[ID3 Dev] going past 256 char limit in comment field in iTunes

Peter Bennett pgbennett at comcast.net
Sat Jan 10 15:38:16 PST 2009


The ID3 format is only used with mp3 audio files. mov files will use 
some other format for tags. The ID3 v2.3 and 2.4 do not set any limit to 
the length of a comment tag in an mp3 file (you can make it as long as 
you want).

If quicktime limits the length of comment text in mp3 music files then 
that is a limit of quicktime itself, not of the ID3 standard

Peter

Samuel Lago wrote:
> I make a lot of home videos in the .mov format, thye all have a story
> attached to them. I would like to use iTunes (on the Mac) to store those
> videos and tag them inside iTunes, however there is the problem of the ID3
> 256 char limit, my stories go well beyond that. Originally I was unsure of
> the reason for the limit as QuickTime Pro will embed as much metadata into
> the comment field as you like, however when importing the same video file
> into iTunes only the first 256 chars were viewable.
>
> I need to get past this limit, this I can do with QT Pro but I would like to
> have iTunes as my solution to storing and viewing both music and videos. I
> could tag everything with QT Pro but that would be the 'wrong' kind of
> workflow for me. So what of this v4 revision to the ID3 standard, I read
> that the comment field jumped form 128bit to 256 from v1 to v2, can I expect
> more leniency in the v4 spec?
>
> Also, can anybody tell me what then QT uses to store the comment data in?
>
> Thanks.
>
> Samuel (E)
> sɐɯnǝl (ǝ)
>   


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