Extensions, mods

Jeff Mitchell kde-dev at emailgoeshere.com
Tue Sep 18 14:23:53 CEST 2007

Allan Sandfeld Jensen wrote:
> On Thursday 30 August 2007 23:05, Linus Walleij wrote:
>> 2. Add abstraction for "TLEN" in ID3v2 to be
>>    written/read as and audioproperty. The idea is to
>>    let TLEN take precedence when getting playlength.
>>    Some people
>>    believe this is superfluous since the info is on the stream
>>    itself, but I think it's useful on things that are VBR and
>>    missing Xing tags, since it speeds up songlength
>>    retrieveal. (Let me know what you think, I managed to
>>    have this property added to cmdline "lame" version
>>    3.98, forthcoming so there WILL be files with TLEN
>>    tags in foreseeable future). Expose as abstract
>>    property, add to C API.
> An VBR MP3 should always have a Xing tag. MP3 should normally always be CBR, 
> making the bitrate variable is essentially a new format. The new format is 
> recognized by looking for the Xing header, without the Xing header the file 
> is not only invalid but many tools will treat it wrong (like a 
> standard-compliant CBR MP3). For more accurate file-length of CBR files, you 
> can use the INFO tag.
Is there really a problem with having both though?

Nice to see you here, Linus  :-)


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