How to address input and output files?

[arasrezaei]

I am using Capacitor which is Ionics Cordova alternative.
I tried code below:

ffmpeg.exec(
      "-i storage/emulated/0/Documents/digipro/video/video_one.mp4 -vn -c:a copy storage/emulated/0/out.mp3",
      (s: any) => console.log(s),
      (e: any) => console.log(e)
    );

it throws error code 1.
I changed input and output path (with file:// or http://localhost/_capacitor_file_/ scheme) but neither working

[arasrezaei]

solved,
problem was using codecs like "libvpx" that throwed errors

[adminy]

makes sense, also make sure your IO is available for read/write

[arasrezaei]

which libraries added to it?
how to add libx264 for example

[adminy]

have a look at this