a noter que l'audio est maintenant disponible a part dans plusieurs formats:
youtube-dl -F https://www.youtube.com/watch?v=zhl-Cs1-sG4
[youtube] zhl-Cs1-sG4: Downloading webpage
[youtube] zhl-Cs1-sG4: Extracting video information
[youtube] zhl-Cs1-sG4: Downloading DASH manifest
[info] Available formats for zhl-Cs1-sG4:
format code extension resolution note
139 m4a audio only DASH audio 48k , audio@ 48k (22050Hz), 3.14MiB (worst)
140 m4a audio only DASH audio 128k , audio@128k (44100Hz), 8.39MiB
171 webm audio only DASH audio 174k , audio@128k (44100Hz), 9.03MiB
141 m4a audio only DASH audio 256k , audio@256k (44100Hz), 16.84MiB
172 webm audio only DASH audio 293k , audio@256k (44100Hz), 14.24MiB
160 mp4 256x144 DASH video 118k , 15fps, video only, 7.42MiB
242 webm 426x240 DASH video 100k , 1fps, video only, 6.44MiB
133 mp4 426x240 DASH video 249k , 24fps, video only, 16.09MiB
243 webm 640x360 DASH video 191k , 1fps, video only, 12.23MiB
134 mp4 640x360 DASH video 286k , 24fps, video only, 18.16MiB
244 webm 854x480 DASH video 392k , 1fps, video only, 25.15MiB
135 mp4 854x480 DASH video 648k , 24fps, video only, 37.57MiB
247 webm 1280x720 DASH video 645k , 1fps, video only, 41.31MiB
136 mp4 1280x720 DASH video 1419k , 24fps, video only, 73.64MiB
248 webm 1920x1080 DASH video 1350k , 1fps, video only, 87.11MiB
137 mp4 1920x1080 DASH video 2457k , 24fps, video only, 127.81MiB
17 3gp 176x144
36 3gp 320x240
5 flv 400x240
43 webm 640x360
18 mp4 640x360
22 mp4 1280x720 (best)
auparavant il n'y avait en général qu'un seul flux audio en DASH, le format 140 a 128k et qu'un seul encodage pour l'audio (m4a).
Depuis peu on a donc 2 encodages dispo et 3 qualités audio.