[flac-dev] Looking for users of --keep-foreign-metadata

Olivier Tristan o.tristan at uvi.net
Fri Nov 4 07:30:27 UTC 2022


I'm using this features to keep specific wav/aiff chunk like the one 
that store loop information

for sampler instrument purposes.

Works fine as is.


Le 30/10/2022 à 15:06, Martijn van Beurden a écrit :
> Hi all,
> Currently I'm looking for users of the --keep-foreign-metadata feature
> of FLAC. There has been some improvement of this feature in FLAC
> 1.4.0. Since 2007 there has been a warning in FLAC that
> --keep-foreign-metadata is a new feature. I think removal of this
> warning is long overdue, but there are still some issues surrounding
> it.
> So, if there are users of this feature on the mailing list, could they
> perhaps speak up? Can this feature be considered 'complete'? Currently
> FLAC stores the top-level RIFF chunk and fmt chunk on encoding, but
> does not restore them on decoding, is this considered a problem or
> shortcoming?
> I know for example that WavPack will restore a WAVE file bit-for-bit,
> even if there is ambiguous or even invalid data stored in the format
> chunk. I don't think such behaviour is something that FLAC should
> strive for. The current behaviour of storing metadata that is not
> essential for decoding the file, for example CUE, LIST, bext chunks,
> is I think sufficient, but I would like to hear the opinion of people
> that actually use this feature.
> Kind regards,
> Martijn van Beurden
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Olivier Tristan
Research & Development

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