Народ, вы не поверите, но mp3 можно получить вчетверо быстрее:
$ echo '76.29/18.48' | bc -l
4.12824675324675324675
Подсказку дал штатовский инет:
Старая команда топикстартера
Спойлер
$ time -f %e youtube-dl -v -x --audio-format mp3 https://www.youtube.com/watch?v=SUZFLKb0rsw
[debug] System config: []
[debug] User config: []
[debug] Custom config: []
[debug] Command-line args: ['-v', '-x', '--audio-format', 'mp3', 'https://www.youtube.com/watch?v=SUZFLKb0rsw']
[debug] Encodings: locale UTF-8, fs utf-8, out UTF-8, pref UTF-8
[debug] youtube-dl version 2017.12.23
[debug] Python version 3.5.4 - Linux-4.4.97-std-pae-alt0.M80P.1-i686-with-fedora-ALT-Linux
[debug] exe versions: avconv 11.6-alt1, avprobe 11.6-alt1
[debug] Proxy map: {}
[youtube] SUZFLKb0rsw: Downloading webpage
[youtube] SUZFLKb0rsw: Downloading video info webpage
[youtube] SUZFLKb0rsw: Extracting video information
[youtube] {22} signature length 43.42, html5 player vflJSc09H
[youtube] {43} signature length 43.42, html5 player vflJSc09H
[youtube] {18} signature length 43.42, html5 player vflJSc09H
[youtube] {36} signature length 43.42, html5 player vflJSc09H
[youtube] {17} signature length 43.42, html5 player vflJSc09H
[youtube] {137} signature length 43.42, html5 player vflJSc09H
[youtube] {248} signature length 43.42, html5 player vflJSc09H
[youtube] {136} signature length 43.42, html5 player vflJSc09H
[youtube] {247} signature length 43.42, html5 player vflJSc09H
[youtube] {135} signature length 43.42, html5 player vflJSc09H
[youtube] {244} signature length 43.42, html5 player vflJSc09H
[youtube] {134} signature length 43.42, html5 player vflJSc09H
[youtube] {243} signature length 43.42, html5 player vflJSc09H
[youtube] {133} signature length 43.42, html5 player vflJSc09H
[youtube] {242} signature length 43.42, html5 player vflJSc09H
[youtube] {160} signature length 43.42, html5 player vflJSc09H
[youtube] {278} signature length 43.42, html5 player vflJSc09H
[youtube] {140} signature length 43.42, html5 player vflJSc09H
[youtube] {171} signature length 43.42, html5 player vflJSc09H
[youtube] {249} signature length 43.42, html5 player vflJSc09H
[youtube] {250} signature length 43.42, html5 player vflJSc09H
[youtube] {251} signature length 43.42, html5 player vflJSc09H
[debug] Invoking downloader on 'https://r8---sn-cxauxaxjvh-hn9ee.googlevideo.com/videoplayback?gir=yes&mn=sn-cxauxaxjvh-hn9ee%2Csn-4g5ednz7&clen=3985352&ms=au%2Conr&ei=WqlqW7a3E5KbgQfY6KrAAg&mv=m&mt=1533716747&requiressl=yes&mime=audio%2Fwebm&pl=19&itag=251&keepalive=yes&c=WEB&ipbits=0&sparams=clen%2Cdur%2Cei%2Cgir%2Cid%2Cinitcwndbps%2Cip%2Cipbits%2Citag%2Ckeepalive%2Clmt%2Cmime%2Cmm%2Cmn%2Cms%2Cmv%2Cpl%2Crequiressl%2Csource%2Cexpire&mm=31%2C26&expire=1533738426&dur=249.941&lmt=1527931234818462&key=yt6&ip=37.212.23.117&fvip=2&initcwndbps=662500&source=youtube&id=o-AGF7sTHT2szb7wcN7A3ECRhoqL3SOLN63BtVpKWnr9Y_&signature=63AD226639B0DCD142FF4FC55ED27D567578733D.4F2B5008CA16F9D0798AEB4137421F27DCA0D3EE&ratebypass=yes'
[download] Destination: Trying Not To Love You - Nickelback - Lyrics-SUZFLKb0rsw.webm
[download] 100% of 3.80MiB in 01:03
[debug] avconv command line: avprobe -show_streams 'file:Trying Not To Love You - Nickelback - Lyrics-SUZFLKb0rsw.webm'
