topic Re: Cannot view jpg's in DPP 4 in Camera Software

Cannot view jpg's in DPP 4

cdmazoff — Wed, 10 Oct 2018 17:32:58 GMT

Hi.. This is recent. I work in RAW export to TIFF, open them in photoshop CS5 and finish them as jpegs. Up until last month (September 2018) when I opened any directory with CR2, TIFF and jpgs in DPP 4. 8. 30 ALL the files had usable thumbnails. I can still open jpegs I made in August 2018 in DPP but not newer ones. I have not changed anything.

Now, the jpegs display as small thumbnails with a ? and "Unsupported Image" and will not display in preview or open to edit in DPP..

Can anyone explain this bug to me?

Re: Cannot view jpg's in DPP 4

RobertTheFat — Wed, 10 Oct 2018 21:32:46 GMT

If the JPEGs were created in DPP, then you apparently have a legitimate complaint about a bug in DPP. But as I read your workflow, those JPEGs would seem to have been created by Photoshop. If that's the case, your beef is probably with Adobe, not with Canon.

Re: Cannot view jpg's in DPP 4

cdmazoff — Thu, 11 Oct 2018 00:19:20 GMT

Thanks Bob. I hear you.. But the thing is that all the jpegs made this way since May 2018 open in DPP ... except for the last month!! Maybe it's a Windows 7 update thing. When is DPP 5 due out?

Re: Cannot view jpg's in DPP 4

cdmazoff — Fri, 12 Oct 2018 20:27:14 GMT

Solved! Someone on the retouching forum at DPR looked at my jpegs and noticed that the bad ones used progressive.. The good ones didn't... So, I resaved as baseline optimized and no problems. I wonder how that switch happened!

Re: Cannot view jpg's in DPP 4

RobertTheFat — Fri, 12 Oct 2018 21:48:04 GMT

@cdmazoff wrote:
Solved! Someone on the retouching forum at DPR looked at my jpegs and noticed that the bad ones used progressive.. The good ones didn't... So, I resaved as baseline optimized and no problems. I wonder how that switch happened!

Do the "progressive" image files violate the JPEG standard? If so, then Adobe has a problem. If not, then Canon has a problem. Or so it would seem.

If the question has no definitive answer, then is the problem a lack of precision in the JPEG standard?