youtube-dl: behavior change?[solved]

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CaptainBlood · Post by **CaptainBlood** » Fri May 21, 2021 4:18 pm

I used to

youtube-dl -x  <youtube ref>

most of the time providing an opus file, which is highly favored here.
Using it today provided m4a file, despite

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youtube -F <youtube ref>

reveals opus format is available.
Forcing youtube-dl -x -f 241 <youtube ref> forces download of opus data, but encapsulated in .webm.

Any idea how to proceed to recover direct download of opus data in opus file format?

Thks 4 ur attention, interest & support.

sdauth · Post by **sdauth** » Fri May 21, 2021 5:00 pm

Do you have the url ?

I'm using this function :

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ytdl-music_opus() {
youtube-dl  --format bestaudio --extract-audio --audio-format opus -o "%(title)s.%(ext)s" "$1"
}

CaptainBlood · Post by **CaptainBlood** » Fri May 21, 2021 5:17 pm

sdauth,
trying with same url as formerly today...
Your command line downloaded m4a file which ffmpeg converted to opus.

IIRC, youtube-fm used to extract opus from webm file.

Thks 4 ur attention, interest & support.

sdauth · Post by **sdauth** » Fri May 21, 2021 5:28 pm

Indeed. I rarely use that function to be honest. Not very good since it goes from lossy to lossy.
I just tried with this : https://www.youtube.com/watch?v=GVNO0_eR0FM

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youtube-dl -F https://www.youtube.com/watch?v=GVNO0_eR0FM
[youtube] GVNO0_eR0FM: Downloading webpage
[info] Available formats for GVNO0_eR0FM:
format code  extension  resolution note
249          webm       audio only tiny   45k , webm_dash container, opus @ 45k (48000Hz), 602.69KiB
250          webm       audio only tiny   67k , webm_dash container, opus @ 67k (48000Hz), 894.25KiB
251          webm       audio only tiny  122k , webm_dash container, opus @122k (48000Hz), 1.59MiB
140          m4a        audio only tiny  129k , m4a_dash container, mp4a.40.2@129k (44100Hz), 1.69MiB
278          webm       256x144    144p   30k , webm_dash container, vp9@  30k, 30fps, video only, 403.91KiB
160          mp4        256x144    144p   31k , mp4_dash container, avc1.4d400c@  31k, 30fps, video only, 414.60KiB
242          webm       426x240    240p   41k , webm_dash container, vp9@  41k, 30fps, video only, 549.02KiB
133          mp4        426x240    240p   60k , mp4_dash container, avc1.4d4015@  60k, 30fps, video only, 807.79KiB
243          webm       640x360    360p   67k , webm_dash container, vp9@  67k, 30fps, video only, 896.01KiB
134          mp4        640x360    360p  104k , mp4_dash container, avc1.4d401e@ 104k, 30fps, video only, 1.36MiB
244          webm       854x480    480p  105k , webm_dash container, vp9@ 105k, 30fps, video only, 1.38MiB
135          mp4        854x480    480p  170k , mp4_dash container, avc1.4d401f@ 170k, 30fps, video only, 2.22MiB
247          webm       1280x720   720p  198k , webm_dash container, vp9@ 198k, 30fps, video only, 2.58MiB
136          mp4        1280x720   720p  297k , mp4_dash container, avc1.64001f@ 297k, 30fps, video only, 3.87MiB
248          webm       1920x1080  1080p  291k , webm_dash container, vp9@ 291k, 30fps, video only, 3.79MiB
137          mp4        1920x1080  1080p  507k , mp4_dash container, avc1.640028@ 507k, 30fps, video only, 6.60MiB
271          webm       2560x1440  1440p  864k , webm_dash container, vp9@ 864k, 30fps, video only, 11.25MiB
313          webm       3840x2160  2160p 1589k , webm_dash container, vp9@1589k, 30fps, video only, 20.68MiB
18           mp4        640x360    360p  187k , avc1.42001E, 30fps, mp4a.40.2 (44100Hz), 2.44MiB
22           mp4        1280x720   720p  425k , avc1.64001F, 30fps, mp4a.40.2 (44100Hz) (best)

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youtube-dl -f 251 https://www.youtube.com/watch?v=GVNO0_eR0FM

returns a .webm with opus

if you add -x :

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youtube-dl -f 251 -x https://www.youtube.com/watch?v=GVNO0_eR0FM

then you get the .opus only. Maybe a bug with youtube with your url, I'm not sure.

CaptainBlood · Post by **CaptainBlood** » Fri May 21, 2021 5:49 pm

Indeed,

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youtube -f<index for opus> -x <youtube ref>

allows to directly download opus file.
Easier than mkextract way of doing things.
Thks 4 ur attention, interest.

CaptainBlood · Post by **CaptainBlood** » Fri May 21, 2021 6:45 pm

My bad

, -x does its job selecting m4a as best when downloading initial url.
Thks 4 ur attention, interest & support.

figueroa · Post by **figueroa** » Mon May 24, 2021 3:53 am

youtube-dl facebookurl gives me an mp4 by default.

Website · Post by **Zucca** » Mon May 24, 2021 7:15 am

One could use --prefer-ffmpeg and --merge-output-format ogg/mkv (choose one or the other).
This method does not support opus container, or at least --help does indicate that. However, if the argument is passed to ffmpeg unmodified it should still work.

... or one can make youtube-dl to pipe the output to ffmpeg, then

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ffmpeg -f ogg -i - -c:a copy -f opus to/file.opus

... or something along those lines. The conversion is lossless when using stream copy (-c:a copy).