--convert-subs only works if you don't put --skip-download

[hamidb80]

I considered that --convert-subs <FORMAT> not working if put --skip-download in the command.

youtube-dl https://www.youtube.com/watch?v=48sCx-wBs34 --convert-subs srt --write-auto-sub --sub-langs en  --skip-download

But if I download video with subtitle, it converts subtitle to given format perfectly.

youtube-dl https://www.youtube.com/watch?v=48sCx-wBs34 --convert-subs srt --write-auto-sub --sub-langs en  -f worst