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

[hongyang]

good, I just want to have is this answer.

thanks.


Jud White 写道:
> 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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