Author Topic: Canon mRAW Support  (Read 1634 times)

Jan Shim

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Canon mRAW Support
« on: December 28, 2017, 04:09:02 am »
I am well aware that DxO OpticsPro  does not support Canon's mRAW and sRAW files. So when Photo Lab was launched I was hopeful that the smaller raw files would be supported but no. I don't know how involved it is to engineer support for the smaller RAW files are but I'm hoping some day (sooner rather than later) I see support for mRAW — even with Canon's own raw editor, mRAW works so much faster than full raw so by that logic the same performance benefits can be seen in DxO.
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Sigi

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Re: Canon mRAW Support
« Reply #1 on: December 28, 2017, 09:32:37 am »
Jan Shim - out of curiosity - why would you use mRaw or sRaw? Isn't the whole point of shooting in Raw that you get as much data as possible. We spend lots of money on lenses etc... and then voluntarily give up on the benefits.

Jan Shim

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Re: Canon mRAW Support
« Reply #2 on: December 29, 2017, 11:44:57 pm »
When it makes sense such as when you're post processing up to 4,000 images and the client only wants 4R prints with the largest ever requested a Super 8R. By switching to mRAW (I don't use sRAW) we (a team of 3 photographers) get more images recorded in a single CF card from our Mark III bodies (average of 2 CFs per person) along with much quicker delivery time. Even with my a Core i7-3770K CPU, 16GB* overclocked RAM, SSD ... this number of images can slow the computer to a crawl.

The most painful part was not knowing that DxO didn't support smaller RAW files years back and I got burned bad having had everyone shoot mRAW for one event — forced to batch with Canon DPP instead or was it Lightroom I can't remember.

When I am shooting low volume commercial work, full RAW is without question the preference.

*I've read from another post that someone tested DxO with 32GB RAM and DxO was reported to run better although the number of 'simultaneous processed images' settings saw no benefit when increased beyond 4.
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Bencsi

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Re: Canon mRAW Support
« Reply #3 on: December 30, 2017, 03:23:35 pm »
Hi Jan,

This is not an excuse, just let you know.

 DxO originally targeted this RAW converter software for quality delicious photographers. That is why, among others not supporting the low quality point&shot cameras, low resolution lenses, most of mobile phones, scanners, etc. The sRAW, mRAW, CRw, nRW, etc. formats are all compressed. Mostly the internal compression algorithm in the camera treat 4 pixel as one. It just calculate the average value of the 4 pixel content. Such degradation in quality prevent to reproduce the best resolution.

If you want to use DoP or PL as RAW converter anyhow, reduce the pixel resolution in your camera and record the image in non-compressed RAW format. The result is almost same for you, because restore the original resolution from a quarter of the data is always a guess work. The file size will be ~ quarter also. There is also a solution to reduce the frame to DX instead of FX. It saves ~50% of the image file size. The resolution will be less, but not the quarter. These parameters are adjustable on the camera, in advance to start of the series.

Endre
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Jan Shim

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Re: Canon mRAW Support
« Reply #4 on: January 02, 2018, 03:04:01 pm »
Thanks for the explanation. All nice except that you cannot use full RAW in a Canon EOS Mark II or Mark III body and select a lower resolution. You have to choose either mRAW or sRAW.

RAW:    22MP 5760x3840
mRAW: 10MP 3960x2640
sRAW:  5.5MP 2880x1920
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Bencsi

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Re: Canon mRAW Support
« Reply #5 on: January 02, 2018, 08:17:13 pm »
Unfortunately, you are right. In the EOS-5 series has neither DX crop nor side rate exchange function. Sorry. On the Nikon models these are available.

Endre
Win7/64 PC, i7-3770, 3.9GHz, 24G RAM, Intel HD-4000 GPU, 27" calibrated LG monitor 1920*1080 px res. 82 DPI

 

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