there is no audio in some links

[johnssnow810]

One or two from muxed and adaptive links support audio but quality of video is low. And other links have high quality of video but no audio is there.

[hhyeok1026]

Didn't you get the wrong quality or format you want?

Did you choose itag well by looking at the link below?

https://gist.github.com/sidneys/7095afe4da4ae58694d128b1034e01e2

And now there is a bug in this library.
Ciphered video will have a problem.