Verarbeitung #272

Convert all files to flac?

Added by Alexander Blum over 4 years ago. Updated about 2 years ago.

Status:FeedbackStart date:
Priority:NiedrigDue date:
Assignee:-% Done:

0%

Category:-Estimated time:1.00 h
Target version:Repertoire 4) Production phase I

Description

Shouldn't we convert all incoming uploads to flac before archiving?
Is flac capable of >2 channels?

History

#1 Updated by Thomas Mielke over 4 years ago

  • Assignee changed from Thomas Mielke to Alexander Blum

Yes it is capable to host mulitchannel audio.

There is a flac encoder option: --keep-foreign-metadata

"If encoding, save WAVE, Wave64, RF64, or AIFF non-audio chunks in FLAC metadata. If decoding, restore any saved non-audio chunks from FLAC metadata when writing the decoded file. Foreign metadata cannot be transcoded, e.g. WAVE chunks saved in a FLAC file cannot be restored when decoding to AIFF. Input and output must be regular files (not stdin or stdout)."

So AIFF should be excluded, if we decide to do this -- at least do a test-decode and compare it binary to the original, when in doubt.

This seems to be much more demanding in terms of computing power than preview creation. So this should be a second consideration.

#2 Updated by Alexander Blum over 4 years ago

  • Assignee changed from Alexander Blum to Thomas Mielke

The currently allowed file formats are:

  • Wav [.wav, .wave]
  • Au [.au, .snd]
  • Flac [.flac]
  • Monkeys Audio [.ape]

Aiff is excluded right now anyways, because there's no strict policy for the file extension:

https://en.wikipedia.org/wiki/Audio_Interchange_File_Format:

"For the compressed variants it is supposed to be .aifc, but .aiff or .aif are accepted as well by audio applications supporting the format."

Concerning the computing power: we should provide an estimate and include Frank for the decision.

#3 Updated by Thomas Mielke almost 4 years ago

  • Assignee deleted (Thomas Mielke)
  • Priority changed from Normal to Niedrig

#4 Updated by Alexander Blum about 2 years ago

  • Target version changed from 4) Production phase I to Repertoire 4) Production phase I

#5 Updated by Alexander Blum about 2 years ago

  • Project changed from repertoire to collecting_society

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