TypeError: must be real number, not NoneType

[softsweets]

File ~\Anaconda3\envs\py38\lib\site-packages\moviepy\video\io\ffmpeg_writer.py:88, in FFMPEG_VideoWriter.init(self, filename, size, fps, codec, audiofile, preset, bitrate, withmask, logfile, threads, ffmpeg_params) 77 self.ext = self.filename.split(".")[-1] 79 # order is important 80 cmd = [ 81 get_setting("FFMPEG_BINARY"), 82 '-y', 83 '-loglevel', 'error' if logfile == sp.PIPE else 'info', 84 '-f', 'rawvideo', 85 '-vcodec', 'rawvideo', 86 '-s', '%dx%d' % (size[0], size[1]), 87 '-pix_fmt', 'rgba' if withmask else 'rgb24', ---> 88 '-r', '%.02f' % fps, 89 '-an', '-i', '-' 90 ] 91 if audiofile is not None: 92 cmd.extend([ 93 '-i', audiofile, 94 '-acodec', 'copy' 95 ])

TypeError: must be real number, not NoneType