batch downloading video of medium quality with audio

[shnk]

I am using this command to download the video of desired quality but the problem is that it has no audio.

youtube-dl -o"%(title)s.%(ext)s" -f 135/134/136/137 [URL]

I can download the video with this command but it takes too much bandwidth and disk space, so I want to avoid it.

youtube-dl -o"%(title)s.%(ext)s" -f "best" [URL]

I do not understand why aforementioned command does not work.
Please help.
thanks.

[phihag]

Well, all of the formats you list are DASH formats and therefore don't contain audio. What you can do is run youtube-dl -F YOUR_VIDEO_URL. That will output a list of formats that the given video is available in. Pick the formats that are of acceptable size and do contain both video and audio, i.e. do not include DASH in their description.

[shnk]

@phihag
I want to batch download all the links written in the given text file using convenient code. Like

youtube-dl -o"%(title)s.%(ext)s" -f "medium" -a location_of_text_file

I know there isn't any keyword like "medium". But still, is it possible to reach this goal using alternative code? If yes, then please help.

Alternatively, is it possible to download desired dash Audio and Video and then combine them?

[phihag]

You don't actually want medium, do you? Imagine a video that is only available in 100MB/s, 50MB/s, 20MB/s, 10MB/s, 2MB/s, 1MB/s. medium would be 20MB/s, but you would want 1MB/s. What you can do is pick any video and look at the available formats and pick those that you like. For example,

-f 18/43/5/best

is a reasonable value for YouTube.