Headless "Select reference language first"

[CWuestefeld]

Running command:

"C:\Program Files\subsync\subsync-cmd.exe" --verbose 3 sync --sub-file "mymovie.eng.srt" --sub-lang ENG --ref-file "mymovie.avi" --ref-lang ENG --ref-channels auto --out "mymovie.eng.srt"

Gives me this output:

[!] Select reference language first
[-] sub: mymovie.eng.srt:0/1, type=subtitle/text, lang=eng
[-] ref: mymovie.avi:1/2, type=audio, fps=25.0
[-] out: mymovie.eng.srt, enc=UTF-8

Since I've included the "--ref-lang" option, I don't get what it's complaining about.