[ID3 Dev] ID3 tag and audio file formats

[Michal Vician]

> For those formats:
>
> - WAV has no tags
> - WMA has its own tagging format, which is specified in the wma spec,
> available in the MSDN (which unfortunately, basically does not allow Open
> Source implementations)
> - Ogg Vorbis uses "Xiph Comments" (same as later versions of FLAC and
> Speex),
> which are embedded into the Ogg container.  You can find information on
> these
> in the comment and container specs on xiph.org
> - AAC uses yet another tagging format, which does not at present have a
> published spec



Many thanks for replies.

Grrr, I can see that the "audio files metadata" situation is not very
good. I mean that there are too many specifications and if you want to
make an application which would support all of them, it might be very
confusing to user. The similar situation is in ID3 - "John Doe" users are
confused of ID3 tag versions and don't know which one to use if an
application offers/supports all ID3 versions.
First I wanted to implement ID3v2 as "widely" as possible. Now my
application supports 39 ID3v2 frames and I'm angry that I can't write it
to other audio file formats :-( What a pity...

I'm curious if there is a way to "translate" all ID3v2 frames (APIC, ...)
to "Xiph Comments" etc... If there is no way, I must only admit that my
application will never support other format than MP3.

Miso



> On Wednesday 01 March 2006 13:12, Michal Vician wrote:
>> Sorry, I've forgotten to say that I've read the following:
>>
>> -----
>> ID3.org receives one frequent question in various forms:
>>
>>     * What is the tagging format in my Windows Media File?
>>     * What is the tagging format in my iTunes file?
>>     * What is the tagging format in my ogg vorbis file?
>>
>> Answer? All audio formats can, and most probably do, use the ID3 tag
>> format. They do this because the ID3 tag standard is so wide spread and
>> implementation libraries are readily available.
>> ------
>
> This information is incorrect and should be removed from the web site.
> ID3v2
> tags will break formats which are container-based such as Ogg Vorbis and
> WMA.
>
>> - Does it mean that I can write an ID3v2 tag to formats like wma, ogg...
>> without any doubt?
>> - Can I also write ID3v1 tag into this files?
>> - Can anybody give me a list of audio file formats, where can I write
>> ID3
>> tags?
>
>> > I would like to implement support to my application also for other
>> audio
>> > file formats, not only for MP3 (eg. for wav, wma, ogg, aac ...).
>> However,
>> > I'm not sure if I can write ID3v2 tags to such kind of files in the
>> same
>> > way like in MP3. Can anybody help me with this, please?
>
> For those formats:
>
> - WAV has no tags
> - WMA has its own tagging format, which is specified in the wma spec,
> available in the MSDN (which unfortunately, basically does not allow Open
> Source implementations)
> - Ogg Vorbis uses "Xiph Comments" (same as later versions of FLAC and
> Speex),
> which are embedded into the Ogg container.  You can find information on
> these
> in the comment and container specs on xiph.org
> - AAC uses yet another tagging format, which does not at present have a
> published spec
>
> I wrote TagLib specifically for this sort of problem.  It currently
> supports
> MP3s (with ID3v1, ID3v2 or APE tags), Ogg Vorbis, FLAC (with Xiph Comments
> or
> ID3 tags), and MPC files (with APE tags).  The next version will support
> AAC
> as well.  WMA support won't happen unless someone reverse engineers the
> format.
>
> -Scott


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