ExifTool Forum

ExifTool => The "exiftool" Application => Topic started by: alvin1101 on June 29, 2023, 01:48:55 AM

Title: tool trace ~
Post by: alvin1101 on June 29, 2023, 01:48:55 AM
Excuse me ... :)

Can you see the traces after exiftool modification?
Title: Re: tool trace ~
Post by: StarGeek on June 29, 2023, 01:58:01 AM
Can you clarify your question?  I don't understand what you're asking.
Title: Re: tool trace ~
Post by: alvin1101 on July 04, 2023, 01:23:50 AM
Is there any way to see that the file is modified by exiftool?

Thanks~
Title: Re: tool trace ~
Post by: StarGeek on July 04, 2023, 02:25:03 AM
That can depend.  If XMP data is edited, then exiftool will add/change the XMPToolkit to "Image::ExifTool ##.##" (where ##.## is the version number).  But that can be changed to anything with exiftool.  XMP data can appear in images directly from the camera when the camera is able to detect faces, but other than that, it usually isn't there.

Beyond that, if someone took a detailed look at how the metadata is formatted in the file and compared it to how the data was formatted in an image directly from the camera, then they might be able to see differences. Things like different padding or byte order.  But that gets into the field of digital forensics.
Title: Re: tool trace ~
Post by: alvin1101 on July 04, 2023, 04:50:47 AM

Thank you for your explanation
xmp information can be removed with exiftool,

Can the mp4 file see the traces of exiftool modification?
Title: Re: tool trace ~
Post by: StarGeek on July 04, 2023, 11:04:55 AM
Quote from: alvin1101 on July 04, 2023, 04:50:47 AMCan the mp4 file see the traces of exiftool modification?

See my second paragraph.