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Multimedia/Discussion/General/supported maximum album art size in mp3 files/List of Posts
Forum Topic - supported maximum album art size in mp3 files: (6 Items)
   
Update
Mate Szarvas
09/15/2009 9:12 AM
post37980
supported maximum album art size in mp3 files   
While trying to extract album art from certain MP3 files
we end up having the following type of sloginfo output
and the album art fails to extract:

io-media-generic/aoi: mpega_parser: ID3TagV2.4 too big (86864bytes) pre-parsing .. 

Our question is what is the maximum permitted ID3TagV2.4 size that would
still work properly if there are no other problems?
(This limit is for the whole ID3 tag, not just the image portion of the tag, correct?)

Also, what is the meaning of "pre-parsing" in the message?

Third, is it correct understanding that each of the following 5 types of
ID3 tag specifications are fully supported: ID3v1, ID3v1.1, ID3v2.2, ID3v2.3, ID3v2.4?

Thanks,

--
Mate
Nicola Vulpe
09/15/2009 11:25 AM
post38013
Re: supported maximum album art size in mp3 files   
Mate,
The MME Developer's Guide "Metadata and Artwork" chapter may be able to help with the ID3 tags; in short, if several are
 present, we use the most recent version.
N
Angelo Pennacchioli
09/15/2009 5:33 PM
post38026
Re: supported maximum album art size in mp3 files   
Hello Mate,
The limit of 64Kbytes is set  on the whole ID3 tag.
"pre-parsing" means that the parser will load  the  ID3Tag in memory, frame by frame,  up to 64kbytes, discarding any 
frames that is > 4kbytes.

Regards,
Angelo
Adrian Boak(deleted)
09/16/2009 8:23 AM
post38044
RE: supported maximum album art size in mp3 files   
It may be worth mentioning that that 64k limit doesn't necessarily apply
to album artwork.  Album artwork can be retrieved even if it is much
larger (correct Angelo?)  

-----Original Message-----
From: Angelo Pennacchioli [mailto:community-noreply@qnx.com] 
Sent: September 15, 2009 5:34 PM
To: general-multimedia
Subject: Re: supported maximum album art size in mp3 files


Hello Mate,
The limit of 64Kbytes is set  on the whole ID3 tag.
"pre-parsing" means that the parser will load  the  ID3Tag in memory,
frame by frame,  up to 64kbytes, discarding any frames that is >
4kbytes.

Regards,
Angelo

   





_______________________________________________

General
http://community.qnx.com/sf/go/post38026
Angelo Pennacchioli
09/16/2009 9:24 AM
post38050
Re: RE: supported maximum album art size in mp3 files   
Yes, album Art  can be retreived through the "Load On Demand API",  no matter what the size of the picture frame or the 
original ID3Tag is.   During the pre- parsing phase, if the  picture frame is discarded, a reference to its size and  
location in the file is saved.
Mate Szarvas
09/16/2009 3:22 AM
post38031
Re: supported maximum album art size in mp3 files   
Nicola, Angelo: thanks for the replies; these provide sufficient information to our customer.

Nicola:  I could not see mention of the 64 kb ID3 tag limit upon a cursory review of the section on metadata.  It might 
be worth including a warning to avoid this question being repeated.  (Apologies if it's there in fact.)

--
Mate

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