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Problem with embeded album art of mp3　and　ogg

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saratoga:

--- Quote from: maz-1 on April 15, 2013, 11:30:02 AM ---'Rockbox does not support RLE-compressed BMP files, nor does it support progressive and multi-scan JPEG files.'
this is grabbed from the link provided above,is this for both embeded album arts and individual ones?

--- End quote ---

Yes, the same JPEG limitations apply to all files; like the manual says JPEG variants that would need more memory than is available are not supported. 

maz-1:
Does embeded album arts in idv3 have more limits than individual album arts when stored as jpeg?(don't quite understand what　'unsynchronized'　means)

saratoga:

--- Quote from: maz-1 on April 15, 2013, 11:52:02 AM ---Does embeded album arts in idv3 have more limits than individual album arts when stored as jpeg?(don't quite understand what　'unsynchronized'　means)

--- End quote ---

unsynchronized refers to a type of ID3V2 tag.  JPEG has no additional limits, but if you use a type of tag we can't read, the JPEG file won't be parsed. 

FWIW, unless you're a developer, there should be no reason for you to care about how JPEG or ID3v2 work.  Just use normal JPEG files with any sane tag writing software and everything will work.  You'll only run into problems if you try to force weird JPEG features that no one ever uses.  Don't do that. 

maz-1:
well,i don't know if i explained my question clearly enough.You have just said that if individual  album arts in jpeg format work fine in rockbox then they should work fine when embeded into idv3 with proper tools,right?the problem is that optimized baseline jpeg album arts can be displayed when stored as  individual files,but when these pictures are embeded into mp3, they don't work.And the same problem doesn't happen on standard baseline jpeg files or continuous jpeg files(i did several tests ,kept other conditions the same).So the only explaination is that embeded album arts have more unexpected limits than individual album arts.I'm not sure if foobar2000 can be seen as a proper tool for tag writing.

saratoga:
I don't know what optimized baseline jpeg is, I don't think thats an official JPEG term.  I can look at one of the MP3s that doesn't show album art though if you post a link.

Edit:  Google says the "optimized baseline" feature is just normal baseline produced by Photoshop, so I don't see why it would be any different. 

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