whenever i update an mp4 file with exiftool -title="super_cool_title" filename.mp4
it always seems to write it twice.
example output...
Handler Type : Metadata
Handler Vendor ID : Apple
Title : "super_cool_title"
Encoder : Lavf58.12.100
Comment : ''
Handler Type : Metadata Tags
Title : "super_cool_title"
XMP Toolkit : Image::ExifTool 12.57
Subject : example,tags,here,dumb
Media Data Size : 7847410
any idea why?
Read the 2nd paragraph here (https://exiftool.org/TagNames/QuickTime.html), and add -G1 when reading the tags to see where they are located.
- Phil
Also FAQ #3 (https://exiftool.org/faq.html#Q3)
Example
C:\>exiftool -P -overwrite_original -Title="Super Cool" Y:\!temp\Test1.mp4
1 image files updated
C:\>exiftool -G1 -a -s -title Y:\!temp\Test1.mp4
[ItemList] Title : Super Cool
[XMP-dc] Title : Super Cool
Note that title can also show up as Keys:Title and UserData:Title. ItemList, Keys, and UserData are all subgroups of the Quicktime group.
C:\>exiftool -P -overwrite_original -Keys:Title="A different title" -UserData:Title="Yet another title" Y:\!temp\Test1.mp4
1 image files updated
C:\>exiftool -G1 -a -s -title Y:\!temp\Test1.mp4
[ItemList] Title : Super Cool
[UserData] Title : Yet another title
[Keys] Title : A different title
[XMP-dc] Title : Super Cool