LilaHexe5d ago
I want to convert a bunch of FLAC files to OPUS, keeping the folder structure and all metadata (including the cover art). Does anyone know the best way to do that? All the finished scripts I found don't fulfill all of those requirements.

Needs to be something for Linux
Show threaddmi 💽 5d ago

@LilaHexe every time I do this I whip out a custom ffmpeg invocation… probably something like this could work (didn’t test, use with caution)

find '.' -name '*.flac' -type f -exec ffmpeg -i {} -acodec libopus -b:a 192k {}.opus \;

and then another pass to rename all .flac.opus files into .opus

Show threadLilaHexe5d ago
@domi yep that seems to work :D

hehehe uhhhhh any way to multi-thread it? 👀
Show threaddmi 💽 5d ago

@LilaHexe i would add echo before ffmpeg, and then | parallel at the end

i’m like 45% sure this will just work, you have to check, i’m not good at GNU parallel XD

Show threadΈλλεν Εμίλια Ά.ζ.5d ago
@domi @LilaHexe using `find '.' -name '*.flac' -type f -print0 | parallel -0 ffmpeg -i {} -acodec libopus -b:a 192k {}.opus`
should be more robust in regards to newlines in file names, but otherwise perform the same stuff
Show threadLilaHexe5d ago
@fogti @domi lmao, I shit you not, I got it working with something very similar about 20 seconds ago. But mine involved saving the find results to a file, cuz I couldn't figure out how to pass it to parallel. Thanks!
Show threadLilaHexe5d ago
@fogti @domi nooooo it doesn't transfer the album art ​​
Show threaddmi 💽 5d ago

@LilaHexe @fogti i tested it and it worked for me…

can you try -vcodec copy ?

Show threadLilaHexe5d ago
@domi @fogti no luck. picard shows the album art on the FLAC, but on the OPUS it needs to fetch it from the internet first :(
Show threaddmi 💽 5d ago

@LilaHexe @fogti oh, okay, mpv goofed me and i didn’t actually have it working

one moment please

Show threaddmi 💽 5d ago

@LilaHexe @fogti okay, i found the issue:

  • opus doesn’t allow for embedding album art
  • webm only allows certain formats (not a static JPG)
  • mka works if you add -vcodec copy -map 0:v:0

mka is matroska audio if you haven’t heard of it before

Show threadΈλλεν Εμίλια Ά.ζ.

@domi @LilaHexe while looking this up I came across https://superuser.com/questions/1385109/add-album-art-cover-to-an-ogg-opus-file-from-the-command-line and https://unix.stackexchange.com/questions/495382/how-do-i-embed-a-jpg-thumbnail-to-a-ogg-opus-audio-file-with-a-script/671204 (which furthermore links to https://github.com/ytdl-org/youtube-dl/pull/28894/changes)

so it doesn't look impossible, but seems to follow an not-yet universally adopted standard https://wiki.xiph.org/VorbisComment#METADATA_BLOCK_PICTURE

Add album art cover to an OGG/opus file from the command line

I managed to add an album art cover to an OGG/opus file with Kid3 - Audio Tagger but I'd like to do it via the command line on all the files of an album. I tried with ffmpeg but it did not work : $

Super User
Apr 3 at 9:57pmWeb