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Forcing Youtube-dl to download YouTube file formats before they're officially listed by YT yields interesting results #24879
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From your 1st listing:
In any case address all such questions to Youtube not here. |
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Maybe not so much a bug as it is a feature?
I uploaded a 1440x1080@59.94 h264 mp4 to YouTube that had an AC3 audio track, stereo, 48000Hz/32-bit.
Once YouTube claimed it was done processing, I tested things by running youtube-dl.
In my first attempt, the following formats were available.
format code extension resolution note
139 m4a audio only DASH audio 49k , m4a_dash container, mp4a.40.5@ 48k (22050Hz)
251 webm audio only DASH audio 120k , webm_dash container, opus @160k (48000Hz)
140 m4a audio only DASH audio 130k , m4a_dash container, mp4a.40.2@128k (44100Hz)
278 webm 192x144 DASH video 95k , webm_dash container, vp9, 30fps, video only
160 mp4 192x144 DASH video 108k , mp4_dash container, avc1.4d400b, 30fps, video only
134 mp4 480x360 DASH video 139k , mp4_dash container, avc1.4d401e, 30fps, video only
242 webm 320x240 DASH video 220k , webm_dash container, vp9, 30fps, video only
133 mp4 320x240 DASH video 242k , mp4_dash container, avc1.4d400c, 30fps, video only
243 webm 480x360 DASH video 405k , webm_dash container, vp9, 30fps, video only
244 webm 640x480 DASH video 752k , webm_dash container, vp9, 30fps, video only
135 mp4 640x480 DASH video 1155k , mp4_dash container, avc1.4d4014, 30fps, video only
247 webm 960x720 DASH video 1505k , webm_dash container, vp9, 30fps, video only
299 mp4 1440x1080 DASH video 2078k , mp4_dash container, avc1.64002a, 60fps, video only
136 mp4 960x720 DASH video 2310k , mp4_dash container, avc1.4d4016, 30fps, video only
302 webm 960x720 DASH video 2646k , webm_dash container, vp9, 60fps, video only
248 webm 1440x1080 DASH video 2646k , webm_dash container, vp9, 30fps, video only
298 mp4 960x720 DASH video 3465k , mp4_dash container, avc1.4d4016, 60fps, video only
137 mp4 1440x1080 DASH video 4331k , mp4_dash container, avc1.64001e, 30fps, video only
303 webm 1440x1080 DASH video 4410k , webm_dash container, vp9, 60fps, video only
18 mp4 480x360 360p 224k , avc1.42001E, mp4a.40.2@ 96k (44100Hz), 604.61KiB
22 mp4 960x720 720p 422k , avc1.64001F, mp4a.40.2@192k (44100Hz) (best)
Interesting that 299 mp4 1440x1080 was not yet listed, I tried to get it anyhow.
... and something downloaded!
After I ran youtube-dl -f 299, I got an mp4 that had a larger filesize than anything I'd tried to get thus far.
VLC claimed it was h264, 1440x1080, video-only file without a framerate listed. Filesize of 4.65 MB.
So I downloaded the best audio file I could find, and joined them together. This time VLC reported that the created file was 59.94 Hz.
About 10 minutes later, I tried again. This time, I had a 299 listed:
format code extension resolution note
139 m4a audio only DASH audio 49k , m4a_dash container, mp4a.40.5@ 48k (22050Hz)
251 webm audio only DASH audio 120k , webm_dash container, opus @160k (48000Hz)
140 m4a audio only DASH audio 130k , m4a_dash container, mp4a.40.2@128k (44100Hz)
278 webm 192x144 DASH video 95k , webm_dash container, vp9, 30fps, video only
160 mp4 192x144 DASH video 108k , mp4_dash container, avc1.4d400b, 30fps, video only
134 mp4 480x360 DASH video 207k , mp4_dash container, avc1.4d401e, 30fps, video only
242 webm 320x240 DASH video 220k , webm_dash container, vp9, 30fps, video only
133 mp4 320x240 DASH video 242k , mp4_dash container, avc1.4d400c, 30fps, video only
243 webm 480x360 DASH video 405k , webm_dash container, vp9, 30fps, video only
244 webm 640x480 DASH video 752k , webm_dash container, vp9, 30fps, video only
135 mp4 640x480 DASH video 1155k , mp4_dash container, avc1.4d4014, 30fps, video only
247 webm 960x720 DASH video 1505k , webm_dash container, vp9, 30fps, video only
136 mp4 960x720 DASH video 2310k , mp4_dash container, avc1.4d4016, 30fps, video only
302 webm 960x720 DASH video 2646k , webm_dash container, vp9, 60fps, video only
248 webm 1440x1080 DASH video 2646k , webm_dash container, vp9, 30fps, video only
298 mp4 960x720 DASH video 3465k , mp4_dash container, avc1.4d4016, 60fps, video only
137 mp4 1440x1080 DASH video 4331k , mp4_dash container, avc1.64001e, 30fps, video only
303 webm 1440x1080 DASH video 4410k , webm_dash container, vp9, 60fps, video only
299 mp4 1440x1080 DASH video 5775k , mp4_dash container, avc1.64001e, 60fps, video only
18 mp4 480x360 360p 224k , avc1.42001E, mp4a.40.2@ 96k (44100Hz), 604.61KiB
22 mp4 960x720 720p 422k , avc1.64001F, mp4a.40.2@192k (44100Hz) (best)
So I downloaded the 299 file again.
This time I got a file that was a little less than half the size - 2.20 MB. VLC reported that it was h264, 1440x1080, video-only file without a framerate listed - once again.
So I joined the MP4 to the best audio I could find. THIS time VLC reported the framerate as 60.029968 - unfortunately a little faster than my original source video.
Anyone have any ideas what happened here? Did I time things just right and download a Youtube-generated file here with a higher bitrate and original framerate as it was being processed? Why is it now generating a 60.029968 framerate at seemingly a lower bitrate?