fluent-ffmpeg and Waifu2x.parseFramerate can't use the same ffmpeg path

[Specy]

fluent-ffmpeg expects the path of ffmpeg including the ffmpeg.exe at the end, example:

C:\Users\dione\Desktop\Progetti\electron\scapix\ffmpeg\ffmpeg.exe

and instead the Waifu2x.parseFramerate function expects the path to be

C:\Users\dione\Desktop\Progetti\electron\scapix\ffmpeg\

as it needs to cd to that path.

When i do:

let videoOptions = {
     quality:0,
     noise: noise,
     scale: el.scale,
     ffmpegPath: "C:\Users\dione\Desktop\Progetti\electron\scapix\ffmpeg\ffmpeg.exe"
}
Waifu2x.upscaleVideo(filePath,endPath,videoOptions)

i get the error:

TypeError: Cannot read property '0' of null
[1]     at C:\Users\dione\Desktop\Progetti\electron\scapix\node_modules\waifu2x\dist\waifu2x.js:423:78
[1]     at step (C:\Users\dione\Desktop\Progetti\electron\scapix\node_modules\waifu2x\dist\waifu2x.js:33:23)
[1]     at Object.next (C:\Users\dione\Desktop\Progetti\electron\scapix\node_modules\waifu2x\dist\waifu2x.js:14:53)
[1]     at fulfilled (C:\Users\dione\Desktop\Progetti\electron\scapix\node_modules\waifu2x\dist\waifu2x.js:5:58)

Which produces the stderr "path name not valid"
While if i remove ffmpeg.exe from ffmpegPath i get this error:

 Error: spawn C:\Users\dione\Desktop\Progetti\electron\scapix\ffmpeg ENOENT
[1]     at Process.ChildProcess._handle.onexit (internal/child_process.js:267:19)
[1]     at onErrorNT (internal/child_process.js:469:16)
[1]     at processTicksAndRejections (internal/process/task_queues.js:84:21) {
[1]   errno: 'ENOENT',
[1]   code: 'ENOENT',
[1]   syscall: 'spawn C:\\Users\\dione\\Desktop\\Progetti\\electron\\scapix\\ffmpeg',
[1]   path: 'C:\\Users\\dione\\Desktop\\Progetti\\electron\\scapix\\ffmpeg',
[1]   spawnargs: [ '-formats' ]
[1] }

coming from fluent-ffmpeg

Fix would be to just remove "ffmpeg.exe" from ffmpegPath

[Moebits]

You were using cd ${ffmpegPath} in the code you provided before, so I thought it was a directory! You can upgrade to v0.3.8.