[ID3 Dev] How do you know ID3 v1 without ID3v2

[Jud White]

No, frame headers would never start with ID3.

hongyang wrote:
> Thanks,
>
> I think maybe you misunderstand me, I mean whether the situation could
> happen, the MP3 music media data(not the Tag frame data) start with
> "ID3", but this "ID3" is not the ID3v2 Tag's identifier.
>
> In fact the MP3 file without ID3v2 Tags, only ID3v1 exist.
>
> do you think this situation would like happen.
>
> thank u again...
>
> Jud White 写道:
>> An ID3v2 tag can be detected with the following pattern:
>> $49 44 33 yy yy xx zz zz zz zz
>> Where yy is less than $FF, xx is the 'flags' byte and zz is less than $80.
>>
>> http://id3.org/id3v2.3.0#head-697d09c50ed7fa96fb66c6b0a9d93585e2652b0b
>>
>>
>> hongyang wrote:
>>   
>>> Hello everyone,
>>>
>>> I have a quesetion, if I know the .mp3 file has ID3v1 Tag, and I am not
>>> sure whether it also has ID3v2 Tag.Now whether the condition would happend
>>> that the start of media data are "ID3" ,but the "ID3" is not the
>>> identifier of ID3v2.
>>>
>>> My english is very poor,so please forgave me.
>>>
>>> Thank you all.
>>>
>>> hongyang
>>>
>>>
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>>>   
>>>     
>>
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>>
>>   
>

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