How to use Laravel FFMpeg to convert file using cuda

Question

I have the following ffmpeg command that converts and scales an input video using cuda:

ffmpeg -hwaccel cuda -hwaccel_output_format cuda -i input.mp4 -c:a copy –vf scale_npp=-1:360:interp_algo=super -c:v h264_nvenc -b:v 5M output.mp4

I'm trying to use Laravel FFMpeg to convert using the following code:

FFMpeg::fromDisk('sources')
    ->setInitialParameters(['-hwaccel', 'cuda', '-hwaccel_output_format', 'cuda'])
    ->open($file)
    ->export()
    ->toDisk('indexed')
    ->setAdditionalParameters(['-c:a', 'copy', '–vf', 'scale_npp=-1:360:interp_algo=super', '-c:v', 'h264_nvenc', '-b:v', '5M'])
    ->save($file);

But the command tries to execute the following command (notice the absence of filenames):

fmpeg.exe -y -hwaccel cuda -hwaccel_output_format cuda -c:a copy –vf scale_npp=-1:360:interp_algo=super -c:v h264_nvenc -b:v 5M

Any idea what I'm doing wrong?

I can live with using directly PHP FFMpeg if the Laravel wrapper can't do it.

Thanks