[Flac] While I'm Thinking About metaflac...

[Brad Leblanc]

Thanks Graue.  That makes sense.

Like I said - it's not causing a problem, I was just curious what it was
doing.

-Brad

On 4/15/07, Graue <graue at oceanbase.org> wrote:
>
> "Brad Leblanc" <brad.leblanc at gmail.com> wrote:
>
> > While I'm playing around with it, I'd like to ask about something I've
> > noticed.
> >
> > Sometimes when I use metaflac to add tags, it performs it's operation
> > instantly in a split second.  Other times the same command causes lot of
> HDD
> > I/O's and I can see it create a "filename.flac.metadata_edit" temp file.
> > For example - I just added tags to a 25MB file and it took 15 seconds to
> > process the command.
>
> The tags are stored at the beginning of the file.
> Since it's not possible to add new data into the
> beginning or middle of a file, adding tags
> normally means having to copy all the audio data
> that comes afterwards.
>
> The reason this is sometimes fast is that FLAC
> adds a padding block with unused space after the
> tags. As long as your new tags fit in the padding
> block, nothing has to be copied.
>
> If this is a frequent problem for you, look at the
> documentation for FLAC's --padding option. Setting
> a larger padding size might help.
>
> Regards,
> Graue
>



-- 
Brad
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