fix: properly urlencode filename in input.src

[jackssrt]

See corresponding issue for more information.

Fixes #891.

[jackssrt]

I don't know if this problem also applies to Windows, can someone check if doing something similar to what I've done fixes the issue there?
i.e.

: encodeURIComponent(track.path).replaceAll("%5C", "\\").replaceAll("%2F", "/");

I don't have a Windows machine easily accessible to test.

[Geoxor]

I don't know if this problem also applies to Windows, can someone check if doing something similar to what I've done fixes the issue there? i.e.

: encodeURIComponent(track.path).replaceAll("%5C", "\\").replaceAll("%2F", "/");

I don't have a Windows machine easily accessible to test.

This fix doesn't work on windows