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youtube-dl not displaying correct bitrates for youtube? #5866
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youtube-dl displays bitrate provided by YouTube within metadata. There is nothing we can do if it's wrong. |
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$ youtube-dl -F 'https://www.youtube.com/watch?v=FJjq_WS2_Q8'
[youtube] FJjq_WS2_Q8: Downloading webpage
[youtube] FJjq_WS2_Q8: Extracting video information
[youtube] FJjq_WS2_Q8: Downloading DASH manifest
[info] Available formats for FJjq_WS2_Q8:
format code extension resolution note
140 m4a audio only DASH audio 128k , m4a_dash container, aac @128k (44100Hz), 5.09MiB
171 webm audio only DASH audio 130k , audio@128k (44100Hz), 4.40MiB
141 m4a audio only DASH audio 255k , m4a_dash container, aac @256k (44100Hz), 10.23MiB
160 mp4 256x144 DASH video 111k , 13fps, video only, 4.37MiB
278 webm 256x144 DASH video 117k , webm container, VP9, 13fps, video only, 3.73MiB
133 mp4 426x240 DASH video 251k , 25fps, video only, 9.81MiB
242 webm 426x240 DASH video 306k , 25fps, video only, 9.20MiB
243 webm 640x360 DASH video 561k , 25fps, video only, 16.81MiB
134 mp4 640x360 DASH video 606k , 25fps, video only, 23.91MiB
244 webm 854x480 DASH video 1024k , 25fps, video only, 30.04MiB
135 mp4 854x480 DASH video 1112k , 25fps, video only, 43.94MiB
247 webm 1280x720 DASH video 2137k , 25fps, video only, 60.40MiB
136 mp4 1280x720 DASH video 2223k , 25fps, video only, 87.07MiB
248 webm 1920x1080 DASH video 3834k , 25fps, video only, 109.73MiB
137 mp4 1920x1080 DASH video 4516k , 25fps, video only, 164.31MiB
17 3gp 176x144
36 3gp 320x240
5 flv 400x240
43 webm 640x360
18 mp4 640x360
22 mp4 1280x720 (best)
$ youtube-dl -f 136 'https://www.youtube.com/watch?v=FJjq_WS2_Q8'
[...]
$ youtube-dl -f 247 'https://www.youtube.com/watch?v=FJjq_WS2_Q8'
[...]
$ ls -al FJjq_WS2_Q8
-rw------- 1 user user 91301761 2015-05-22 17:17:51 FJjq_WS2_Q8-136.mp4
-rw------- 1 user user 63332828 2015-05-22 17:44:41 FJjq_WS2_Q8-247.webm
$ mediainfo FJjq_WS2_Q8-136.mp4
General
Complete name : FJjq_WS2_Q8-136.mp4
Format : dash
Codec ID : dash
File size : 87.1 MiB
Duration : 5mn 36s
Overall bit rate : 2 172 Kbps
Encoded date : UTC 2015-05-22 17:17:44
Tagged date : UTC 2015-05-22 17:17:44
Video
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : Main@L3.1
Format settings, CABAC : Yes
Format settings, ReFrames : 3 frames
Codec ID : avc1
Codec ID/Info : Advanced Video Coding
Duration : 5mn 36s
Bit rate : 2 170 Kbps
Width : 1 280 pixels
Height : 720 pixels
Display aspect ratio : 16:9
Frame rate mode : Constant
Frame rate : 25.000 fps
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.094
Stream size : 87.0 MiB (100%)
Encoded date : UTC 2015-05-22 17:17:44
Tagged date : UTC 2015-05-22 17:17:44
$ mediainfo FJjq_WS2_Q8-247.webm
General
Complete name : FJjq_WS2_Q8-247.webm
Format : WebM
Format version : Version 2
File size : 60.4 MiB
Duration : 5mn 36s
Overall bit rate : 1 507 Kbps
Writing application : google
Writing library : google
Video
ID : 1
Format : VP9
Codec ID : V_VP9
Duration : 5mn 36s
Bit rate : 1 440 Kbps
Width : 1 280 pixels
Height : 720 pixels
Display aspect ratio : 16:9
Frame rate mode : Constant
Frame rate : 25.000 fps
Bits/(Pixel*Frame) : 0.063
Stream size : 57.7 MiB (96%)
Language : English
Default : Yes
Forced : No
I realize that quality comparisons between codecs using bitrates are fairly meaningless (better codec can have higher quality at a lower bitrate), but still, numbers are numbers, and the webm stream has a bitrate close to 1500 Kbps, not one anywhere near 2100 Kbps.