How to merge external audio tracks？

[husk0808]

mpv --playlist=1.txt --audio-file=000002-001.mka --audio-file=000002-002.mka --merge-files

This is my code. Is there a way to also merge external audio tracks?

[husk0808]

I found the problem. In fact, I know to use edl://
But it doesn’t seem to support https:// +? parameters