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• Convert WAV to FLAC or ALAC whilst preserving/converting id3 tags [closed]

  28 mars 2023, par Jai_1008

  Basically I want to render my mastered audio out of Wavelab, (the industry standard for mastering music) and then be able to have my track added to the macOS Music app with all metadata already included.

  


  It's more complicated than this, but basically Wavelab only gives serious metadata options to its WAV output. If I render out as FLAC, which, as a format, has better metadata implementation than WAV files, the metadata options I have avialable in Wavelab are not as good/extensive.

  


  So to get the metadata I want, I have to render as WAV. But then I can't put that in Apple Music app whilst keeping it's id3 tags. All the fields like Artist etc are blank in the Music app.

  


  The Music app DOES recognise the metadata from an ALAC file. So I have to convert a WAV to ALAC (or FLAC as converting FLAC to ALAC is easy) whilst somehow preserving its metadata. And for the life of me, I cannot find an answer to this from searching and reading everything.

  


  Any help ? I was looking into ffmpeg as an option, but no one speaks to this specific situation of mine. Converting WAV to FLAC or ALAC and preserving the WAVs metadata (id3 tags).

  


  I've tried using -map_metadata 0 when converting a WAV to FLAC in ffmpeg, but ffmpeg says it's ignoring ID3 tags because it found more suitable metadata. But the resulting FLAC only has Artist and copyright fields included in its metadata.

  


• lavfi/vf_libplacebo : generalize frame update to multiple inputs

  15 juin 2023, par Niklas Haas

  lavfi/vf_libplacebo : generalize frame update to multiple inputs
  In the event that some frame mixes are OK while others are not, the
  
  priority goes :
  1. Errors in updating any frame -> return error
  
  2. Any input incomplete -> request frames and return
  
  3. Any inputs OK -> ignore EOF streams and render remaining inputs
  
  4. No inputs OK -> set output to most recent status
  This logic ensures that we can continue rendering the remaining streams,
  
  no matter which streams reach their end of life, until we have no
  
  streams left at which point we forward the last EOF.
  

  • [DH] libavfilter/vf_libplacebo.c

• How to ask FFMPEG to trim a video from start up to the end where there are no changes in frames ? [closed]

  27 août 2023, par jtrner

  I got a copy of our training module videos but these are desktop screen recorded. There are some videos where it supposed to end up to the length of the video, say 00:45:00, but because the "screen recorder" was not stopped (probably the person recording it left the computer) so there are added static frames towards the end (like 5 to 30 mins) and making the videos longer and file sizes bigger than it should be. So instead to end at 00:45:00, the video end timestap would be like say, 00:59:00.

  


  So how would I ask ffmpeg to "trim" the videos up to the part where the frames stopped and no changes at all ? And I also like to have a buffer of like 10 seconds after the supposedly end of the video, just to make sure that ffmpeg correctly detects the segments where the frames stopped.

  


  I'm only familiar with the video timming but don't have any idea on what filter to use to detect frame changes on videos using ffmpeg.