Gui fails to list mp3 files with two or more artists

[Wilollow]

This issue has been described in other issues already, but the cause was not completely clear, so i thought it wise to open a specific issue. The problem is that certain music files are not recognised upon loading a certain directory. HoreaM suggested this might be due to those files having multiple artists listed in the metadata. I can confirm that this is the case, as there is an overwhelming correlation between the two.

some suggestions:

• Use only the first artist in the metadata
• Use the album artist instead
• Allow the 'artist' field to be populated by an array of artists, joining them into a string when neccesary

[tranxuanthang]

I think I can reproduce this, actually there are some songs from my library having this issue.

this might be due to those files having multiple artists listed in the metadata

You are right, but this might be a little bit more complicated. I haven't look but I bet the difference between ID3v2.3 and ID3v2.4 is involved. From what I know, ID3v2.3 doesn't support multiple values, while ID3v2.4 supports multiple values separated by a NULL byte (multiple artists for example).

Not entirely related but this is a similar problem I faced in the past: polyfloyd/rust-id3#103