$ youtube-dl -F --no-playlist https://youtu.be/LsdxvjLWkIY?list=PLeo1K3hjS3uu7CxAacxVndI4bE_o3BDtO
[youtube:tab] Downloading just video LsdxvjLWkIY because of --no-playlist
[youtube] LsdxvjLWkIY: Downloading webpage
[youtube] Downloading just video LsdxvjLWkIY because of --no-playlist
[info] Available formats for LsdxvjLWkIY:
format code extension resolution note
249 webm audio only tiny 45k , webm_dash container, opus @ 45k (48000Hz), 8.37MiB
250 webm audio only tiny 57k , webm_dash container, opus @ 57k (48000Hz), 10.68MiB
251 webm audio only tiny 100k , webm_dash container, opus @100k (48000Hz), 18.68MiB
140 m4a audio only tiny 129k , m4a_dash container, mp4a.40.2@129k (44100Hz), 23.99MiB
160 mp4 256x144 144p 33k , mp4_dash container, avc1.4d400c@ 33k, 30fps, video only, 6.27MiB
278 webm 256x144 144p 35k , webm_dash container, vp9@ 35k, 30fps, video only, 6.66MiB
242 webm 426x240 240p 53k , webm_dash container, vp9@ 53k, 30fps, video only, 9.95MiB
133 mp4 426x240 240p 69k , mp4_dash container, avc1.4d4015@ 69k, 30fps, video only, 12.94MiB
243 webm 640x360 360p 93k , webm_dash container, vp9@ 93k, 30fps, video only, 17.25MiB
134 mp4 640x360 360p 127k , mp4_dash container, avc1.4d401e@ 127k, 30fps, video only, 23.58MiB
244 webm 854x480 480p 144k , webm_dash container, vp9@ 144k, 30fps, video only, 26.72MiB
135 mp4 854x480 480p 210k , mp4_dash container, avc1.4d401f@ 210k, 30fps, video only, 38.92MiB
247 webm 1280x720 720p 269k , webm_dash container, vp9@ 269k, 30fps, video only, 49.86MiB
136 mp4 1280x720 720p 368k , mp4_dash container, avc1.64001f@ 368k, 30fps, video only, 68.31MiB
248 webm 1920x1080 1080p 365k , webm_dash container, vp9@ 365k, 30fps, video only, 67.79MiB
137 mp4 1920x1080 1080p 625k , mp4_dash container, avc1.640028@ 625k, 30fps, video only, 115.91MiB
271 webm 2560x1440 1440p 1029k , webm_dash container, vp9@1029k, 30fps, video only, 190.72MiB
313 webm 3840x2160 2160p 2026k , webm_dash container, vp9@2026k, 30fps, video only, 375.51MiB
18 mp4 640x360 360p 218k , avc1.42001E, 30fps, mp4a.40.2 (44100Hz), 40.41MiB
22 mp4 1280x720 720p 496k , avc1.64001F, 30fps, mp4a.40.2 (44100Hz) (best)
From this youtube-link I want to download video only with id 137 and audio only with id 140.
How to download the video and audio with specified format together rather than issuing youtube-dl multiple times one for downloading video and second for downloading audio.
This answer comes from the youtube-dl docs:
If you want to download several formats of the same video use a comma as a separator, e.g. -f 137,140 will download both these formats, of course if they are available.
So you can use it like this:
youtube-dl.exe -f 133,139 https://www.youtube.com/watch?v=KkucvzJTgmY
Then you can convert m4a to aac with
ffmpeg -i "audio.m4a" -acodec copy "audio.aac".
And finally join the audio with video:
ffmpeg -i "video.mp4" -i "audio.aac" -c:v copy -c:a copy finalvideo.mp4
It's also possible to merge both downloaded files automatically in youtube-dl by replacing , with + sign, e.g.
youtube-dl.exe -f 133+139 --merge-output-format mp4 https://www.youtube.com/watch?v=KkucvzJTgmY
Another example of the format specification for downloading standard videos with a ratio like 16:9 or 4:3, that are compatible with older hardware is: -f "bestvideo[height<=360][vcodec^=avc1]+bestaudio[acodec^=mp4a]" or for narrow videos use "width<=360".