High quality AAC [format code 141] not available from music.youtube.com URLs

[edenist]

Checklist

• I'm reporting a broken site support
• I've verified that I'm running youtube-dl version 2020.05.08
• I've checked that all provided URLs are alive and playable in a browser
• I've checked that all URLs and arguments with special characters are properly quoted or escaped
• I've searched the bugtracker for similar issues including closed ones

Verbose log

$ youtube-dl --cookies=cookies.txt -F "https://music.youtube.com/watch?v=7_pTSalmH-E" -v
[debug] System config: []
[debug] User config: []
[debug] Custom config: []
[debug] Command-line args: ['--cookies=cookies.txt', '-F', 'https://music.youtube.com/watch?v=7_pTSalmH-E', '-v']
[debug] Encodings: locale UTF-8, fs utf-8, out UTF-8, pref UTF-8
[debug] youtube-dl version 2020.05.08
[debug] Python version 3.7.6 (CPython) - Linux-5.5.11-151.current-x86_64-with-glibc2.2.5
[debug] exe versions: ffmpeg 4.2.2, ffprobe 4.2.2, rtmpdump 2.3
[debug] Proxy map: {}
[youtube] 7_pTSalmH-E: Downloading webpage
[youtube] {18} signature length 107, html5 player 376e3c34
[youtube] {137} signature length 103, html5 player 376e3c34
[youtube] {248} signature length 107, html5 player 376e3c34
[youtube] {136} signature length 103, html5 player 376e3c34
[youtube] {247} signature length 107, html5 player 376e3c34
[youtube] {135} signature length 107, html5 player 376e3c34
[youtube] {244} signature length 103, html5 player 376e3c34
[youtube] {134} signature length 103, html5 player 376e3c34
[youtube] {243} signature length 107, html5 player 376e3c34
[youtube] {133} signature length 107, html5 player 376e3c34
[youtube] {242} signature length 107, html5 player 376e3c34
[youtube] {160} signature length 103, html5 player 376e3c34
[youtube] {278} signature length 107, html5 player 376e3c34
[youtube] {140} signature length 107, html5 player 376e3c34
[youtube] {249} signature length 107, html5 player 376e3c34
[youtube] {250} signature length 103, html5 player 376e3c34
[youtube] {251} signature length 107, html5 player 376e3c34
[info] Available formats for 7_pTSalmH-E:
format code  extension  resolution note
249          webm       audio only tiny   58k , opus @ 50k (48000Hz), 2.18MiB
250          webm       audio only tiny   77k , opus @ 70k (48000Hz), 2.90MiB
140          m4a        audio only tiny  131k , m4a_dash container, mp4a.40.2@128k (44100Hz), 5.48MiB
251          webm       audio only tiny  152k , opus @160k (48000Hz), 5.73MiB
160          mp4        144x144    144p   18k , avc1.4d400b, 25fps, video only, 401.45KiB
278          webm       144x144    144p   19k , webm container, vp9, 25fps, video only, 473.99KiB
242          webm       240x240    240p   19k , vp9, 25fps, video only, 502.29KiB
243          webm       360x360    360p   28k , vp9, 25fps, video only, 676.62KiB
133          mp4        240x240    240p   30k , avc1.4d400c, 25fps, video only, 604.52KiB
244          webm       480x480    480p   31k , vp9, 25fps, video only, 661.17KiB
134          mp4        360x360    360p   57k , avc1.4d4015, 25fps, video only, 986.61KiB
247          webm       720x720    720p   64k , vp9, 25fps, video only, 1.17MiB
135          mp4        480x480    480p   90k , avc1.4d401e, 25fps, video only, 1.46MiB
248          webm       1080x1080  1080p   97k , vp9, 25fps, video only, 1.72MiB
136          mp4        720x720    720p  213k , avc1.4d401f, 25fps, video only, 2.66MiB
137          mp4        1080x1080  1080p  476k , avc1.640020, 25fps, video only, 5.78MiB
18           mp4        360x360    360p  125k , avc1.42001E, 25fps, mp4a.40.2@ 96k (44100Hz), 5.30MiB (best)

Description

When signed up with youtube music premium, a 'high quality' stream is available in the form of format code 141 [256k AAC]. This audio format is only available when using the music.youtube.com site, however.

When using youtube-dl on music.youtube.com links, format code 141 is not available, and instead the highest quality available is 251 [Opus 160k].
If you look at the 'stats for nerds' on both music.youtube.com and regular youtube.com, you can see that they are using 141 and 251, respectively, for the audio codec.

What I suspect is happening, is that music,youtube.com links are simply parsed the same way as regular youtube.com links, and thus the non music site is the one being scraped.

Is there a way to have music youtube links pull the data from music.youtube.com? Or is there something else which is causing -f 141 not to work?

[dstftw]

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