vorbis or libvorbis on ffmpeg?

[fluoroom]

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Question

My simple doubt is that, youtube-dl tells ffmpeg to use vorbis or libvorbis? I read on ffmpeg website that libvorbis is the one that should be used and it's confusing that youtube-dl has only the "vorbis" option.
Thanks in advance!

[remitamine]

the user does not have to know every internal FFmpeg library(libvorbis, libopus, libmp3lame...) to use youtube-dl options.
and BTW, yes youtube-dl passes libvorbis to FFmpeg: https://github.com/ytdl-org/youtube-dl/blob/master/youtube_dl/postprocessor/ffmpeg.py#L45

[fluoroom]

Thank you!