Downloads track as opus instead m4a

[ZenKyma]

Is there an existing issue for this?

• I have searched the existing issues

Pain

Currently tracks are being downloaded as m4a, while opus is youtube's standard audio format.
Comparing to m4a, opus is much more advanced and offers better quality at lower bitrate when compared to m4a, ogg vorbis and mp3. See this comparison:

Spotube downloads audio as m4a at around 128kbit but youtube offers opus files up until 152kbit. Here an overview in jdownloader:

Suggested solution

It would be awesome if spotube would download opus files at max kbit.
I recommend this as a standard setting instead of m4a. Opus offers better quality audio files with a much lower filesize than mp3 and is increasingly becoming the new standard for lossy audio.

Useful resources

No response

Additional information

Awesome project! Just got the linux flatpak version and enjoying it a lot.

[KRTirtho]

The opus is actually .webm stream so it'll require ffmpeg to convert that to opus

[KRTirtho]

~66MB binary size increase on multiple platforms (except linux) 😅

[ZenKyma]

The WebM container likely contains the opus file as is, which should be extractable without ffmpeg. See this post:

https://stackoverflow.com/questions/65511370/webm-vs-opus-quality-youtube-dl-context

I couldn't find out yet if spotube is using youtube-dl or a fork of it to get the downloads, in which case one could extract the opus file easily like so:
youtube-dl -f bestaudio --extract-audio --add-metadata [yt-link]

[ZenKyma]

Can be apparently also extracted with mkvextract from mkvtoolnix library.

See this post:
https://stackoverflow.com/questions/57779975/how-to-extract-audio-from-webm-file

[KRTirtho]

Spotube uses YouTubeExplode & a custom download manager. The best I can do is offer download formats (mp4/webm) in the settings & add the ability to download webm. But the user might need to manually change the format

[ZenKyma]

That would be awesome! I'd appreciate the option 🙏

[hackerb9]

That would be awesome! I'd appreciate the option 🙏

I second the thanks. Being able to avoid non-proprietary formats will be a nice feature to have.