ExifTool Forum

ExifTool => Bug Reports / Feature Requests => Topic started by: neebah on July 11, 2017, 01:31:12 AM

Title: JFIF 1.02 thumbnail
Post by: neebah on July 11, 2017, 01:31:12 AM
I've noticed that Exiftool doesn't notice a thumbnail for a JFIF segment if said thumbnail is present.  I'm sure this is a rare occurrence as most are probably stored in JFXX, but I found an example in the LG_KM330 sample jpg file. 
Title: Re: JFIF 1.02 thumbnail
Post by: neebah on July 16, 2017, 07:03:04 PM
Haven't heard back on this one.  No worries just hope It wasn't forgotten. 
Title: Re: JFIF 1.02 thumbnail
Post by: StarGeek on July 16, 2017, 07:27:31 PM
You'll probably have to wait for Phil to get back.  He went on vacation (https://exiftool.org/forum/index.php/topic,8409.msg43213.html#msg43213) a few days before you posted.
Title: Re: JFIF 1.02 thumbnail
Post by: Phil Harvey on July 19, 2017, 11:33:25 AM
ExifTool was only extracting self-contained embedded images (ie. JPEG format).

But I will add the ability to extract these raw-data thumbnails in TIFF format.  This will appear in ExifTool 10.60.

Thanks for the suggestion.

- Phil
Title: Re: JFIF 1.02 thumbnail
Post by: neebah on July 19, 2017, 05:59:07 PM
Awesome thanks.  There was only one sample that I noticed which did such a thing. 
Title: Re: JFIF 1.02 thumbnail
Post by: herb on July 22, 2017, 06:42:17 AM
Hello Phil, hello neebah,

I hope it is ok that I join this thread.

I know a little bit about the embedded thumbs like ThumbnailImage,  PreviewImage or JpgFrmRaw image, which are all JPG.
But I need some private lessions on this embedded Tiff image.

As far as I understood this discussion, with Exiftool 10.60 it is possible to extract it with:
exiftool.exe -b -ThumbnailTiff -W thumb.tiff <imagefile>

Is this correct? If not, what is the command to extract it?
Thanks in advance

Best regards
Herb
Title: Re: JFIF 1.02 thumbnail
Post by: Phil Harvey on July 22, 2017, 07:50:18 AM
Hi Herb,

Yes, this is the command.  However, thumbnails like this are rare, so you won't see many of them.

- Phil