RAW to JPG Conversion Question

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parrycm
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Joined: Mon Aug 28, 2017 8:44 pm

RAW to JPG Conversion Question

Postby parrycm » Mon Aug 28, 2017 8:55 pm

Hi....

Newbie so please forgive me if I'm asking an obvious question. I have a bunch of RAW (.RW2 from Panasonic Lumix) that I want to convert to JPG.

When I select one pic, and save as JPG with options set to 100% and "use estimated original quality if possible" checked and Subsampling Factor set to best - the resulting JPG is indistinguishable from the original RAW - at least when viewed in XNView. Which is what I want.

But when I use the option to Batch Process, or Convert to JPG, the results are noticeably different, it's more like the conversion process is using the default options (80% etc).

I can get the results I want by saving each pic but it's going to take a long time compared to the batch. Am I doing something wrong?

Thanks in advance
Chris

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Re: RAW to JPG Conversion Question

Postby xnview » Tue Aug 29, 2017 11:52 am

in the batch process do you have the good jpeg parameters?
Pierre.

parrycm
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Re: RAW to JPG Conversion Question

Postby parrycm » Tue Aug 29, 2017 2:14 pm

Yes - I have exactly the same parameters set.

1) in browser view I select the .RW2 pics I want to convert
2) Right click and choose batch processing - dialog box appears
3) I click on options - verify that, for JPEG Write, the quality is set to 100%, use estimated best quality is checked, sub-smapling is set to best - click on OK
4) I verify that overwrite is set to rename and check box that says "keep original date/time attributes"
5) I click on GO

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xnview
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Re: RAW to JPG Conversion Question

Postby xnview » Wed Aug 30, 2017 6:17 pm

parrycm wrote:Yes - I have exactly the same parameters set.

1) in browser view I select the .RW2 pics I want to convert
2) Right click and choose batch processing - dialog box appears
3) I click on options - verify that, for JPEG Write, the quality is set to 100%, use estimated best quality is checked, sub-smapling is set to best - click on OK
4) I verify that overwrite is set to rename and check box that says "keep original date/time attributes"
5) I click on GO

could you send me your sample files?
Pierre.

parrycm
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Joined: Mon Aug 28, 2017 8:44 pm

Re: RAW to JPG Conversion Question

Postby parrycm » Thu Aug 31, 2017 6:20 pm

Sent you a PM

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xnview
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Re: RAW to JPG Conversion Question

Postby xnview » Sun Sep 03, 2017 8:43 am

parrycm wrote:Sent you a PM

when you open the CRW2, you don't open the RAW but the embedded jpeg (1920x1440). When you convert it, by default options>Raw>High resolution is active, so the full RAW will be converted (4912x3688)
Pierre.


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