[ID3 Dev] Info Sought

[Andy Kernahan]

Kirk,

    the answer to your other question is 7F 7F 7F 7F for a maximum value 
sync-safe integer. As the for the comment frame it has the following 
structure:

text encoding ID (1byte),
language ID (3bytes (3 ASCII chars)),
description (null terminated (\0)),
body of text.

Below is an example of the structure:

\0engThis is the null terminated description\0This is the rest of the body 
of the frame

There are a few other frames that use null terminated strings - APIC, POPM 
and the GEOB frames spring to mind.
Tom is right thought, if you are only going to be using Winamp to play your 
music then you need only code around the v2.3.0 std as later versions of ID3 
are not supported by Winamp.

Hope this helps,

Andy.

----- Original Message ----- 
From: "Tom Sorensen" <tsorensen at gmail.com>
To: <id3v2 at id3.org>
Sent: Thursday, October 27, 2005 2:16 PM
Subject: Re: [ID3 Dev] Info Sought


Again, do not use ID3v2.4 if you want Winamp to read the results.
Winamp will not read any v2.4 tags. You need to use
http://www.id3.org/id3v2.3.0.html as your reference instead.

As for VB libraries, I do not know VB, but if you Google for "vb id3"
there seems to be a good number of hits, including this:
http://www.pstruh.cz/tips/detpg_change-id3-tags-script/

I can answer at least one of your questions...

> The next byte is (always?) a zero and the actual information starts
> after that.

No, that byte is part of the frame data (you must include it in frame
length!), is only present for text field data, and indicates if the
data is Unicode or not. The reference to it in the ID3v2.3 docs is
rather buried though, so here it is:

"Frames that allow different types of text encoding have a text
encoding description byte directly after the frame size. If ISO-8859-1
is used this byte should be $00, if Unicode is used it should be $01."

Note that for ID3v2.3 "Unicode" means UTF-16. v2.4 is more flexible,
but, again, I recommend against using it if you want to use Winamp.

---------------------------------------------------------------------
To unsubscribe, e-mail: id3v2-unsubscribe at id3.org
For additional commands, e-mail: id3v2-help at id3.org




---------------------------------------------------------------------
To unsubscribe, e-mail: id3v2-unsubscribe at id3.org
For additional commands, e-mail: id3v2-help at id3.org