AW: [ID3 Dev] Purpose of Unsynchronization flag on ID3v24 tag header ?

Ben Bennett fiji at ayup.limey.net
Fri Apr 6 10:45:33 PDT 2007


On Fri, Apr 06, 2007 at 03:16:30PM +0000, Mathias Kunter wrote:
> It is safe to insert a 00 byte after every FF byte WHEN applying the
> unsync scheme. As Ben said, this may also inserts a 00 byte where
> not really nescessary, but it is easier to implement and also works
> fine because a decoder has to replace EVERY $FF $00 byte sequence.

Just to clarify what I think we are both trying to get across... 

If you are doing unsync... then you MUST insert $00 after all $FFs.
This is mandatory regarless of whether it is needed.  The only point I
was trying to make was unsync may change places that are actually
syncsafe.

			   -ben

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