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removed photos from DSLR and moved back - Canon DSLR can't recognize photos


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#1 haring

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Posted 04 February 2017 - 02:07 AM

I have removed card/RAW photos from Canon DSLR, renamed photos and without changing them moved back to card and inserted camera. Canon DSLR can't recognize photos...It can't play them. Why? Anybody can explain this? Thanks!



#2 toni-a

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Posted 04 February 2017 - 04:01 AM

well the firmware, does what it is instructed to do....

for some cameras they read the JPG files in a specific directory, others the files with specific names.

Totally normal



#3 haring

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Posted 04 February 2017 - 04:11 PM

Is there a fix?



#4 Brightcolours

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Posted 04 February 2017 - 04:52 PM

As security measure (probably against hacks) the camera apparently does a checksum check which includes the filename. If that is incorrect, the camera skips the file without displaying it.

 

Only the original file name makes it not skip it, and I can't find if the file name is stored in the file itself (I looked with a hex editor).

 

So I have no solution for you to get the camera to display these CR2 files. In future, do not rename CR2 files you want the camera to be able to display still later on ;) .



#5 haring

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Posted 04 February 2017 - 07:36 PM

Learned a lesson! :)






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