Managing tags from a mp3 with eyeD3

Removing all the tags from a mp3 file

I've been using eyeD3 to write some tags in the mp3 files from a python script. Then I had the problem to remove all the tags from a file. According to the documentation you should do something like:

tag.link("/some/file.mp3")
tag.remove()
tag.update()

but it didn't worked for me so I decided to look at the library code and I found the following solution:

tag = eyeD3.Tag()
tag.link (fileName)
frameList = []
for frame in tag.frames:
        frameList.append (frame.header.id)
for l in frameList:
        tag.frames.removeFramesByID(l)
 tag.update()

Converting an iPod podcast file into regular audio file

The iPod uses some special tags to signal the files that are podcast or audio-books and they're stored and played in a different way. I've used eyeD3 to change files I download from certain podcast and use then as regular audio files.
The first thing is to remove an undocumented tag called PCST, then the genre needs to be changed from podcast to something else. Here is the code:

tag = eyeD3.Tag()
tag.link(fileName)
tag.frames.removeFramesByID("PCST")
g = eyeD3.Genre (None, 'Radio 3')
tag.setGenre (g)
tag.update()

Converting an audio file into an iPod podcast

We only have to invert the process. The content of the PCST tag is expected to be
"00 00 00 04 00 00 00 00 00 00" (*). Here is the code:

tag = eyeD3.Tag()
tag.link (fileName)
frameHeader = eyeD3.FrameHeader()
frameHeader.id = 'PCST'
pcstValue = struct.pack ('BBBBBBBBBB', 0, 0, 0, 4, 0, 0, 0, 0, 0, 0)
f = eyeD3.createFrame(frameHeader, pcstValue, eyeD3.TagHeader())
tag.frames.addFrame(f)

g = eyeD3.Genre (None, 'Podcast')
tag.setGenre (g)
tag.update()