous shots and sometimes it seems just completely stop taking @ dual_ISO at all after a while.
3. The converted DNG always shows a WB of 5500K and tint=17 when I imported them into Lightroom, independent of the original WB at shot.

Regards,

Peter