extract thumbnail from RAF file?

[dpawson]

From another question Phil suggests

>exiftool -b -jpgfromraw JDP01214.RAF >tn.jpg

Tried eog tn.jpg and  it reports Error interpreting image file(Not a JPEG file; starts with 0x43 0x6f)
  Is this a Fuji issue please?

[Phil Harvey]

Can you send me the RAF image so I can take a look?  (philharvey66 at gmail.com)

- Phil

[dpawson]

Sent, via google link due size.

[Phil Harvey]

Here are the embedded previews you have available:

Code Select Expand

> exiftool JDP01214.RAF -preview:all -s
PreviewImage                   : (Binary data 914562 bytes, use -b option to extract)
ThumbnailImage                 : (Binary data 8360 bytes, use -b option to extract)

So I can't see why your tn.jpg would start with 0x43 0x6f -- it should be empty because JpgFromRaw doesn't exist.

- Phil

[dpawson]

Seems it is not the viewer I'm using (eog).
Using
>convert -scale 800x600 JDP01214.RAF  tn.jpg
eog shows the image no problem.

>  exiftool JDP01214.RAF -previewimage  -b >tn.jpg
Has the same issue, as does -bigimage

[Phil Harvey]

>  exiftool JDP01214.RAF -previewimage  -b >tn.jpg
Has the same issue

This command produces a perfectly good JPEG image.

- Phil

[dpawson]

Tried with the Gimp, same 'error' reported.
With what are you viewing the jpg please Phil?

[StarGeek]

Are you on Windows?  If so, are you using PowerShell?

If so, switch to CMD.  PowerShell is known to corrupt binary data that is piped or shell redirected.

[dpawson]

OS is Linux Fedora 32, 64 bit.
exiftool 12.01
----------
Nominal differences
>  exiftool JDP01214.RAF  -preview:all -s
Config file LOADED!
PreviewImage                    : (Binary data 914562 bytes, use -b option to extract)
ThumbnailImage                  : (Binary data 8360 bytes, use -b option to extract)
BigImage                        : (Binary data 914562 bytes, use -b option to extract)
/data/files/photos/exiftest 10:28 >  exiftool JDP01214.RAF  -thumbnailimage -b >tn.jpg
/data/files/photos/exiftest 10:28 >  ls -al tn.jpg
-rw-r--r-- 1 dpawson dpawson 8380 Jul 11 10:28 tn.jpg

note tn.jpg is 20 bytes larger than 'predicted' by exiftool?

[Phil Harvey]

Config file LOADED!

There is your 20 bytes.

- Phil

[dpawson]

Oh dear, finger trouble again.
  Sorry to waste bandwidth Phil

Thanks for the help.

[StarGeek]

Heh, that explains it.  From the Gimp error I looked up the Character values of the Hex it displayed and it was Co, which confused the heck outta me.