Using taglib-sharp.dll to write extended properties to (video) files

[hudl]

Hi!

I try to write metadata to a mp4 file. Because this is not possible with AutoIt alone, I found the taglib-sharp.dll (Windows) that should be able to do this.

Now Im struggling on how to use it - to be honest, I really don't get this dll thing at all despite of reading for hours and days!

I tried already a lot (DllOpen, DllCall,...) but so far I thought this should be the way how to do it (which does not work obviously - well, even reading the property does not work...):

$tagFile=ObjCreate("TagLib.File")
$myFile = $tagFile.Create("F:\TEST\myMP3.mp3")

$mp3Title = $myFile.Tag.Title

If IsObj($myFile) Then
MsgBox(0,"Title", $mp3Title)
Else
MsgBox(0,"Title", "not an object")
EndIf

It fails, stating that $tagFile must be of type "Object"...?

I copied the taglib-sharp.dll into the folder of the au3 script without registering it (what I want to avoid).

If someone could point me to a direction, I'm willing to read and learn. Thanks!

[hudl]

Hmm. No one has an idea?

What am I doing wrong? Do I have to load the dll first somehow? How does the system know that I want to call the function TagLig.File.Create if I didn't load or register the dll? Are all dll's within the script dir known to the script?

I know that resolving this problem would include looking into the source of the dll (that I linked up there). So I really appreciate any help.

I just want to catch on this dll thing but currently I think I'm missing something... Thanks!

[conrelma]

I'm also interested in using taglib-sharp.dll in Autoit3.  Can anybody give me some pointers, because I get the same errors as the OP.

Any other suggestions on how to read/write MP4 tags in Autoit?

[JohnOne]

"sharp" to me implies it's a dotnet dll.

I'm fairly sure you have to register the dll, certainly if it's usage is via com method.

[water]

Maybe the >UDF to write ID3 tags to mp3 files can give you an idea.

[water]

Or do it by using atomicparsley as diescribed here.