Again CR3 images from EOS-R5


I downloaded an CR3 image with name 023A9867.CR3 from
but using the latest snatshop 202101 I cannot generate a *.tiff image.

Using dcraw_emu.exe I get: Cannot open 023A9867.CR3: Unsupported file format or not RAW file

The problem seems to be with file_open.

It is not clear to me, what I am doing wrong.
The snapshot release documentation tells that Canon EOS-R5 camera is supported now.

Any help appreciated
Thanks in advance


I'm also unable to open this

I'm also unable to open this file using both LibRaw (and LibRaw based software) and Adobe Camera Raw.
Аre you absolutely sure that this file is not damaged?

-- Alex Tutubalin



thanks for your investigations.

Sorry, I cannot answer your question, whether the file is damaged or not.
I downloaded the image accidentally for some tests with Exiftool and I also tried to open it with libraw.

Thanks again and
Best regards


The Track1:JpgFromRaw, Quicktime:PreviewImage and Canon:ThumnailImage fields embed a correct JPEG.

What I see in this file

What I see in this file (downloaded yesterday from the link posted above):
- starting from offset 1788B23 (hex) it contains zero bytes only
- first 40% of the file looks OK.

Probably, previews are in first 40%

-- Alex Tutubalin