Audio cut failing

[parse2]

Recently I've come across this error whenever using any of the three audio cutting functions:
'Error parsing commandline option start: option requires parameter'

With no programming knowledge and extensive Googling, I believe I've tracked the problem: mpv's syntax doesn't support the old format anymore. I changed the code from

args = [ mpv_path, video_path, "--start", start_timestamp.toString(), "--end", end_timestamp.toString(), "--aid", aid.toString(), "--video=no", "--o=" + filename ]

to

args = [ mpv_path, video_path, "--start=" + start_timestamp.toString(), "--end=" + end_timestamp.toString(), "--aid=" + aid.toString(), "--video=no", "--o=" + filename ]

and it seemingly works the same as before I started getting this error.