Edited files not read by Panasonic Viera tv (Bug in TV JPEG decoding)

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Since 25th of august files that I edited with Photoshop Elements 9 and saves as jpeg files to harddisk and USB stick cannot be read from the usb stick on my Panasonic Viera tv. All files from before that date can be read.
What can have happened?
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M.J.E.M. Jager

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Posted 3 years ago

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Chris Cox

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That would mean that there is a bug in your TV's JPEG reading software.
Elements 9 hasn't changed in several years.

Several TV vendors have used poor quality JPEG code in their TVs, and sometimes they'll even only read JPEGs directly from a consumer camera.
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M.J.E.M. Jager

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Thank you for your reply. But I'm sorry to say that it is very unlikely that the problem is with my TV.
As I mentioned in my first posting the tv reads all files that were edited before 25th of august. Als it is very strange that nikon raw files that I did not edit but with the editors save as option only saved as a jpeg file are being read by the tv.
Also files edited with corel paintshop are ok on the tv.
So somehow something is wrong with the photoshop editor
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Chris Cox

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No, it is almost certain that the problem is with the JPEG reading code on the TV.

We've seen this too many times before -- the TV makers take too many shortcuts with their JPEG decoding software. And Elements 9 certainly didn't change anything (in the past 4 years).
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M.J.E.M. Jager

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I'm sorry to find you so stubborn.
As i told you nikon raw files that I edited with photoshop up till 25th of august and saved as jpeg files are being read by my tv. Since 25th of august they are not being read any more.
I Think I must refrain from using adobe photoshop elements in the future as corel is working perfectly.
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Chris Cox

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Yes, and I suspect that your teachers were stubborn about the rules of mathematics as well.

Let's look at the facts:

Elements 9 has not changed in several years (Elements 13 is the current version, released last year). So Elements could not have suddenly started saving files differently.

And we know that Elements uses the same file IO code as Photoshop, and Photoshop's JPEG files are very clean, adhere to the relevant standards, and work with most other software and devices.

We know that TVs in the past have had problems with their JPEG support, and usually only correctly supported files written by a subset of digital camera (said subset sometimes corresponding to cameras made by the same manufacturer as the TV). We know that some of the TV makers have actually updated their JPEG support so that they can correctly read more JPEG files. We know that some TVs will update their firmware over network connections, often invisibly to the user.

We know that some JPEG files you are saving from Elements cannot be read by your TV. That could be due to the colorspace (CMYK vs RGB, since I don't know of any TVs supporting CMYK JPEG, and Elements doesn't do CMYK), a mistake when saving the file (saving PSD but changing the extension to JPG), or a problem with the TV JPEG software.

Nothing that we know so far points to a problem in Elements.
But several things make it highly likely that the problem is in the TV JPEG decoding software, and there a few things that might be caused by user error but don't sound like that is the case.
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M.J.E.M. Jager

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Thank you again for your reply.
What I don't understand is that all my edited files since I use photoshop elements ( i.e. since 2005) are being read by my Panasonic tv. Only those edited since 25th of august are not read. So a change in the TV software (if any) does not influence the "older" files. Isn't that unlikely?
Is it possible that I send you two files. One of a edited picture of 24th of September that can be read by my tv and one of 25th that isn't?
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Chris Cox

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A change in the TV firmware, or just a bug with certain dates - we can't know until Panasonic debugs their code and tells us what the problem is with their JPEG reader.
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Michel BRETECHER, Champion

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We also have to consider that a jpeg file stores not only image data, but also metadata. It's not impossible that the TV software can support some kind of metadata and not others. Even with the same Elements and the same TV software, that could could explain the difference. Perhaps using 'Save for web' to strip the metadata could make the jpegs readable?
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M.J.E.M. Jager

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To be sure I today reinstalled elements 9. Everything works ok except that still the jpeg files made with the editor since 25th of august cannot be read by my tv.
I now also discovered that original jpeg files from my wife's canon camera are not being read anymore by my tv when they are edited with photoshop elements 9 editor. I ad a screenshot from the manual of my TV on supported fileformats
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Chris Cox

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So it can't handle progressive JPEG, and is limited in the types of subsampling it supports. That probably means it has other hidden limitations as well.

So when saving a JPEG file, don't choose progressive. I'd expect that all JPEG quality levels in Photoshop would work, but staying at level 7 or above is probably safest.