[ffmpeg] Destination: Trying Not To Love You - Nickelback - Lyrics-SUZFLKb0rsw.mp3
[debug] ffmpeg command line: avconv -y -i 'file:Trying Not To Love You - Nickelback - Lyrics-SUZFLKb0rsw.webm' -vn -acodec libmp3lame -q:a 5 'file:Trying Not To Love You - Nickelback - Lyrics-SUZFLKb0rsw.mp3'
Deleting original file Trying Not To Love You - Nickelback - Lyrics-SUZFLKb0rsw.webm (pass -k to keep)
76.29
$ mediainfo Trying\ Not\ To\ Love\ You\ -\ Nickelback\ -\ Lyrics-SUZFLKb0rsw.mp3
General
Complete name : Trying Not To Love You - Nickelback - Lyrics-SUZFLKb0rsw.mp3
Format : MPEG Audio
File size : 3.65 MiB
Duration : 4 min 9 s
Overall bit rate mode : Variable
Overall bit rate : 123 kb/s
Writing library : Lavf56.1.0
Audio
Format : MPEG Audio
Format version : Version 1
Format profile : Layer 3
Format settings : Joint stereo
Mode : Joint stereo
Duration : 4 min 9 s
Bit rate mode : Variable
Bit rate : 123 kb/s
Channel(s) : 2 channels
Sampling rate : 48.0 kHz
Compression mode : Lossy
Stream size : 3.65 MiB (100%)
Новая команда
Спойлер
$ rm -f Trying\ Not\ To\ Love\ You\ -\ Nickelback\ -\ Lyrics-SUZFLKb0rsw.mp3
$ time -f %e youtube-dl -v --format best -x --audio-format mp3 https://www.youtube.com/watch?v=SUZFLKb0rsw > yt.log.txt
[debug] System config: []
[debug] User config: []
[debug] Custom config: []
[debug] Command-line args: ['-v', '--format', 'best', '-x', '--audio-format', 'mp3', 'https://www.youtube.com/watch?v=SUZFLKb0rsw']
[debug] Encodings: locale UTF-8, fs utf-8, out UTF-8, pref UTF-8
[debug] youtube-dl version 2017.12.23
[debug] Python version 3.5.4 - Linux-4.4.97-std-pae-alt0.M80P.1-i686-with-fedora-ALT-Linux
[debug] exe versions: avconv 11.6-alt1, avprobe 11.6-alt1
[debug] Proxy map: {}
18.48
$ cat yt.log.txt
[youtube] SUZFLKb0rsw: Downloading webpage
[youtube] SUZFLKb0rsw: Downloading video info webpage
[youtube] SUZFLKb0rsw: Extracting video information
[youtube] {22} signature length 43.42, html5 player vflJSc09H
[youtube] {43} signature length 43.42, html5 player vflJSc09H
[youtube] {18} signature length 43.42, html5 player vflJSc09H
[youtube] {36} signature length 43.42, html5 player vflJSc09H
[youtube] {17} signature length 43.42, html5 player vflJSc09H
[youtube] {137} signature length 43.42, html5 player vflJSc09H
[youtube] {248} signature length 43.42, html5 player vflJSc09H
[youtube] {136} signature length 43.42, html5 player vflJSc09H
[youtube] {247} signature length 43.42, html5 player vflJSc09H
[youtube] {135} signature length 43.42, html5 player vflJSc09H
[youtube] {244} signature length 43.42, html5 player vflJSc09H
[youtube] {134} signature length 43.42, html5 player vflJSc09H
[youtube] {243} signature length 43.42, html5 player vflJSc09H
[youtube] {133} signature length 43.42, html5 player vflJSc09H
[youtube] {242} signature length 43.42, html5 player vflJSc09H
[youtube] {160} signature length 43.42, html5 player vflJSc09H
[youtube] {278} signature length 43.42, html5 player vflJSc09H
[youtube] {140} signature length 43.42, html5 player vflJSc09H
[youtube] {171} signature length 43.42, html5 player vflJSc09H
[youtube] {249} signature length 43.42, html5 player vflJSc09H
