Hello Mark,

On 2025-06-08T19:27:20+0200, Mark Filipak <markfilipak.imdb-at-gmail....@ffmpeg.org> wrote:
I want archival quality.
On 2025-06-07T21:17:03+0200, Mark Filipak <markfilipak.imdb-at-gmail....@ffmpeg.org> wrote:
ffmpeg^
  -i "c:\Ashra, Correlations [1979] chapters.txt"^
  -i c:\01.WAV^
  -i c:\02.WAV^
  -i c:\03.WAV^
  -i c:\04.WAV^
  -i c:\05.WAV^
  -i c:\06.WAV^
  -i c:\07.WAV^
  -filter_complex "[1:0][2:0][3:0][4:0][5:0][6:0][7:0]concat=n=7:v=0:a=1[out]"^
  -map_metadata 0 -map "[out]"^
  -c libmp3lame -compression_level 0^
  "c:\Ashra, Correlations [1979].mp4"
If you want to archive audio, you should use a lossless audio codec, which libmp3lame definitely isn't!

What's the origin of these 7 WAV-files and the chapter-file? Did you rip the WAV-files yourself from a CD? If so, with Exact Audio Copy (EAC) by any chance? As your intention is to archive this album to one single file, I would highly recommend you... 1) Rip the CD to one single WAV-file (if you actually have the CD). Or if your ripper supports it, skip the WAV-file and directly rip to FLAC, WV, or TAK. 2) I personally use TAK for audio archival, but please consult https://hydrogenaudio.org/index.php/topic,126205.0.html for you lossless audio format of choice. 3) Let the ripper simultaneously generate a CUE-sheet. This is the recommended way to tag the archived audio. Chapters are for video-files and the MP4-container is not meant for audio only. 4) I can't remember if Exact Audio Copy was capable of directly tagging the resulting single audio-file with the CUE-sheet, because it's been quite some years since I last used the ripper, but otherwise I'd use Mp3Tag (https://www.mp3tag.de/en/). With it you can add the CUE-sheet afterwards, or even cover-art and all sorts of tags if you want.

If you only have those 7 WAV-files, then you could use FFmpeg for concatenating and compressing (except for TAK), but the tagging I would leave to Mp3Tag.

ffmpeg -i c:\01.WAV [...] -i c:\07.WAV -filter_complex "[0:0][1:0][2:0][3:0][4:0][5:0][6:0]concat=n=7:v=0:a=1" -compression_level 12 "c:\Ashra, Correlations [1979].flac" ffmpeg -i c:\01.WAV [...] -i c:\07.WAV -filter_complex "[0:0][1:0][2:0][3:0][4:0][5:0][6:0]concat=n=7:v=0:a=1" -compression_level 12 "c:\Ashra, Correlations [1979].wv" ffmpeg -i c:\01.WAV [...] -i c:\07.WAV -filter_complex "[0:0][1:0][2:0][3:0][4:0][5:0][6:0]concat=n=7:v=0:a=1" -f wav - | Takc.exe -e -pMax -ihs - "c:\Ashra, Correlations [1979].tak"

(-map_metadata 0 is unnecessary, because WAV doesn't support tags)

--
Reino
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