Speeding up NEF raw preview?

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BTShamus
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Speeding up NEF raw preview?

Post by BTShamus » Thu Aug 14, 2008 3:20 am

I note that full and half size renders take several seconds to show a new image.

Is there a way to:

(a) show the jpeg preview first, then render from RAW and overlay.
(b) speed up the RAW decode using a 2nd thread or Core. I notice that XNView only uses 25% of my Quadcore. Meaning it could go much faster if it was 2 threaded.



camera : d300 12/14 bit lossless compressed.
cache: running on a software striped RAID0

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xnview
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Re: Speeding up NEF raw preview?

Post by xnview » Thu Aug 14, 2008 8:14 am

Currently not possible, but a good idea
Pierre.

BTShamus
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Re: Speeding up NEF raw preview?

Post by BTShamus » Sat May 16, 2009 8:40 pm

I don't understand why XnView is unable to show the embedded JPG while rendering the HQ image in the background? Both EXIFTOOL and Preview Extractor http://drchung.new21.net/previewextractor/ can do this with ease. In addition Preview Extractor is multi-threaded!

obelisk
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Re: Speeding up NEF raw preview?

Post by obelisk » Sun May 17, 2009 10:53 pm

I have my already set to show the embedded JPG ONLY, and it takes 2-3s
Chances are your setting is also set to show the embedded JPG already for raws.

Eric B
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Re: Speeding up NEF raw preview?

Post by Eric B » Tue May 19, 2009 9:03 pm

in Xnview, you have 2 settings in option to set "Camera RAW" to "embedeed thumbnail":
browser/preview
view/misc.

Anyway, for RAW viewing, I prefer FastStone than Xnview, but Xnview stays my main picture viewer for everything else (mainly jpg)

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xnview
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Re: Speeding up NEF raw preview?

Post by xnview » Wed May 20, 2009 6:22 am

Eric B wrote:Anyway, for RAW viewing, I prefer FastStone than Xnview
Why? :?
Pierre.

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Re: Speeding up NEF raw preview?

Post by Eric B » Wed May 20, 2009 11:28 pm

simply because fastone is (much more) faster to load the jpg embedeed in raw file than Xnview (Xnview needs about 1 sec), whereas Xnview seems to be faster to load full resolution jpg...

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xnview
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Re: Speeding up NEF raw preview?

Post by xnview » Mon May 25, 2009 7:50 am

Eric B wrote:simply because fastone is (much more) faster to load the jpg embedeed in raw file than Xnview (Xnview needs about 1 sec), whereas Xnview seems to be faster to load full resolution jpg...
Strange, could you send me a raw sample?
Pierre.

obelisk
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Re: Speeding up NEF raw preview?

Post by obelisk » Mon May 25, 2009 10:54 pm

I find previews fine, as it loads in a separate thread.
Full view is very slow

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