Comparing FLAC header before syncing

[Mike Garey]

Thanks for the suggestions guys, making a separate app would be much easier
than delving into the source, so I'll see if I can figure out a solution
that way.

On Wed, Dec 3, 2014 at 8:12 AM, <devzero at web.de> wrote:

> yes, i`d second that.
>
> maybe you just try using metaflac to generate the appropriate list of
> files to sync and then feed that list to rsync.
>
>
> > Gesendet: Dienstag, 02. Dezember 2014 um 08:37 Uhr
> > Von: "Fabian Cenedese" <Cenedese at indel.ch>
> > An: rsync at lists.samba.org
> > Betreff: Re: Comparing FLAC header before syncing
> >
> > At 02:24 02.12.2014, Mike Garey wrote:
> > >Hi all, I'd like to modify rsync to add a flag to compare the MD5
> signature of the unencoded audio data in the header of a FLAC file to
> determine whether or not to transfer a file. Â
> > >
> > >The reason being that I've got a large number of FLAC files, many of
> which are corrupted in the destination volume, but many of which are valid
> but the tags have been modified.  The sizes of both the source and
> destination files are the exact same, regardless of whether they're
> corrupted or not.  If I were to rsync all files based on the modification
> date, it would overwrite these valid FLAC files whose tags have been
> altered, which I want to prevent.  I only want to rsync new files and
> files whose MD5 signatures don't match.
> > >
> > >If anyone could point me in the right direction of where in the source
> code I should concentrate my efforts to add this modification, it would
> help greatly.
> >
> > You'd probably get a result faster with less problems (future updates)
> if you
> > separate your logic into a single program instead of incorporating it
> into rsync.
> > If you have a way of accessing both the source and dest then you can
> create
> > a list of files to sync and feed this to rsync with --files-from. Or you
> run your
> > script/program on the destination, check all files and create the list
> which
> > you can then transfer to the source and let rsync run. Or you have rsync
> run
> > on the destination if you have a server on or direct access to the
> source.
> >
> > If you really want to change rsync you can probably look at -c (checksum)
> > which you may be able to adjust to use the header's checksum instead
> > of generating a file's checksum. But I don't know the source code.
> >
> > bye  Fabi
> >
> >
> >
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