[youtube] {250} signature length 43.42, html5 player vflJSc09H
[youtube] {251} signature length 43.42, html5 player vflJSc09H
[debug] Invoking downloader on 'https://r8---sn-cxauxaxjvh-hn9ee.googlevideo.com/videoplayback?requiressl=yes&ip=37.212.23.117&ratebypass=yes&mv=m&source=youtube&ms=au%2Conr&mn=sn-cxauxaxjvh-hn9ee%2Csn-4g5ednz7&mm=31%2C26&pl=19&mime=video%2Fmp4&id=o-AEMYFyTPw0dm7o6uDJEUOST49VC1GtfNTMW1ApV3YbEh&sparams=dur%2Cei%2Cid%2Cinitcwndbps%2Cip%2Cipbits%2Citag%2Clmt%2Cmime%2Cmm%2Cmn%2Cms%2Cmv%2Cpl%2Cratebypass%2Crequiressl%2Csource%2Cexpire&itag=22&lmt=1527930348720706&key=yt6&expire=1533737180&beids=%5B9466592%5D&mt=1533715509&fvip=2&dur=249.962&initcwndbps=676250&c=WEB&ipbits=0&ei=e6RqW-H6N4u11gKnpKfIBw&signature=39CCAA8B06F397AFD79B975329F0AD29B0FD4BDF.69BBF1B62365527B7423C0656EDF63F574AED0FA'
[download] Destination: Trying Not To Love You - Nickelback - Lyrics-SUZFLKb0rsw.mp4
[download] 100% of 27.72MiB in 00:08
[debug] avconv command line: avprobe -show_streams 'file:Trying Not To Love You - Nickelback - Lyrics-SUZFLKb0rsw.mp4'
[ffmpeg] Destination: Trying Not To Love You - Nickelback - Lyrics-SUZFLKb0rsw.mp3
[debug] ffmpeg command line: avconv -y -i 'file:Trying Not To Love You - Nickelback - Lyrics-SUZFLKb0rsw.mp4' -vn -acodec libmp3lame -q:a 5 'file:Trying Not To Love You - Nickelback - Lyrics-SUZFLKb0rsw.mp3'
Deleting original file Trying Not To Love You - Nickelback - Lyrics-SUZFLKb0rsw.mp4 (pass -k to keep)
$ mediainfo Trying\ Not\ To\ Love\ You\ -\ Nickelback\ -\ Lyrics-SUZFLKb0rsw.mp3
General
Complete name : Trying Not To Love You - Nickelback - Lyrics-SUZFLKb0rsw.mp3
Format : MPEG Audio
File size : 3.51 MiB
Duration : 4 min 9 s
Overall bit rate mode : Variable
Overall bit rate : 118 kb/s
Encoded date : UTC 2018-06- 2 09:05:32
Writing library : Lavf56.1.0
major_brand : mp42
minor_version : 0
compatible_brands : isommp42
Audio
Format : MPEG Audio
Format version : Version 1
Format profile : Layer 3
Format settings : Joint stereo
Mode : Joint stereo
Duration : 4 min 9 s
Bit rate mode : Variable
Bit rate : 118 kb/s
Channel(s) : 2 channels
Sampling rate : 44.1 kHz
Compression mode : Lossy
Stream size : 3.51 MiB (100%)
$ mplayer -softvol -nocache Trying\ Not\ To\ Love\ You\ -\ Nickelback\ -\ Lyrics-SUZFLKb0rsw.mp3
MPlayer 1.1-5.3.1 (C) 2000-2012 MPlayer Team
192 audio & 401 video codecs
Playing Trying Not To Love You - Nickelback - Lyrics-SUZFLKb0rsw.mp3.
libavformat version 54.6.100 (internal)
Audio only file format detected.
Load subtitles in ./
==========================================================================
Opening audio decoder: [mpg123] MPEG 1.0/2.0/2.5 layers I, II, III
AUDIO: 44100 Hz, 2 ch, s16le, 32.0 kbit/2.27% (ratio: 4000->176400)
Selected audio codec: [mpg123] afm: mpg123 (MPEG 1.0/2.0/2.5 layers I, II, III)
==========================================================================
AO: [alsa] 48000Hz 2ch s16le (2 bytes per sample)
Video: no video
Starting playback...
A: 26.9 (26.9) of 259.0 (04:19.0) 1.1%
MPlayer interrupted by signal 2 in module: play_audio
A: 27.0 (26.9) of 259.0 (04:19.0) 1.1%
Exiting... (Quit)
А в чём фишка? Фишка в том, что последней командой качаем не webm, а mp4.