ID3v2:POPM tags

[inhumangeek]

I have seen that exiftool can extract ID3v2 information: http://www.exiftool.org/TagNames/ID3.html
Unfortunately that page doesn't provide any examples, and I am getting a bit stuck and confused.

What I would like to do is extract the song rating - which I believe is ID3v2_3:POPM or ID3v2_2:POP - from a whole bunch of files. I thought the command -ID3v2_3:all should show me all the entries in that group but the command line return nothing.

I have tried -a -g1 -s which gives the following:

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---- ExifTool ----
ExifToolVersion                 : 9.69
---- System ----
FileName                        : Disc 1 - 9_-_Lit_Up.m4a
Directory                       : .
FileSize                        : 4.6 MB
FileModifyDate                  : 2014:02:14 14:24:56+00:00
FileAccessDate                  : 2014:11:27 22:31:04+00:00
FileInodeChangeDate             : 2014:11:27 22:31:04+00:00
FilePermissions                 : rwxrwxrwx
---- File ----
FileType                        : MP4
MIMEType                        : video/mp4
---- QuickTime ----
MajorBrand                      : MP4 v2 [ISO 14496-14]
MinorVersion                    : 0.0.0
CompatibleBrands                : mp42, mp41, isom, iso2
MovieDataSize                   : 4696003
MovieDataOffset                 : 48
MovieHeaderVersion              : 0
CreateDate                      : 2013:05:06 07:31:54
ModifyDate                      : 2014:01:14 22:03:07
TimeScale                       : 1000
Duration                        : 0:04:53
PreferredRate                   : 1
PreferredVolume                 : 100.00%
MatrixStructure                 : 1 0 0 0 1 0 0 0 1
PreviewTime                     : 0 s
PreviewDuration                 : 0 s
PosterTime                      : 0 s
SelectionTime                   : 0 s
SelectionDuration               : 0 s
CurrentTime                     : 0 s
NextTrackID                     : 2
HandlerClass                    : Media Handler
HandlerType                     : Metadata
Album                           : Inform - Educate - Entertain
Artist                          : Public Service Broadcasting
SortArtist                      : Public Service Broadcasting
AlbumArtist                     : Public Service Broadcasting
SortAlbumArtist                 : Public Service Broadcasting
Title                           : Lit Up
ContentCreateDate               : 2013:5:6
TrackNumber                     : 9 of 11
DiskNumber                      : 1 of 0
Comment                         : rating=4
---- Track1 ----
TrackHeaderVersion              : 0
TrackCreateDate                 : 2013:05:06 07:31:54
TrackModifyDate                 : 2014:01:14 22:03:07
TrackID                         : 1
TrackDuration                   : 0:04:53
TrackLayer                      : 0
TrackVolume                     : 100.00%
MatrixStructure                 : 1 0 0 0 1 0 0 0 1
MediaHeaderVersion              : 0
MediaCreateDate                 : 2013:05:06 07:31:54
MediaModifyDate                 : 2014:01:14 22:03:07
MediaTimeScale                  : 44100
MediaDuration                   : 0:04:53
HandlerType                     : Audio Track
HandlerDescription              : SoundHandler
Balance                         : 0
AudioFormat                     : mp4a
AudioChannels                   : 2
AudioBitsPerSample              : 16
AudioSampleRate                 : 44100
---- XMP-x ----
XMPToolkit                      : GStreamer
---- XMP-dc ----
Title                           : Lit Up
Date                            : 2013:05:06
Creator                         : Public Service Broadcasting
---- Composite ----
AvgBitrate                      : 128 kbps


(note that the "rating=4" is not what I need - this is just a comment in the file)

None of these relate to ID3v2 but I know that my file contains the rating as I can see them in puddletag (see screenshot - final column) so the question is,  how do I get to this information using exiftool? I just want to extract it - I don't need to write it. Puddletag expresses the rating field as "popularimeter" and therefore I have tried exiftool '-*pop*' and exiftool '-*@*' but I still can't find it - these commands return nothing.

Any help appreciated! Thank you!

[Phil Harvey]

I have never seen ID3 tags in a M4V video.  If you send me a sample, I'll take a look.  My email is philharvey66 at gmail.com

- Phil

[inhumangeek]

Thank you very much, I will send you an email.
Note that it isn't actually a video, despite what the output shows, it's an m4a audio file.

Thanks again,
Paul

[Phil Harvey]

Hi Paul,

Thanks.

There is no ID3 information in this file.  However, there is a new QuickTime 'rate' atom that will be decoded by ExifTool 9.77:

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> exiftool -rating -G1 ~/Desktop/Disc\ 1\ -\ 7_-_ROYGBIV.m4a
[QuickTime]     Rating                          : 60

- Phil

[inhumangeek]

Thanks again for looking. I don't think the ratings I am after are in the Quicktime bit (I have a lot of other files and they might not be saved in the same way) - I'm trying to find the no@email:128 tags which can be seen in puddletag (see earlier attached screenshot) - is it possible to scan the file to find where that is stored?

Thanks.

[Phil Harvey]

The no@mail:128:0 is only in one place in this file, which is the QuickTime:Popularimeter.

- Phil

[inhumangeek]

Thank you. I am not familiar with the tool so you you confirm how to get this - is it  something like
exiftool -QuickTime:Popularimeter filename?

[Phil Harvey]

Exactly.

[inhumangeek]

Fantastic. Thanks.

[inhumangeek]

So, just as a follow-up, what is the command to search the data - i.e. to search for the @ symbol?

I found the following from http://www.exiftool.org/exiftool_pod.html#reading_examples

exiftool '-*resolution*' image.jpg
Extract all tags with names containing the word "Resolution" from an image.

But this searches the tag names rather than the tags themselves.

[Hayo Baan]

If you want to search the content of the tags, you'll have to use a tool like grep on the output of exiftool.

E.g., to search for @ in the file FILE, use the following:

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exiftool FILE | grep '@'
(This is on a Mac, on Windows, you'll need to use double quotes, and you likely have to install e.g. grep too)

Hope this helps,
Hayo