Update a song metadata with taglib-sharp and Powershell

问题

I am trying to update a song metadata with taglib-sharp and powershell. It works fine for most of the files but there are errors on some wma files (I can play these files though).

# Load the tag-lib assembly
[Reflection.Assembly]::LoadFrom( (Resolve-Path ("D:\zic\lib\taglib-sharp.dll")))

# Load up the song file and its metadata
$path_file="‪D:\zic\misc\Artist_Title.wma"
$song = [TagLib.File]::Create((resolve-path $path_file))
$file_name = [System.IO.Path]::GetFileNameWithoutExtension($path_file) 
$file_name_array=$file_name.Split("_")
$artist=$file_name_array[0]
$title=$file_name_array[1]

#set the artist and title (metadata)
$song.Tag.Artists = $artist 
$song.Tag.AlbumArtists = $artist 
$song.Tag.Title = $title

# Save the metadata 
$song.Save()

The error appears when the file is saved:

Is it a powershell problem? A taglib-sharp problem? I am using taglib_sharp version 2.0.50727 and powershell version 5.1.16299.248.

EDIT

With a try catch to show the error:

# Save the metadata
try
{
    $song.Save() 
}
catch [Exception]
{
    Write-Host $_.Exception|format-list -force
}

The console displays:

EDIT 2

If I edit the tags manually (right click on the file -> properties) or rename the file, the program runs without problem and the tags are updated. Weird!

回答1:

As @tukan suggested, the length of some tags was the problem.

Let's display all the tags of a song:

$song = [TagLib.File]::Create((resolve-path $path_file))
foreach ($tag in $song.Tag)
{
    Write-Host "tag:" $tag
}

The output:

tag:
tag: {D1607DBC-E323-4BE2-86A1-48A42A28441E}
tag: 10.00.00.3802
tag: 0.0.0.0000
tag: 0
tag: 2007
tag: 128317523430000000
tag: AMGa_id=R  1411185;AMGp_id=VA;AMGt_id=T 14593744
tag: Éri Tabuhci
tag: Universal
tag: World
tag: Les 100 Plus Grands Tubes Disc 3
tag: Unknown Artist
tag: 14+96+34B7+ADE8+E42D+11DF5+15230+196F2+1C2D1+1FC01+257E9+29612+2D100+30FB0+34ECE+3923F+3D39B+40CF6+454FF+49162+4D5D0+521B0
tag: AMG
tag: World
tag: 5

The fourth tag from the end is too long and is the cause of the problem. The solution is to load the file, remove all the existing tags, save it, load it again and then set the tags you want. For example:

$song = [TagLib.File]::Create((resolve-path $path_file))
$song.RemoveTags($song.TagTypes)
$song.Save()

$song = [TagLib.File]::Create((resolve-path $path_file))
$song.Tag.Artists = "blabla"
...

Hope this helps!

回答2:

My guess based on the source code is that you reached a ByteVector size (probably file size or some list) limit which is 2,147,483,647 - int overflow.

If the filesize of the .wma files or list is greater than 2,147,483,647 byte(s) you will get to the negative numbers (overflow) and thus getting this exception.

You have to open a ticket on github with this project and they should use the long type there which has limit 9,223,372,036,854,775,807.

When you edit manually you don't get to this limit so it works.

来源：https://stackoverflow.com/questions/48906243/update-a-song-metadata-with-taglib-sharp-and-powershell

标签

powershell

metadata

taglib-sharp